diff --git a/TUnit.Core.SourceGenerator.Tests/AbstractTests.Concrete1.verified.txt b/TUnit.Core.SourceGenerator.Tests/AbstractTests.Concrete1.verified.txt
index fab1f88ef0..d25c50fd21 100644
--- a/TUnit.Core.SourceGenerator.Tests/AbstractTests.Concrete1.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/AbstractTests.Concrete1.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass1_AssertClassName_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AbstractTests.ConcreteClass1>
         {
@@ -52,7 +52,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass1_AssertClass
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AbstractTests.ConcreteClass1(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AbstractTests.ConcreteClass1(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -66,8 +66,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass1_AssertClass
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -84,7 +83,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass1_AssertClass
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/AbstractTests.Concrete2.verified.txt b/TUnit.Core.SourceGenerator.Tests/AbstractTests.Concrete2.verified.txt
index 66defbf2bf..8aac896da7 100644
--- a/TUnit.Core.SourceGenerator.Tests/AbstractTests.Concrete2.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/AbstractTests.Concrete2.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_SecondTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AbstractTests.ConcreteClass2>
         {
@@ -53,7 +53,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_SecondTest_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AbstractTests.ConcreteClass2(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AbstractTests.ConcreteClass2(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -68,8 +68,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_SecondTest_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -86,7 +85,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_SecondTest_
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -111,7 +110,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_AssertClassName_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AbstractTests.ConcreteClass2>
         {
@@ -157,7 +156,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_AssertClass
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AbstractTests.ConcreteClass2(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AbstractTests.ConcreteClass2(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -171,8 +170,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_AssertClass
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -189,7 +187,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_AssertClass
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -214,7 +212,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass1_AssertClassName_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AbstractTests.ConcreteClass1>
         {
@@ -259,7 +257,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass1_AssertClass
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AbstractTests.ConcreteClass1(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AbstractTests.ConcreteClass1(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -273,8 +271,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass1_AssertClass
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -291,7 +288,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass1_AssertClass
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/AfterAllTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/AfterAllTests.Test.verified.txt
index 4e30952655..a3ad44119d 100644
--- a/TUnit.Core.SourceGenerator.Tests/AfterAllTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/AfterAllTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AfterTests_CleanupTests_Test1_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AfterTests.CleanupTests>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_AfterTests_CleanupTests_Test1_TestSource
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AfterTests.CleanupTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AfterTests.CleanupTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -65,8 +65,7 @@ internal sealed class TUnit_TestProject_AfterTests_CleanupTests_Test1_TestSource
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -83,7 +82,7 @@ internal sealed class TUnit_TestProject_AfterTests_CleanupTests_Test1_TestSource
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -108,7 +107,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AfterTests_CleanupTests_Test2_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AfterTests.CleanupTests>
         {
@@ -152,7 +151,7 @@ internal sealed class TUnit_TestProject_AfterTests_CleanupTests_Test2_TestSource
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AfterTests.CleanupTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AfterTests.CleanupTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -166,8 +165,7 @@ internal sealed class TUnit_TestProject_AfterTests_CleanupTests_Test2_TestSource
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -184,7 +182,7 @@ internal sealed class TUnit_TestProject_AfterTests_CleanupTests_Test2_TestSource
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/AfterTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/AfterTests.Test.verified.txt
index 4e30952655..a3ad44119d 100644
--- a/TUnit.Core.SourceGenerator.Tests/AfterTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/AfterTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AfterTests_CleanupTests_Test1_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AfterTests.CleanupTests>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_AfterTests_CleanupTests_Test1_TestSource
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AfterTests.CleanupTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AfterTests.CleanupTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -65,8 +65,7 @@ internal sealed class TUnit_TestProject_AfterTests_CleanupTests_Test1_TestSource
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -83,7 +82,7 @@ internal sealed class TUnit_TestProject_AfterTests_CleanupTests_Test1_TestSource
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -108,7 +107,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AfterTests_CleanupTests_Test2_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AfterTests.CleanupTests>
         {
@@ -152,7 +151,7 @@ internal sealed class TUnit_TestProject_AfterTests_CleanupTests_Test2_TestSource
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AfterTests.CleanupTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AfterTests.CleanupTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -166,8 +165,7 @@ internal sealed class TUnit_TestProject_AfterTests_CleanupTests_Test2_TestSource
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -184,7 +182,7 @@ internal sealed class TUnit_TestProject_AfterTests_CleanupTests_Test2_TestSource
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ArgsAsArrayTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/ArgsAsArrayTests.Test.verified.txt
index b9d2d43b8e..e8a0fbcbfc 100644
--- a/TUnit.Core.SourceGenerator.Tests/ArgsAsArrayTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ArgsAsArrayTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ArgsAsArrayTests_Params__string___TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ArgsAsArrayTests>
         {
@@ -63,7 +63,7 @@ internal sealed class TUnit_TestProject_ArgsAsArrayTests_Params__string___TestSo
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ArgsAsArrayTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ArgsAsArrayTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -116,8 +116,7 @@ internal sealed class TUnit_TestProject_ArgsAsArrayTests_Params__string___TestSo
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -134,7 +133,7 @@ internal sealed class TUnit_TestProject_ArgsAsArrayTests_Params__string___TestSo
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -159,7 +158,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ArgsAsArrayTests_ParamsEnumerable__IEnumerable_string__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ArgsAsArrayTests>
         {
@@ -215,7 +214,7 @@ internal sealed class TUnit_TestProject_ArgsAsArrayTests_ParamsEnumerable__IEnum
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ArgsAsArrayTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ArgsAsArrayTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -268,8 +267,7 @@ internal sealed class TUnit_TestProject_ArgsAsArrayTests_ParamsEnumerable__IEnum
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -286,7 +284,7 @@ internal sealed class TUnit_TestProject_ArgsAsArrayTests_ParamsEnumerable__IEnum
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -311,7 +309,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ArgsAsArrayTests_Following_Non_Params__int_IEnumerable_string__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ArgsAsArrayTests>
         {
@@ -374,7 +372,7 @@ internal sealed class TUnit_TestProject_ArgsAsArrayTests_Following_Non_Params__i
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ArgsAsArrayTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ArgsAsArrayTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -427,8 +425,7 @@ internal sealed class TUnit_TestProject_ArgsAsArrayTests_Following_Non_Params__i
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -445,7 +442,7 @@ internal sealed class TUnit_TestProject_ArgsAsArrayTests_Following_Non_Params__i
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ArgumentWithImplicitConverterTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/ArgumentWithImplicitConverterTests.Test.verified.txt
index 560c393dac..1cf5c30af4 100644
--- a/TUnit.Core.SourceGenerator.Tests/ArgumentWithImplicitConverterTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ArgumentWithImplicitConverterTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ArgumentWithImplicitConverterTests_Explicit__ExplicitInteger_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ArgumentWithImplicitConverterTests>
         {
@@ -66,7 +66,7 @@ internal sealed class TUnit_TestProject_ArgumentWithImplicitConverterTests_Expli
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ArgumentWithImplicitConverterTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ArgumentWithImplicitConverterTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -89,8 +89,7 @@ internal sealed class TUnit_TestProject_ArgumentWithImplicitConverterTests_Expli
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -107,7 +106,7 @@ internal sealed class TUnit_TestProject_ArgumentWithImplicitConverterTests_Expli
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -132,7 +131,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ArgumentWithImplicitConverterTests_Implicit__ImplicitInteger_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ArgumentWithImplicitConverterTests>
         {
@@ -191,7 +190,7 @@ internal sealed class TUnit_TestProject_ArgumentWithImplicitConverterTests_Impli
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ArgumentWithImplicitConverterTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ArgumentWithImplicitConverterTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -214,8 +213,7 @@ internal sealed class TUnit_TestProject_ArgumentWithImplicitConverterTests_Impli
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -232,7 +230,7 @@ internal sealed class TUnit_TestProject_ArgumentWithImplicitConverterTests_Impli
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/AssemblyLoaderTests.Test.DotNet10_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/AssemblyLoaderTests.Test.DotNet10_0.verified.txt
index 8f646e8df3..3f1e5b2fcb 100644
--- a/TUnit.Core.SourceGenerator.Tests/AssemblyLoaderTests.Test.DotNet10_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/AssemblyLoaderTests.Test.DotNet10_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -66,8 +66,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -84,7 +83,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -109,7 +108,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -153,7 +152,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -167,8 +166,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -185,7 +183,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -210,7 +208,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -254,7 +252,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -268,8 +266,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -286,7 +283,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/AssemblyLoaderTests.Test.DotNet8_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/AssemblyLoaderTests.Test.DotNet8_0.verified.txt
index 8f646e8df3..3f1e5b2fcb 100644
--- a/TUnit.Core.SourceGenerator.Tests/AssemblyLoaderTests.Test.DotNet8_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/AssemblyLoaderTests.Test.DotNet8_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -66,8 +66,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -84,7 +83,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -109,7 +108,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -153,7 +152,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -167,8 +166,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -185,7 +183,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -210,7 +208,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -254,7 +252,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -268,8 +266,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -286,7 +283,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/AssemblyLoaderTests.Test.DotNet9_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/AssemblyLoaderTests.Test.DotNet9_0.verified.txt
index 8f646e8df3..3f1e5b2fcb 100644
--- a/TUnit.Core.SourceGenerator.Tests/AssemblyLoaderTests.Test.DotNet9_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/AssemblyLoaderTests.Test.DotNet9_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -66,8 +66,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -84,7 +83,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -109,7 +108,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -153,7 +152,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -167,8 +166,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -185,7 +183,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -210,7 +208,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -254,7 +252,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -268,8 +266,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -286,7 +283,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/AssemblyLoaderTests.Test.Net4_7.verified.txt b/TUnit.Core.SourceGenerator.Tests/AssemblyLoaderTests.Test.Net4_7.verified.txt
index 57a80528d1..1a37a733f3 100644
--- a/TUnit.Core.SourceGenerator.Tests/AssemblyLoaderTests.Test.Net4_7.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/AssemblyLoaderTests.Test.Net4_7.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -66,8 +66,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -84,7 +83,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -109,7 +108,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -153,7 +152,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -167,8 +166,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -185,7 +183,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -210,7 +208,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -254,7 +252,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -268,8 +266,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -286,7 +283,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/AsyncMethodDataSourceDrivenTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/AsyncMethodDataSourceDrivenTests.Test.verified.txt
index 7cc93123c2..21dc9a469f 100644
--- a/TUnit.Core.SourceGenerator.Tests/AsyncMethodDataSourceDrivenTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/AsyncMethodDataSourceDrivenTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMethodDataSource_SingleValue__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AsyncMethodDataSourceDrivenTests>
         {
@@ -85,7 +85,7 @@ internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMe
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AsyncMethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AsyncMethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -107,8 +107,7 @@ internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMe
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -125,7 +124,7 @@ internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMe
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -150,7 +149,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMethodDataSource_Tuples__int_string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AsyncMethodDataSourceDrivenTests>
         {
@@ -235,7 +234,7 @@ internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMe
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AsyncMethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AsyncMethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -257,8 +256,7 @@ internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMe
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -275,7 +273,7 @@ internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMe
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -300,7 +298,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMethodDataSource_Enumerable__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AsyncMethodDataSourceDrivenTests>
         {
@@ -378,7 +376,7 @@ internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMe
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AsyncMethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AsyncMethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -400,8 +398,7 @@ internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMe
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -418,7 +415,7 @@ internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMe
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -443,7 +440,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMethodDataSource_Func__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AsyncMethodDataSourceDrivenTests>
         {
@@ -521,7 +518,7 @@ internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMe
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AsyncMethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AsyncMethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -543,8 +540,7 @@ internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMe
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -561,7 +557,7 @@ internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMe
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -586,7 +582,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMethodDataSource_WithArguments__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AsyncMethodDataSourceDrivenTests>
         {
@@ -664,7 +660,7 @@ internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMe
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AsyncMethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AsyncMethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -686,8 +682,7 @@ internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMe
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -704,7 +699,7 @@ internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMe
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -729,7 +724,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMethodDataSource_ExternalClass__string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AsyncMethodDataSourceDrivenTests>
         {
@@ -807,7 +802,7 @@ internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMe
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AsyncMethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AsyncMethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -829,8 +824,7 @@ internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMe
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -847,7 +841,7 @@ internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_AsyncMe
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -872,7 +866,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_ValueTaskMethodDataSource_SingleValue__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AsyncMethodDataSourceDrivenTests>
         {
@@ -950,7 +944,7 @@ internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_ValueTa
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AsyncMethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AsyncMethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -972,8 +966,7 @@ internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_ValueTa
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -990,7 +983,7 @@ internal sealed class TUnit_TestProject_AsyncMethodDataSourceDrivenTests_ValueTa
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/AttributeTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/AttributeTests.Test.verified.txt
index 7eca6abcb4..0421b1ffd6 100644
--- a/TUnit.Core.SourceGenerator.Tests/AttributeTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/AttributeTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AttributeTests_MyTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AttributeTests>
         {
@@ -63,7 +63,7 @@ internal sealed class TUnit_TestProject_AttributeTests_MyTest_TestSource : globa
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AttributeTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AttributeTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -78,8 +78,7 @@ internal sealed class TUnit_TestProject_AttributeTests_MyTest_TestSource : globa
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -96,7 +95,7 @@ internal sealed class TUnit_TestProject_AttributeTests_MyTest_TestSource : globa
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/BasicTests.Test.DotNet10_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/BasicTests.Test.DotNet10_0.verified.txt
index 8f646e8df3..3f1e5b2fcb 100644
--- a/TUnit.Core.SourceGenerator.Tests/BasicTests.Test.DotNet10_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/BasicTests.Test.DotNet10_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -66,8 +66,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -84,7 +83,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -109,7 +108,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -153,7 +152,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -167,8 +166,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -185,7 +183,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -210,7 +208,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -254,7 +252,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -268,8 +266,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -286,7 +283,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/BasicTests.Test.DotNet8_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/BasicTests.Test.DotNet8_0.verified.txt
index 8f646e8df3..3f1e5b2fcb 100644
--- a/TUnit.Core.SourceGenerator.Tests/BasicTests.Test.DotNet8_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/BasicTests.Test.DotNet8_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -66,8 +66,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -84,7 +83,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -109,7 +108,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -153,7 +152,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -167,8 +166,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -185,7 +183,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -210,7 +208,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -254,7 +252,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -268,8 +266,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -286,7 +283,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/BasicTests.Test.DotNet9_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/BasicTests.Test.DotNet9_0.verified.txt
index 8f646e8df3..3f1e5b2fcb 100644
--- a/TUnit.Core.SourceGenerator.Tests/BasicTests.Test.DotNet9_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/BasicTests.Test.DotNet9_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -66,8 +66,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -84,7 +83,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -109,7 +108,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -153,7 +152,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -167,8 +166,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -185,7 +183,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -210,7 +208,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -254,7 +252,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -268,8 +266,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -286,7 +283,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/BasicTests.Test.Net4_7.verified.txt b/TUnit.Core.SourceGenerator.Tests/BasicTests.Test.Net4_7.verified.txt
index 57a80528d1..1a37a733f3 100644
--- a/TUnit.Core.SourceGenerator.Tests/BasicTests.Test.Net4_7.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/BasicTests.Test.Net4_7.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -66,8 +66,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -84,7 +83,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -109,7 +108,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -153,7 +152,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -167,8 +166,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -185,7 +183,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -210,7 +208,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -254,7 +252,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -268,8 +266,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -286,7 +283,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/BeforeAllTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/BeforeAllTests.Test.verified.txt
index 81dd40abed..009aa1988c 100644
--- a/TUnit.Core.SourceGenerator.Tests/BeforeAllTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/BeforeAllTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BeforeTests_SetupTests_Test1_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BeforeTests.SetupTests>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_BeforeTests_SetupTests_Test1_TestSource
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BeforeTests.SetupTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BeforeTests.SetupTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -65,8 +65,7 @@ internal sealed class TUnit_TestProject_BeforeTests_SetupTests_Test1_TestSource
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -83,7 +82,7 @@ internal sealed class TUnit_TestProject_BeforeTests_SetupTests_Test1_TestSource
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -108,7 +107,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BeforeTests_SetupTests_Test2_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BeforeTests.SetupTests>
         {
@@ -152,7 +151,7 @@ internal sealed class TUnit_TestProject_BeforeTests_SetupTests_Test2_TestSource
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BeforeTests.SetupTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BeforeTests.SetupTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -166,8 +165,7 @@ internal sealed class TUnit_TestProject_BeforeTests_SetupTests_Test2_TestSource
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -184,7 +182,7 @@ internal sealed class TUnit_TestProject_BeforeTests_SetupTests_Test2_TestSource
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/BeforeTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/BeforeTests.Test.verified.txt
index 81dd40abed..009aa1988c 100644
--- a/TUnit.Core.SourceGenerator.Tests/BeforeTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/BeforeTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BeforeTests_SetupTests_Test1_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BeforeTests.SetupTests>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_BeforeTests_SetupTests_Test1_TestSource
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BeforeTests.SetupTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BeforeTests.SetupTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -65,8 +65,7 @@ internal sealed class TUnit_TestProject_BeforeTests_SetupTests_Test1_TestSource
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -83,7 +82,7 @@ internal sealed class TUnit_TestProject_BeforeTests_SetupTests_Test1_TestSource
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -108,7 +107,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BeforeTests_SetupTests_Test2_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BeforeTests.SetupTests>
         {
@@ -152,7 +151,7 @@ internal sealed class TUnit_TestProject_BeforeTests_SetupTests_Test2_TestSource
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BeforeTests.SetupTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BeforeTests.SetupTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -166,8 +165,7 @@ internal sealed class TUnit_TestProject_BeforeTests_SetupTests_Test2_TestSource
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -184,7 +182,7 @@ internal sealed class TUnit_TestProject_BeforeTests_SetupTests_Test2_TestSource
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Bugs2971NullableTypeTest.Test.DotNet10_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/Bugs2971NullableTypeTest.Test.DotNet10_0.verified.txt
index 59f9b93459..848ae53d1e 100644
--- a/TUnit.Core.SourceGenerator.Tests/Bugs2971NullableTypeTest.Test.DotNet10_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Bugs2971NullableTypeTest.Test.DotNet10_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__2971_Tests_SimpleTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._2971.Tests>
         {
@@ -52,7 +52,7 @@ internal sealed class TUnit_TestProject_Bugs__2971_Tests_SimpleTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._2971.Tests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._2971.Tests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -67,8 +67,7 @@ internal sealed class TUnit_TestProject_Bugs__2971_Tests_SimpleTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -85,7 +84,7 @@ internal sealed class TUnit_TestProject_Bugs__2971_Tests_SimpleTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Bugs2971NullableTypeTest.Test.DotNet8_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/Bugs2971NullableTypeTest.Test.DotNet8_0.verified.txt
index 59f9b93459..848ae53d1e 100644
--- a/TUnit.Core.SourceGenerator.Tests/Bugs2971NullableTypeTest.Test.DotNet8_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Bugs2971NullableTypeTest.Test.DotNet8_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__2971_Tests_SimpleTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._2971.Tests>
         {
@@ -52,7 +52,7 @@ internal sealed class TUnit_TestProject_Bugs__2971_Tests_SimpleTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._2971.Tests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._2971.Tests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -67,8 +67,7 @@ internal sealed class TUnit_TestProject_Bugs__2971_Tests_SimpleTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -85,7 +84,7 @@ internal sealed class TUnit_TestProject_Bugs__2971_Tests_SimpleTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Bugs2971NullableTypeTest.Test.DotNet9_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/Bugs2971NullableTypeTest.Test.DotNet9_0.verified.txt
index 59f9b93459..848ae53d1e 100644
--- a/TUnit.Core.SourceGenerator.Tests/Bugs2971NullableTypeTest.Test.DotNet9_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Bugs2971NullableTypeTest.Test.DotNet9_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__2971_Tests_SimpleTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._2971.Tests>
         {
@@ -52,7 +52,7 @@ internal sealed class TUnit_TestProject_Bugs__2971_Tests_SimpleTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._2971.Tests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._2971.Tests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -67,8 +67,7 @@ internal sealed class TUnit_TestProject_Bugs__2971_Tests_SimpleTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -85,7 +84,7 @@ internal sealed class TUnit_TestProject_Bugs__2971_Tests_SimpleTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Bugs2971NullableTypeTest.Test.Net4_7.verified.txt b/TUnit.Core.SourceGenerator.Tests/Bugs2971NullableTypeTest.Test.Net4_7.verified.txt
index 8421d3b61d..86af5fe29b 100644
--- a/TUnit.Core.SourceGenerator.Tests/Bugs2971NullableTypeTest.Test.Net4_7.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Bugs2971NullableTypeTest.Test.Net4_7.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__2971_Tests_SimpleTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._2971.Tests>
         {
@@ -52,7 +52,7 @@ internal sealed class TUnit_TestProject_Bugs__2971_Tests_SimpleTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._2971.Tests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._2971.Tests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -67,8 +67,7 @@ internal sealed class TUnit_TestProject_Bugs__2971_Tests_SimpleTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -85,7 +84,7 @@ internal sealed class TUnit_TestProject_Bugs__2971_Tests_SimpleTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ClassAndMethodArgumentsTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/ClassAndMethodArgumentsTests.Test.verified.txt
index 6545b68675..890d5a28e0 100644
--- a/TUnit.Core.SourceGenerator.Tests/ClassAndMethodArgumentsTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ClassAndMethodArgumentsTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ClassAndMethodArgumentsTests_Simple_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ClassAndMethodArgumentsTests>
         {
@@ -66,7 +66,7 @@ internal sealed class TUnit_TestProject_ClassAndMethodArgumentsTests_Simple_Test
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.ClassAndMethodArgumentsTests(global::TUnit.Core.Helpers.CastHelper.Cast<string>(args[0]));
             },
@@ -83,8 +83,7 @@ internal sealed class TUnit_TestProject_ClassAndMethodArgumentsTests_Simple_Test
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -101,7 +100,7 @@ internal sealed class TUnit_TestProject_ClassAndMethodArgumentsTests_Simple_Test
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -126,7 +125,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ClassAndMethodArgumentsTests_WithMethodLevel__string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ClassAndMethodArgumentsTests>
         {
@@ -198,7 +197,7 @@ internal sealed class TUnit_TestProject_ClassAndMethodArgumentsTests_WithMethodL
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.ClassAndMethodArgumentsTests(global::TUnit.Core.Helpers.CastHelper.Cast<string>(args[0]));
             },
@@ -223,8 +222,7 @@ internal sealed class TUnit_TestProject_ClassAndMethodArgumentsTests_WithMethodL
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -241,7 +239,7 @@ internal sealed class TUnit_TestProject_ClassAndMethodArgumentsTests_WithMethodL
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -266,7 +264,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ClassAndMethodArgumentsTests_IgnoreParameters__string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ClassAndMethodArgumentsTests>
         {
@@ -338,7 +336,7 @@ internal sealed class TUnit_TestProject_ClassAndMethodArgumentsTests_IgnoreParam
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.ClassAndMethodArgumentsTests(global::TUnit.Core.Helpers.CastHelper.Cast<string>(args[0]));
             },
@@ -363,8 +361,7 @@ internal sealed class TUnit_TestProject_ClassAndMethodArgumentsTests_IgnoreParam
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -381,7 +378,7 @@ internal sealed class TUnit_TestProject_ClassAndMethodArgumentsTests_IgnoreParam
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ClassConstructorTest.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/ClassConstructorTest.Test.verified.txt
index 04f2dca959..31c8d2d0a7 100644
--- a/TUnit.Core.SourceGenerator.Tests/ClassConstructorTest.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ClassConstructorTest.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ClassConstructorTest_Test_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ClassConstructorTest>
         {
@@ -79,7 +79,7 @@ internal sealed class TUnit_TestProject_ClassConstructorTest_Test_TestSource : g
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 // ClassConstructor attribute is present - instance creation handled at runtime
                 throw new global::System.NotSupportedException("Instance creation for classes with ClassConstructor attribute is handled at runtime");
@@ -98,8 +98,7 @@ internal sealed class TUnit_TestProject_ClassConstructorTest_Test_TestSource : g
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -116,7 +115,7 @@ internal sealed class TUnit_TestProject_ClassConstructorTest_Test_TestSource : g
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ClassDataSourceDrivenTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/ClassDataSourceDrivenTests.Test.verified.txt
index a4d2604ec3..489135d2dd 100644
--- a/TUnit.Core.SourceGenerator.Tests/ClassDataSourceDrivenTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ClassDataSourceDrivenTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_DataSource_Class__SomeAsyncDisposableClass_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ClassDataSourceDrivenTests>
         {
@@ -64,7 +64,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_DataSource_Cl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ClassDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ClassDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -87,8 +87,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_DataSource_Cl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -105,7 +104,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_DataSource_Cl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -130,7 +129,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_DataSource_Class_Generic__SomeAsyncDisposableClass_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ClassDataSourceDrivenTests>
         {
@@ -187,7 +186,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_DataSource_Cl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ClassDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ClassDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -210,8 +209,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_DataSource_Cl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -228,7 +226,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_DataSource_Cl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -253,7 +251,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_IsInitialized_With_1_ClassDataSource__Ini_01E5B4B7_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ClassDataSourceDrivenTests>
         {
@@ -310,7 +308,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_IsInitialized
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ClassDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ClassDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -332,8 +330,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_IsInitialized
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -350,7 +347,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_IsInitialized
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -375,7 +372,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_IsInitialized_With_2_ClassDataSources__In_52B92153_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ClassDataSourceDrivenTests>
         {
@@ -439,7 +436,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_IsInitialized
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ClassDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ClassDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -461,8 +458,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_IsInitialized
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -479,7 +475,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_IsInitialized
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -504,7 +500,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_IsInitialized_With_3_ClassDataSources__In_8432A34C_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ClassDataSourceDrivenTests>
         {
@@ -575,7 +571,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_IsInitialized
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ClassDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ClassDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -597,8 +593,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_IsInitialized
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -615,7 +610,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_IsInitialized
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -640,7 +635,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_IsInitialized_With_4_ClassDataSources__In_159CD9D1_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ClassDataSourceDrivenTests>
         {
@@ -718,7 +713,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_IsInitialized
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ClassDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ClassDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -740,8 +735,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_IsInitialized
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -758,7 +752,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_IsInitialized
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -783,7 +777,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_IsInitialized_With_5_ClassDataSources__In_CB437346_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ClassDataSourceDrivenTests>
         {
@@ -868,7 +862,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_IsInitialized
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ClassDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ClassDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -890,8 +884,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_IsInitialized
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -908,7 +901,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests_IsInitialized
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ClassDataSourceDrivenTests2.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/ClassDataSourceDrivenTests2.Test.verified.txt
index 7e4bd68c68..b8666db842 100644
--- a/TUnit.Core.SourceGenerator.Tests/ClassDataSourceDrivenTests2.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ClassDataSourceDrivenTests2.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests2_Base_Derived1_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ClassDataSourceDrivenTests2>
         {
@@ -67,7 +67,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests2_Base_Derived
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.ClassDataSourceDrivenTests2(global::TUnit.Core.Helpers.CastHelper.Cast<global::TUnit.TestProject.ClassDataSourceDrivenTests2.Base>(args[0]));
             },
@@ -85,8 +85,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests2_Base_Derived
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -103,7 +102,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests2_Base_Derived
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -128,7 +127,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests2_Base_Derived2_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ClassDataSourceDrivenTests2>
         {
@@ -188,7 +187,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests2_Base_Derived
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.ClassDataSourceDrivenTests2(global::TUnit.Core.Helpers.CastHelper.Cast<global::TUnit.TestProject.ClassDataSourceDrivenTests2.Base>(args[0]));
             },
@@ -206,8 +205,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests2_Base_Derived
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -224,7 +222,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTests2_Base_Derived
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ClassDataSourceDrivenTestsSharedKeyed.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/ClassDataSourceDrivenTestsSharedKeyed.Test.verified.txt
index 02d1a1c367..7349288d72 100644
--- a/TUnit.Core.SourceGenerator.Tests/ClassDataSourceDrivenTestsSharedKeyed.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ClassDataSourceDrivenTestsSharedKeyed.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ClassDataSourceDrivenTestsSharedKeyed_DataSource_Class__SomeAsyncDis_82F9A818_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ClassDataSourceDrivenTestsSharedKeyed>
         {
@@ -65,7 +65,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTestsSharedKeyed_Da
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ClassDataSourceDrivenTestsSharedKeyed(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ClassDataSourceDrivenTestsSharedKeyed(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -88,8 +88,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTestsSharedKeyed_Da
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -106,7 +105,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTestsSharedKeyed_Da
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -131,7 +130,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ClassDataSourceDrivenTestsSharedKeyed_DataSource_Class_Generic__Some_7FC73642_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ClassDataSourceDrivenTestsSharedKeyed>
         {
@@ -189,7 +188,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTestsSharedKeyed_Da
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ClassDataSourceDrivenTestsSharedKeyed(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ClassDataSourceDrivenTestsSharedKeyed(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -212,8 +211,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTestsSharedKeyed_Da
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -230,7 +228,7 @@ internal sealed class TUnit_TestProject_ClassDataSourceDrivenTestsSharedKeyed_Da
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ClassTupleDataSourceDrivenTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/ClassTupleDataSourceDrivenTests.Test.verified.txt
index 154c83218f..ca178e8615 100644
--- a/TUnit.Core.SourceGenerator.Tests/ClassTupleDataSourceDrivenTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ClassTupleDataSourceDrivenTests.Test.verified.txt
@@ -17,7 +17,7 @@ internal sealed class TUnit_TestProject_ClassTupleDataSourceDrivenTests_DataSour
     [global::System.Runtime.CompilerServices.UnsafeAccessor(global::System.Runtime.CompilerServices.UnsafeAccessorKind.Field, Name = "<Property4>k__BackingField")]
     private static extern ref global::System.ValueTuple<int, string, bool> GetProperty4BackingField(global::TUnit.TestProject.ClassTupleDataSourceDrivenTests instance);
     #endif
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ClassTupleDataSourceDrivenTests>
         {
@@ -349,7 +349,7 @@ internal sealed class TUnit_TestProject_ClassTupleDataSourceDrivenTests_DataSour
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.ClassTupleDataSourceDrivenTests(global::TUnit.Core.Helpers.CastHelper.Cast<int>(args[0]), global::TUnit.Core.Helpers.CastHelper.Cast<string>(args[1]), global::TUnit.Core.Helpers.CastHelper.Cast<bool>(args[2]))
                 {
@@ -381,8 +381,7 @@ internal sealed class TUnit_TestProject_ClassTupleDataSourceDrivenTests_DataSour
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -399,7 +398,7 @@ internal sealed class TUnit_TestProject_ClassTupleDataSourceDrivenTests_DataSour
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConcreteClassTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConcreteClassTests.Test.verified.txt
index 66defbf2bf..8aac896da7 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConcreteClassTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConcreteClassTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_SecondTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AbstractTests.ConcreteClass2>
         {
@@ -53,7 +53,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_SecondTest_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AbstractTests.ConcreteClass2(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AbstractTests.ConcreteClass2(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -68,8 +68,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_SecondTest_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -86,7 +85,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_SecondTest_
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -111,7 +110,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_AssertClassName_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AbstractTests.ConcreteClass2>
         {
@@ -157,7 +156,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_AssertClass
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AbstractTests.ConcreteClass2(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AbstractTests.ConcreteClass2(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -171,8 +170,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_AssertClass
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -189,7 +187,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_AssertClass
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -214,7 +212,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass1_AssertClassName_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AbstractTests.ConcreteClass1>
         {
@@ -259,7 +257,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass1_AssertClass
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AbstractTests.ConcreteClass1(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AbstractTests.ConcreteClass1(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -273,8 +271,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass1_AssertClass
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -291,7 +288,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass1_AssertClass
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.BasicTest_WithConflictingNamespace.DotNet10_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.BasicTest_WithConflictingNamespace.DotNet10_0.verified.txt
index 8f646e8df3..3f1e5b2fcb 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.BasicTest_WithConflictingNamespace.DotNet10_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.BasicTest_WithConflictingNamespace.DotNet10_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -66,8 +66,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -84,7 +83,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -109,7 +108,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -153,7 +152,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -167,8 +166,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -185,7 +183,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -210,7 +208,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -254,7 +252,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -268,8 +266,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -286,7 +283,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.BasicTest_WithConflictingNamespace.DotNet8_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.BasicTest_WithConflictingNamespace.DotNet8_0.verified.txt
index 8f646e8df3..3f1e5b2fcb 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.BasicTest_WithConflictingNamespace.DotNet8_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.BasicTest_WithConflictingNamespace.DotNet8_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -66,8 +66,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -84,7 +83,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -109,7 +108,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -153,7 +152,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -167,8 +166,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -185,7 +183,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -210,7 +208,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -254,7 +252,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -268,8 +266,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -286,7 +283,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.BasicTest_WithConflictingNamespace.DotNet9_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.BasicTest_WithConflictingNamespace.DotNet9_0.verified.txt
index 8f646e8df3..3f1e5b2fcb 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.BasicTest_WithConflictingNamespace.DotNet9_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.BasicTest_WithConflictingNamespace.DotNet9_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -66,8 +66,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -84,7 +83,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -109,7 +108,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -153,7 +152,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -167,8 +166,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -185,7 +183,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -210,7 +208,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -254,7 +252,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -268,8 +266,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -286,7 +283,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.BasicTest_WithConflictingNamespace.Net4_7.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.BasicTest_WithConflictingNamespace.Net4_7.verified.txt
index 57a80528d1..1a37a733f3 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.BasicTest_WithConflictingNamespace.Net4_7.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.BasicTest_WithConflictingNamespace.Net4_7.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -66,8 +66,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -84,7 +83,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -109,7 +108,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -153,7 +152,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -167,8 +166,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -185,7 +183,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -210,7 +208,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -254,7 +252,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -268,8 +266,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -286,7 +283,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.DataDrivenTest_WithConflictingNamespace.DotNet10_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.DataDrivenTest_WithConflictingNamespace.DotNet10_0.verified.txt
index 3992088a19..1f79ca1e5f 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.DataDrivenTest_WithConflictingNamespace.DotNet10_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.DataDrivenTest_WithConflictingNamespace.DotNet10_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -66,7 +66,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_T
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -89,8 +89,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_T
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -107,7 +106,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_T
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -132,7 +131,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -198,7 +197,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_s
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -221,8 +220,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_s
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -239,7 +237,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_s
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -264,7 +262,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_EnumValue__TestEnum_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -323,7 +321,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EnumValue__TestEnum_Test
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -346,8 +344,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EnumValue__TestEnum_Test
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -364,7 +361,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EnumValue__TestEnum_Test
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -389,7 +386,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_NullValue__string__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -446,7 +443,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NullValue__string__TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -469,8 +466,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NullValue__string__TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -487,7 +483,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NullValue__string__TestS
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -512,7 +508,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_EmptyString__string__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -569,7 +565,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EmptyString__string__Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -592,8 +588,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EmptyString__string__Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -610,7 +605,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EmptyString__string__Tes
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -635,7 +630,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_NonEmptyString__string__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -692,7 +687,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NonEmptyString__string__
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -715,8 +710,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NonEmptyString__string__
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -733,7 +727,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NonEmptyString__string__
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -758,7 +752,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_BooleanString__bool__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -817,7 +811,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_BooleanString__bool__Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -840,8 +834,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_BooleanString__bool__Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -858,7 +851,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_BooleanString__bool__Tes
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -883,7 +876,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_Type__Type_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -940,7 +933,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_Type__Type_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -963,8 +956,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_Type__Type_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -981,7 +973,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_Type__Type_TestSource :
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1006,7 +998,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_IntegerArray__int___TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -1063,7 +1055,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntegerArray__int___Test
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1086,8 +1078,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntegerArray__int___Test
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1104,7 +1095,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntegerArray__int___Test
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1129,7 +1120,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_IntMaxValue__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -1186,7 +1177,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntMaxValue__int_TestSou
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1209,8 +1200,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntMaxValue__int_TestSou
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1227,7 +1217,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntMaxValue__int_TestSou
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.DataDrivenTest_WithConflictingNamespace.DotNet8_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.DataDrivenTest_WithConflictingNamespace.DotNet8_0.verified.txt
index 3992088a19..1f79ca1e5f 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.DataDrivenTest_WithConflictingNamespace.DotNet8_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.DataDrivenTest_WithConflictingNamespace.DotNet8_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -66,7 +66,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_T
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -89,8 +89,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_T
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -107,7 +106,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_T
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -132,7 +131,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -198,7 +197,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_s
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -221,8 +220,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_s
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -239,7 +237,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_s
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -264,7 +262,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_EnumValue__TestEnum_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -323,7 +321,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EnumValue__TestEnum_Test
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -346,8 +344,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EnumValue__TestEnum_Test
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -364,7 +361,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EnumValue__TestEnum_Test
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -389,7 +386,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_NullValue__string__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -446,7 +443,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NullValue__string__TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -469,8 +466,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NullValue__string__TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -487,7 +483,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NullValue__string__TestS
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -512,7 +508,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_EmptyString__string__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -569,7 +565,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EmptyString__string__Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -592,8 +588,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EmptyString__string__Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -610,7 +605,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EmptyString__string__Tes
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -635,7 +630,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_NonEmptyString__string__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -692,7 +687,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NonEmptyString__string__
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -715,8 +710,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NonEmptyString__string__
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -733,7 +727,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NonEmptyString__string__
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -758,7 +752,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_BooleanString__bool__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -817,7 +811,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_BooleanString__bool__Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -840,8 +834,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_BooleanString__bool__Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -858,7 +851,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_BooleanString__bool__Tes
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -883,7 +876,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_Type__Type_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -940,7 +933,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_Type__Type_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -963,8 +956,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_Type__Type_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -981,7 +973,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_Type__Type_TestSource :
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1006,7 +998,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_IntegerArray__int___TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -1063,7 +1055,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntegerArray__int___Test
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1086,8 +1078,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntegerArray__int___Test
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1104,7 +1095,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntegerArray__int___Test
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1129,7 +1120,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_IntMaxValue__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -1186,7 +1177,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntMaxValue__int_TestSou
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1209,8 +1200,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntMaxValue__int_TestSou
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1227,7 +1217,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntMaxValue__int_TestSou
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.DataDrivenTest_WithConflictingNamespace.DotNet9_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.DataDrivenTest_WithConflictingNamespace.DotNet9_0.verified.txt
index 3992088a19..1f79ca1e5f 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.DataDrivenTest_WithConflictingNamespace.DotNet9_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.DataDrivenTest_WithConflictingNamespace.DotNet9_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -66,7 +66,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_T
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -89,8 +89,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_T
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -107,7 +106,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_T
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -132,7 +131,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -198,7 +197,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_s
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -221,8 +220,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_s
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -239,7 +237,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_s
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -264,7 +262,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_EnumValue__TestEnum_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -323,7 +321,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EnumValue__TestEnum_Test
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -346,8 +344,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EnumValue__TestEnum_Test
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -364,7 +361,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EnumValue__TestEnum_Test
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -389,7 +386,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_NullValue__string__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -446,7 +443,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NullValue__string__TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -469,8 +466,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NullValue__string__TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -487,7 +483,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NullValue__string__TestS
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -512,7 +508,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_EmptyString__string__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -569,7 +565,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EmptyString__string__Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -592,8 +588,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EmptyString__string__Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -610,7 +605,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EmptyString__string__Tes
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -635,7 +630,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_NonEmptyString__string__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -692,7 +687,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NonEmptyString__string__
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -715,8 +710,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NonEmptyString__string__
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -733,7 +727,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NonEmptyString__string__
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -758,7 +752,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_BooleanString__bool__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -817,7 +811,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_BooleanString__bool__Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -840,8 +834,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_BooleanString__bool__Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -858,7 +851,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_BooleanString__bool__Tes
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -883,7 +876,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_Type__Type_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -940,7 +933,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_Type__Type_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -963,8 +956,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_Type__Type_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -981,7 +973,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_Type__Type_TestSource :
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1006,7 +998,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_IntegerArray__int___TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -1063,7 +1055,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntegerArray__int___Test
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1086,8 +1078,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntegerArray__int___Test
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1104,7 +1095,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntegerArray__int___Test
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1129,7 +1120,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_IntMaxValue__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -1186,7 +1177,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntMaxValue__int_TestSou
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1209,8 +1200,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntMaxValue__int_TestSou
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1227,7 +1217,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntMaxValue__int_TestSou
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.DataDrivenTest_WithConflictingNamespace.Net4_7.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.DataDrivenTest_WithConflictingNamespace.Net4_7.verified.txt
index 6c94c4e39b..a342948bb1 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.DataDrivenTest_WithConflictingNamespace.Net4_7.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.DataDrivenTest_WithConflictingNamespace.Net4_7.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -66,7 +66,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_T
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -89,8 +89,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_T
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -107,7 +106,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_T
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -132,7 +131,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -198,7 +197,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_s
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -221,8 +220,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_s
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -239,7 +237,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_s
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -264,7 +262,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_EnumValue__TestEnum_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -323,7 +321,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EnumValue__TestEnum_Test
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -346,8 +344,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EnumValue__TestEnum_Test
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -364,7 +361,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EnumValue__TestEnum_Test
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -389,7 +386,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_NullValue__string__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -446,7 +443,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NullValue__string__TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -469,8 +466,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NullValue__string__TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -487,7 +483,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NullValue__string__TestS
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -512,7 +508,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_EmptyString__string__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -569,7 +565,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EmptyString__string__Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -592,8 +588,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EmptyString__string__Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -610,7 +605,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EmptyString__string__Tes
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -635,7 +630,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_NonEmptyString__string__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -692,7 +687,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NonEmptyString__string__
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -715,8 +710,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NonEmptyString__string__
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -733,7 +727,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NonEmptyString__string__
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -758,7 +752,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_BooleanString__bool__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -817,7 +811,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_BooleanString__bool__Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -840,8 +834,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_BooleanString__bool__Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -858,7 +851,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_BooleanString__bool__Tes
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -883,7 +876,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_Type__Type_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -940,7 +933,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_Type__Type_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -963,8 +956,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_Type__Type_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -981,7 +973,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_Type__Type_TestSource :
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1006,7 +998,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_IntegerArray__int___TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -1063,7 +1055,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntegerArray__int___Test
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1086,8 +1078,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntegerArray__int___Test
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1104,7 +1095,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntegerArray__int___Test
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1129,7 +1120,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_IntMaxValue__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -1186,7 +1177,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntMaxValue__int_TestSou
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1209,8 +1200,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntMaxValue__int_TestSou
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1227,7 +1217,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntMaxValue__int_TestSou
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MatrixTest_WithConflictingNamespace.DotNet10_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MatrixTest_WithConflictingNamespace.DotNet10_0.verified.txt
index aed83e58e3..02f4777aa0 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MatrixTest_WithConflictingNamespace.DotNet10_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MatrixTest_WithConflictingNamespace.DotNet10_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_One__string_int_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -78,7 +78,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_One__string_int_b
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -100,8 +100,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_One__string_int_b
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -118,7 +117,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_One__string_int_b
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -143,7 +142,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Two__int_int_int_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -221,7 +220,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Two__int_int_int_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -243,8 +242,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Two__int_int_int_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -261,7 +259,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Two__int_int_int_
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -286,7 +284,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Enum__int_TestEnum_TestEnum__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -357,7 +355,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Enum__int_TestEnu
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -379,8 +377,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Enum__int_TestEnu
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -397,7 +394,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Enum__int_TestEnu
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -422,7 +419,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools__string_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -486,7 +483,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools__string_bo
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -508,8 +505,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools__string_bo
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -526,7 +522,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools__string_bo
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -551,7 +547,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools2__string_bool__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -615,7 +611,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools2__string_b
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -637,8 +633,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools2__string_b
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -655,7 +650,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools2__string_b
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -680,7 +675,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_ImplicitConversion__OneOf_TestEnum__TestEnum2__bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -744,7 +739,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ImplicitConversion__OneOf_Te
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -766,8 +761,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ImplicitConversion__OneOf_Te
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -784,7 +778,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ImplicitConversion__OneOf_Te
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -809,7 +803,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_ExcludingAutoGeneratedMatrixValues__CountToTenEnum_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -873,7 +867,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ExcludingAutoGeneratedMatrix
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -895,8 +889,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ExcludingAutoGeneratedMatrix
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -913,7 +906,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ExcludingAutoGeneratedMatrix
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -938,7 +931,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Method1__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -995,7 +988,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method1__int_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1017,8 +1010,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method1__int_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1035,7 +1027,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method1__int_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1060,7 +1052,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Method2__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1117,7 +1109,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method2__int_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1139,8 +1131,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method2__int_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1157,7 +1148,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method2__int_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1182,7 +1173,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Method3__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1239,7 +1230,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method3__int_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1261,8 +1252,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method3__int_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1279,7 +1269,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method3__int_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1304,7 +1294,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Method4__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1361,7 +1351,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method4__int_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1383,8 +1373,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method4__int_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1401,7 +1390,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method4__int_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1426,7 +1415,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Exclusion__int_int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1493,7 +1482,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Exclusion__int_int_TestSourc
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1515,8 +1504,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Exclusion__int_int_TestSourc
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1533,7 +1521,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Exclusion__int_int_TestSourc
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1558,7 +1546,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_MatrixMethod_WithEnumParameter_UsesOnlyMethodValues__boo_38BEEE8F_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1622,7 +1610,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixMethod_WithEnumParamet
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1644,8 +1632,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixMethod_WithEnumParamet
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1662,7 +1649,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixMethod_WithEnumParamet
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MatrixTest_WithConflictingNamespace.DotNet8_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MatrixTest_WithConflictingNamespace.DotNet8_0.verified.txt
index aed83e58e3..02f4777aa0 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MatrixTest_WithConflictingNamespace.DotNet8_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MatrixTest_WithConflictingNamespace.DotNet8_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_One__string_int_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -78,7 +78,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_One__string_int_b
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -100,8 +100,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_One__string_int_b
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -118,7 +117,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_One__string_int_b
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -143,7 +142,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Two__int_int_int_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -221,7 +220,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Two__int_int_int_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -243,8 +242,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Two__int_int_int_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -261,7 +259,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Two__int_int_int_
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -286,7 +284,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Enum__int_TestEnum_TestEnum__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -357,7 +355,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Enum__int_TestEnu
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -379,8 +377,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Enum__int_TestEnu
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -397,7 +394,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Enum__int_TestEnu
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -422,7 +419,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools__string_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -486,7 +483,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools__string_bo
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -508,8 +505,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools__string_bo
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -526,7 +522,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools__string_bo
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -551,7 +547,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools2__string_bool__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -615,7 +611,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools2__string_b
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -637,8 +633,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools2__string_b
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -655,7 +650,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools2__string_b
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -680,7 +675,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_ImplicitConversion__OneOf_TestEnum__TestEnum2__bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -744,7 +739,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ImplicitConversion__OneOf_Te
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -766,8 +761,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ImplicitConversion__OneOf_Te
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -784,7 +778,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ImplicitConversion__OneOf_Te
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -809,7 +803,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_ExcludingAutoGeneratedMatrixValues__CountToTenEnum_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -873,7 +867,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ExcludingAutoGeneratedMatrix
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -895,8 +889,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ExcludingAutoGeneratedMatrix
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -913,7 +906,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ExcludingAutoGeneratedMatrix
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -938,7 +931,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Method1__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -995,7 +988,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method1__int_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1017,8 +1010,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method1__int_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1035,7 +1027,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method1__int_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1060,7 +1052,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Method2__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1117,7 +1109,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method2__int_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1139,8 +1131,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method2__int_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1157,7 +1148,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method2__int_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1182,7 +1173,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Method3__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1239,7 +1230,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method3__int_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1261,8 +1252,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method3__int_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1279,7 +1269,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method3__int_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1304,7 +1294,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Method4__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1361,7 +1351,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method4__int_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1383,8 +1373,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method4__int_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1401,7 +1390,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method4__int_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1426,7 +1415,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Exclusion__int_int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1493,7 +1482,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Exclusion__int_int_TestSourc
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1515,8 +1504,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Exclusion__int_int_TestSourc
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1533,7 +1521,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Exclusion__int_int_TestSourc
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1558,7 +1546,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_MatrixMethod_WithEnumParameter_UsesOnlyMethodValues__boo_38BEEE8F_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1622,7 +1610,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixMethod_WithEnumParamet
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1644,8 +1632,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixMethod_WithEnumParamet
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1662,7 +1649,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixMethod_WithEnumParamet
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MatrixTest_WithConflictingNamespace.DotNet9_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MatrixTest_WithConflictingNamespace.DotNet9_0.verified.txt
index aed83e58e3..02f4777aa0 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MatrixTest_WithConflictingNamespace.DotNet9_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MatrixTest_WithConflictingNamespace.DotNet9_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_One__string_int_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -78,7 +78,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_One__string_int_b
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -100,8 +100,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_One__string_int_b
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -118,7 +117,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_One__string_int_b
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -143,7 +142,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Two__int_int_int_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -221,7 +220,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Two__int_int_int_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -243,8 +242,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Two__int_int_int_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -261,7 +259,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Two__int_int_int_
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -286,7 +284,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Enum__int_TestEnum_TestEnum__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -357,7 +355,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Enum__int_TestEnu
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -379,8 +377,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Enum__int_TestEnu
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -397,7 +394,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Enum__int_TestEnu
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -422,7 +419,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools__string_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -486,7 +483,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools__string_bo
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -508,8 +505,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools__string_bo
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -526,7 +522,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools__string_bo
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -551,7 +547,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools2__string_bool__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -615,7 +611,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools2__string_b
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -637,8 +633,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools2__string_b
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -655,7 +650,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools2__string_b
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -680,7 +675,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_ImplicitConversion__OneOf_TestEnum__TestEnum2__bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -744,7 +739,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ImplicitConversion__OneOf_Te
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -766,8 +761,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ImplicitConversion__OneOf_Te
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -784,7 +778,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ImplicitConversion__OneOf_Te
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -809,7 +803,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_ExcludingAutoGeneratedMatrixValues__CountToTenEnum_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -873,7 +867,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ExcludingAutoGeneratedMatrix
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -895,8 +889,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ExcludingAutoGeneratedMatrix
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -913,7 +906,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ExcludingAutoGeneratedMatrix
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -938,7 +931,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Method1__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -995,7 +988,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method1__int_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1017,8 +1010,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method1__int_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1035,7 +1027,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method1__int_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1060,7 +1052,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Method2__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1117,7 +1109,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method2__int_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1139,8 +1131,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method2__int_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1157,7 +1148,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method2__int_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1182,7 +1173,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Method3__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1239,7 +1230,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method3__int_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1261,8 +1252,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method3__int_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1279,7 +1269,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method3__int_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1304,7 +1294,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Method4__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1361,7 +1351,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method4__int_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1383,8 +1373,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method4__int_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1401,7 +1390,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method4__int_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1426,7 +1415,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Exclusion__int_int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1493,7 +1482,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Exclusion__int_int_TestSourc
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1515,8 +1504,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Exclusion__int_int_TestSourc
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1533,7 +1521,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Exclusion__int_int_TestSourc
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1558,7 +1546,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_MatrixMethod_WithEnumParameter_UsesOnlyMethodValues__boo_38BEEE8F_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1622,7 +1610,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixMethod_WithEnumParamet
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1644,8 +1632,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixMethod_WithEnumParamet
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1662,7 +1649,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixMethod_WithEnumParamet
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MatrixTest_WithConflictingNamespace.Net4_7.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MatrixTest_WithConflictingNamespace.Net4_7.verified.txt
index 9d3b3b6d00..664d214195 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MatrixTest_WithConflictingNamespace.Net4_7.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MatrixTest_WithConflictingNamespace.Net4_7.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_One__string_int_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -78,7 +78,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_One__string_int_b
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -100,8 +100,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_One__string_int_b
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -118,7 +117,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_One__string_int_b
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -143,7 +142,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Two__int_int_int_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -221,7 +220,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Two__int_int_int_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -243,8 +242,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Two__int_int_int_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -261,7 +259,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Two__int_int_int_
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -286,7 +284,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Enum__int_TestEnum_TestEnum__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -357,7 +355,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Enum__int_TestEnu
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -379,8 +377,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Enum__int_TestEnu
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -397,7 +394,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Enum__int_TestEnu
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -422,7 +419,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools__string_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -486,7 +483,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools__string_bo
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -508,8 +505,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools__string_bo
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -526,7 +522,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools__string_bo
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -551,7 +547,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools2__string_bool__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -615,7 +611,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools2__string_b
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -637,8 +633,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools2__string_b
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -655,7 +650,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools2__string_b
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -680,7 +675,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_ImplicitConversion__OneOf_TestEnum__TestEnum2__bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -744,7 +739,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ImplicitConversion__OneOf_Te
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -766,8 +761,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ImplicitConversion__OneOf_Te
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -784,7 +778,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ImplicitConversion__OneOf_Te
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -809,7 +803,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_ExcludingAutoGeneratedMatrixValues__CountToTenEnum_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -873,7 +867,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ExcludingAutoGeneratedMatrix
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -895,8 +889,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ExcludingAutoGeneratedMatrix
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -913,7 +906,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ExcludingAutoGeneratedMatrix
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -938,7 +931,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Method1__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -995,7 +988,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method1__int_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1017,8 +1010,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method1__int_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1035,7 +1027,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method1__int_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1060,7 +1052,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Method2__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1117,7 +1109,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method2__int_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1139,8 +1131,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method2__int_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1157,7 +1148,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method2__int_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1182,7 +1173,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Method3__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1239,7 +1230,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method3__int_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1261,8 +1252,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method3__int_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1279,7 +1269,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method3__int_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1304,7 +1294,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Method4__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1361,7 +1351,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method4__int_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1383,8 +1373,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method4__int_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1401,7 +1390,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method4__int_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1426,7 +1415,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Exclusion__int_int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1493,7 +1482,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Exclusion__int_int_TestSourc
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1515,8 +1504,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Exclusion__int_int_TestSourc
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1533,7 +1521,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Exclusion__int_int_TestSourc
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1558,7 +1546,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_MatrixMethod_WithEnumParameter_UsesOnlyMethodValues__boo_38BEEE8F_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1622,7 +1610,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixMethod_WithEnumParamet
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1644,8 +1632,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixMethod_WithEnumParamet
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1662,7 +1649,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixMethod_WithEnumParamet
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MethodDataSource_WithConflictingNamespace.DotNet10_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MethodDataSource_WithConflictingNamespace.DotNet10_0.verified.txt
index e736239c19..39f104fc47 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MethodDataSource_WithConflictingNamespace.DotNet10_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MethodDataSource_WithConflictingNamespace.DotNet10_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -75,7 +75,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -98,8 +98,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -116,7 +115,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -141,7 +140,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method2__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -209,7 +208,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -232,8 +231,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -250,7 +248,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -275,7 +273,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method_WithAction__Action_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -343,7 +341,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -366,8 +364,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -384,7 +381,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -409,7 +406,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method3__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -492,7 +489,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -515,8 +512,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -533,7 +529,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -558,7 +554,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method4__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -668,7 +664,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -691,8 +687,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -709,7 +704,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -734,7 +729,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_WithBaseReturn__BaseValue_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -802,7 +797,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_W
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -825,8 +820,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_W
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -843,7 +837,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_W
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -868,7 +862,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_EnumerableFuncArrayTest__string___TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -946,7 +940,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_EnumerableFu
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -968,8 +962,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_EnumerableFu
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -986,7 +979,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_EnumerableFu
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MethodDataSource_WithConflictingNamespace.DotNet8_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MethodDataSource_WithConflictingNamespace.DotNet8_0.verified.txt
index e736239c19..39f104fc47 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MethodDataSource_WithConflictingNamespace.DotNet8_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MethodDataSource_WithConflictingNamespace.DotNet8_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -75,7 +75,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -98,8 +98,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -116,7 +115,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -141,7 +140,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method2__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -209,7 +208,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -232,8 +231,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -250,7 +248,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -275,7 +273,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method_WithAction__Action_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -343,7 +341,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -366,8 +364,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -384,7 +381,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -409,7 +406,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method3__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -492,7 +489,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -515,8 +512,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -533,7 +529,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -558,7 +554,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method4__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -668,7 +664,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -691,8 +687,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -709,7 +704,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -734,7 +729,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_WithBaseReturn__BaseValue_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -802,7 +797,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_W
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -825,8 +820,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_W
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -843,7 +837,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_W
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -868,7 +862,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_EnumerableFuncArrayTest__string___TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -946,7 +940,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_EnumerableFu
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -968,8 +962,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_EnumerableFu
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -986,7 +979,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_EnumerableFu
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MethodDataSource_WithConflictingNamespace.DotNet9_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MethodDataSource_WithConflictingNamespace.DotNet9_0.verified.txt
index e736239c19..39f104fc47 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MethodDataSource_WithConflictingNamespace.DotNet9_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MethodDataSource_WithConflictingNamespace.DotNet9_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -75,7 +75,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -98,8 +98,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -116,7 +115,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -141,7 +140,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method2__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -209,7 +208,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -232,8 +231,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -250,7 +248,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -275,7 +273,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method_WithAction__Action_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -343,7 +341,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -366,8 +364,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -384,7 +381,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -409,7 +406,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method3__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -492,7 +489,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -515,8 +512,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -533,7 +529,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -558,7 +554,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method4__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -668,7 +664,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -691,8 +687,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -709,7 +704,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -734,7 +729,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_WithBaseReturn__BaseValue_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -802,7 +797,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_W
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -825,8 +820,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_W
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -843,7 +837,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_W
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -868,7 +862,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_EnumerableFuncArrayTest__string___TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -946,7 +940,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_EnumerableFu
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -968,8 +962,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_EnumerableFu
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -986,7 +979,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_EnumerableFu
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MethodDataSource_WithConflictingNamespace.Net4_7.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MethodDataSource_WithConflictingNamespace.Net4_7.verified.txt
index 08e224c9c6..c265ac1e49 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MethodDataSource_WithConflictingNamespace.Net4_7.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.MethodDataSource_WithConflictingNamespace.Net4_7.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -75,7 +75,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -98,8 +98,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -116,7 +115,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -141,7 +140,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method2__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -209,7 +208,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -232,8 +231,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -250,7 +248,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -275,7 +273,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method_WithAction__Action_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -343,7 +341,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -366,8 +364,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -384,7 +381,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -409,7 +406,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method3__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -492,7 +489,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -515,8 +512,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -533,7 +529,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -558,7 +554,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method4__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -668,7 +664,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -691,8 +687,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -709,7 +704,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -734,7 +729,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_WithBaseReturn__BaseValue_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -802,7 +797,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_W
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -825,8 +820,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_W
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -843,7 +837,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_W
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -868,7 +862,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_EnumerableFuncArrayTest__string___TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -946,7 +940,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_EnumerableFu
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -968,8 +962,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_EnumerableFu
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -986,7 +979,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_EnumerableFu
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.TupleDataSource_WithConflictingNamespace.DotNet10_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.TupleDataSource_WithConflictingNamespace.DotNet10_0.verified.txt
index ccf119c861..80318b84bc 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.TupleDataSource_WithConflictingNamespace.DotNet10_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.TupleDataSource_WithConflictingNamespace.DotNet10_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_TupleDataSourceDrivenTests_DataSource_TupleMethod__int_string_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.TupleDataSourceDrivenTests>
         {
@@ -89,7 +89,7 @@ internal sealed class TUnit_TestProject_TupleDataSourceDrivenTests_DataSource_Tu
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.TupleDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.TupleDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -112,8 +112,7 @@ internal sealed class TUnit_TestProject_TupleDataSourceDrivenTests_DataSource_Tu
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -130,7 +129,7 @@ internal sealed class TUnit_TestProject_TupleDataSourceDrivenTests_DataSource_Tu
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.TupleDataSource_WithConflictingNamespace.DotNet8_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.TupleDataSource_WithConflictingNamespace.DotNet8_0.verified.txt
index ccf119c861..80318b84bc 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.TupleDataSource_WithConflictingNamespace.DotNet8_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.TupleDataSource_WithConflictingNamespace.DotNet8_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_TupleDataSourceDrivenTests_DataSource_TupleMethod__int_string_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.TupleDataSourceDrivenTests>
         {
@@ -89,7 +89,7 @@ internal sealed class TUnit_TestProject_TupleDataSourceDrivenTests_DataSource_Tu
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.TupleDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.TupleDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -112,8 +112,7 @@ internal sealed class TUnit_TestProject_TupleDataSourceDrivenTests_DataSource_Tu
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -130,7 +129,7 @@ internal sealed class TUnit_TestProject_TupleDataSourceDrivenTests_DataSource_Tu
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.TupleDataSource_WithConflictingNamespace.DotNet9_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.TupleDataSource_WithConflictingNamespace.DotNet9_0.verified.txt
index ccf119c861..80318b84bc 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.TupleDataSource_WithConflictingNamespace.DotNet9_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.TupleDataSource_WithConflictingNamespace.DotNet9_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_TupleDataSourceDrivenTests_DataSource_TupleMethod__int_string_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.TupleDataSourceDrivenTests>
         {
@@ -89,7 +89,7 @@ internal sealed class TUnit_TestProject_TupleDataSourceDrivenTests_DataSource_Tu
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.TupleDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.TupleDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -112,8 +112,7 @@ internal sealed class TUnit_TestProject_TupleDataSourceDrivenTests_DataSource_Tu
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -130,7 +129,7 @@ internal sealed class TUnit_TestProject_TupleDataSourceDrivenTests_DataSource_Tu
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.TupleDataSource_WithConflictingNamespace.Net4_7.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.TupleDataSource_WithConflictingNamespace.Net4_7.verified.txt
index 17e30917c6..b647e7abe2 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.TupleDataSource_WithConflictingNamespace.Net4_7.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConflictingNamespaceTests.TupleDataSource_WithConflictingNamespace.Net4_7.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_TupleDataSourceDrivenTests_DataSource_TupleMethod__int_string_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.TupleDataSourceDrivenTests>
         {
@@ -89,7 +89,7 @@ internal sealed class TUnit_TestProject_TupleDataSourceDrivenTests_DataSource_Tu
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.TupleDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.TupleDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -112,8 +112,7 @@ internal sealed class TUnit_TestProject_TupleDataSourceDrivenTests_DataSource_Tu
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -130,7 +129,7 @@ internal sealed class TUnit_TestProject_TupleDataSourceDrivenTests_DataSource_Tu
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConstantArgumentsTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConstantArgumentsTests.Test.verified.txt
index 9468e3d4b9..c31ef96e6c 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConstantArgumentsTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConstantArgumentsTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ConstantArgumentsTests_String1__string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ConstantArgumentsTests>
         {
@@ -64,7 +64,7 @@ internal sealed class TUnit_TestProject_ConstantArgumentsTests_String1__string_T
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ConstantArgumentsTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ConstantArgumentsTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -86,8 +86,7 @@ internal sealed class TUnit_TestProject_ConstantArgumentsTests_String1__string_T
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -104,7 +103,7 @@ internal sealed class TUnit_TestProject_ConstantArgumentsTests_String1__string_T
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -129,7 +128,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ConstantArgumentsTests_Int__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ConstantArgumentsTests>
         {
@@ -186,7 +185,7 @@ internal sealed class TUnit_TestProject_ConstantArgumentsTests_Int__int_TestSour
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ConstantArgumentsTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ConstantArgumentsTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -208,8 +207,7 @@ internal sealed class TUnit_TestProject_ConstantArgumentsTests_Int__int_TestSour
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -226,7 +224,7 @@ internal sealed class TUnit_TestProject_ConstantArgumentsTests_Int__int_TestSour
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -251,7 +249,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ConstantArgumentsTests_Double__double_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ConstantArgumentsTests>
         {
@@ -308,7 +306,7 @@ internal sealed class TUnit_TestProject_ConstantArgumentsTests_Double__double_Te
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ConstantArgumentsTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ConstantArgumentsTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -330,8 +328,7 @@ internal sealed class TUnit_TestProject_ConstantArgumentsTests_Double__double_Te
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -348,7 +345,7 @@ internal sealed class TUnit_TestProject_ConstantArgumentsTests_Double__double_Te
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -373,7 +370,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ConstantArgumentsTests_Float__float_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ConstantArgumentsTests>
         {
@@ -430,7 +427,7 @@ internal sealed class TUnit_TestProject_ConstantArgumentsTests_Float__float_Test
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ConstantArgumentsTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ConstantArgumentsTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -452,8 +449,7 @@ internal sealed class TUnit_TestProject_ConstantArgumentsTests_Float__float_Test
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -470,7 +466,7 @@ internal sealed class TUnit_TestProject_ConstantArgumentsTests_Float__float_Test
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -495,7 +491,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ConstantArgumentsTests_Long__long_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ConstantArgumentsTests>
         {
@@ -552,7 +548,7 @@ internal sealed class TUnit_TestProject_ConstantArgumentsTests_Long__long_TestSo
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ConstantArgumentsTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ConstantArgumentsTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -574,8 +570,7 @@ internal sealed class TUnit_TestProject_ConstantArgumentsTests_Long__long_TestSo
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -592,7 +587,7 @@ internal sealed class TUnit_TestProject_ConstantArgumentsTests_Long__long_TestSo
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -617,7 +612,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ConstantArgumentsTests_UInt__uint_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ConstantArgumentsTests>
         {
@@ -674,7 +669,7 @@ internal sealed class TUnit_TestProject_ConstantArgumentsTests_UInt__uint_TestSo
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ConstantArgumentsTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ConstantArgumentsTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -696,8 +691,7 @@ internal sealed class TUnit_TestProject_ConstantArgumentsTests_UInt__uint_TestSo
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -714,7 +708,7 @@ internal sealed class TUnit_TestProject_ConstantArgumentsTests_UInt__uint_TestSo
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -739,7 +733,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ConstantArgumentsTests_ULong__ulong_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ConstantArgumentsTests>
         {
@@ -796,7 +790,7 @@ internal sealed class TUnit_TestProject_ConstantArgumentsTests_ULong__ulong_Test
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ConstantArgumentsTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ConstantArgumentsTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -818,8 +812,7 @@ internal sealed class TUnit_TestProject_ConstantArgumentsTests_ULong__ulong_Test
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -836,7 +829,7 @@ internal sealed class TUnit_TestProject_ConstantArgumentsTests_ULong__ulong_Test
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConstantInBaseClassTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConstantInBaseClassTests.Test.verified.txt
index 1ecb10a0ce..5433a00830 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConstantInBaseClassTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConstantInBaseClassTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1432_ConstantInBaseClassTests_SomeTest__string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1432.ConstantInBaseClassTests>
         {
@@ -64,7 +64,7 @@ internal sealed class TUnit_TestProject_Bugs__1432_ConstantInBaseClassTests_Some
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1432.ConstantInBaseClassTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1432.ConstantInBaseClassTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -86,8 +86,7 @@ internal sealed class TUnit_TestProject_Bugs__1432_ConstantInBaseClassTests_Some
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -104,7 +103,7 @@ internal sealed class TUnit_TestProject_Bugs__1432_ConstantInBaseClassTests_Some
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ConstantsInInterpolatedStringsTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/ConstantsInInterpolatedStringsTests.Test.verified.txt
index 2277beb63b..cf2290fcc7 100644
--- a/TUnit.Core.SourceGenerator.Tests/ConstantsInInterpolatedStringsTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ConstantsInInterpolatedStringsTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1432_ConstantsInInterpolatedStringsTests_SomeTest__string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1432.ConstantsInInterpolatedStringsTests>
         {
@@ -64,7 +64,7 @@ internal sealed class TUnit_TestProject_Bugs__1432_ConstantsInInterpolatedString
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1432.ConstantsInInterpolatedStringsTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1432.ConstantsInInterpolatedStringsTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -86,8 +86,7 @@ internal sealed class TUnit_TestProject_Bugs__1432_ConstantsInInterpolatedString
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -104,7 +103,7 @@ internal sealed class TUnit_TestProject_Bugs__1432_ConstantsInInterpolatedString
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/CustomDisplayNameTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/CustomDisplayNameTests.Test.verified.txt
index e5542cd201..9b3955c677 100644
--- a/TUnit.Core.SourceGenerator.Tests/CustomDisplayNameTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/CustomDisplayNameTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_CustomDisplayNameTests_Test_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.CustomDisplayNameTests>
         {
@@ -71,7 +71,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_Test_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.CustomDisplayNameTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.CustomDisplayNameTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -85,8 +85,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_Test_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -103,7 +102,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_Test_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -128,7 +127,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_CustomDisplayNameTests_Test2_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.CustomDisplayNameTests>
         {
@@ -192,7 +191,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_Test2_TestSource
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.CustomDisplayNameTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.CustomDisplayNameTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -206,8 +205,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_Test2_TestSource
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -224,7 +222,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_Test2_TestSource
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -249,7 +247,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_CustomDisplayNameTests_Test3__string_int_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.CustomDisplayNameTests>
         {
@@ -340,7 +338,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_Test3__string_int
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.CustomDisplayNameTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.CustomDisplayNameTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -362,8 +360,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_Test3__string_int
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -380,7 +377,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_Test3__string_int
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -405,7 +402,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_CustomDisplayNameTests_MethodDataSourceTest__string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.CustomDisplayNameTests>
         {
@@ -492,7 +489,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_MethodDataSourceT
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.CustomDisplayNameTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.CustomDisplayNameTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -514,8 +511,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_MethodDataSourceT
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -532,7 +528,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_MethodDataSourceT
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -557,7 +553,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_CustomDisplayNameTests_TestParameterNamePrefixBug__int_string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.CustomDisplayNameTests>
         {
@@ -642,7 +638,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_TestParameterName
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.CustomDisplayNameTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.CustomDisplayNameTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -664,8 +660,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_TestParameterName
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -682,7 +677,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_TestParameterName
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -707,7 +702,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_CustomDisplayNameTests_PasswordTest__string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.CustomDisplayNameTests>
         {
@@ -782,7 +777,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_PasswordTest__str
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.CustomDisplayNameTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.CustomDisplayNameTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -804,8 +799,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_PasswordTest__str
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -822,7 +816,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_PasswordTest__str
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -847,7 +841,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_CustomDisplayNameTests_SameClassConstantTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.CustomDisplayNameTests>
         {
@@ -911,7 +905,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_SameClassConstant
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.CustomDisplayNameTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.CustomDisplayNameTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -925,8 +919,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_SameClassConstant
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -943,7 +936,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_SameClassConstant
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -968,7 +961,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_CustomDisplayNameTests_DifferentClassConstantTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.CustomDisplayNameTests>
         {
@@ -1032,7 +1025,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_DifferentClassCon
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.CustomDisplayNameTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.CustomDisplayNameTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1046,8 +1039,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_DifferentClassCon
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1064,7 +1056,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_DifferentClassCon
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1089,7 +1081,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_CustomDisplayNameTests_NestedClassConstantTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.CustomDisplayNameTests>
         {
@@ -1153,7 +1145,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_NestedClassConsta
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.CustomDisplayNameTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.CustomDisplayNameTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1167,8 +1159,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_NestedClassConsta
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1185,7 +1176,7 @@ internal sealed class TUnit_TestProject_CustomDisplayNameTests_NestedClassConsta
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/DataDrivenTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/DataDrivenTests.Test.verified.txt
index 3992088a19..1f79ca1e5f 100644
--- a/TUnit.Core.SourceGenerator.Tests/DataDrivenTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/DataDrivenTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -66,7 +66,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_T
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -89,8 +89,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_T
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -107,7 +106,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_T
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -132,7 +131,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -198,7 +197,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_s
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -221,8 +220,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_s
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -239,7 +237,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_DataSource_Method__int_s
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -264,7 +262,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_EnumValue__TestEnum_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -323,7 +321,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EnumValue__TestEnum_Test
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -346,8 +344,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EnumValue__TestEnum_Test
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -364,7 +361,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EnumValue__TestEnum_Test
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -389,7 +386,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_NullValue__string__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -446,7 +443,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NullValue__string__TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -469,8 +466,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NullValue__string__TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -487,7 +483,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NullValue__string__TestS
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -512,7 +508,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_EmptyString__string__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -569,7 +565,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EmptyString__string__Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -592,8 +588,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EmptyString__string__Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -610,7 +605,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_EmptyString__string__Tes
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -635,7 +630,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_NonEmptyString__string__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -692,7 +687,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NonEmptyString__string__
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -715,8 +710,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NonEmptyString__string__
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -733,7 +727,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_NonEmptyString__string__
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -758,7 +752,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_BooleanString__bool__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -817,7 +811,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_BooleanString__bool__Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -840,8 +834,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_BooleanString__bool__Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -858,7 +851,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_BooleanString__bool__Tes
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -883,7 +876,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_Type__Type_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -940,7 +933,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_Type__Type_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -963,8 +956,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_Type__Type_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -981,7 +973,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_Type__Type_TestSource :
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1006,7 +998,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_IntegerArray__int___TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -1063,7 +1055,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntegerArray__int___Test
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1086,8 +1078,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntegerArray__int___Test
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1104,7 +1095,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntegerArray__int___Test
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1129,7 +1120,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataDrivenTests_IntMaxValue__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataDrivenTests>
         {
@@ -1186,7 +1177,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntMaxValue__int_TestSou
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DataDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1209,8 +1200,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntMaxValue__int_TestSou
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1227,7 +1217,7 @@ internal sealed class TUnit_TestProject_DataDrivenTests_IntMaxValue__int_TestSou
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/DataSourceClassCombinedWithDataSourceMethodTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/DataSourceClassCombinedWithDataSourceMethodTests.Test.verified.txt
index f8566c1769..0286bae7f4 100644
--- a/TUnit.Core.SourceGenerator.Tests/DataSourceClassCombinedWithDataSourceMethodTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/DataSourceClassCombinedWithDataSourceMethodTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataSourceClassCombinedWithDataSourceMethod_DataSourceClassCombinedW_3C180E22_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataSourceClassCombinedWithDataSourceMethod>
         {
@@ -149,7 +149,7 @@ internal sealed class TUnit_TestProject_DataSourceClassCombinedWithDataSourceMet
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.DataSourceClassCombinedWithDataSourceMethod(global::TUnit.Core.Helpers.CastHelper.Cast<int>(args[0]));
             },
@@ -175,8 +175,7 @@ internal sealed class TUnit_TestProject_DataSourceClassCombinedWithDataSourceMet
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -193,7 +192,7 @@ internal sealed class TUnit_TestProject_DataSourceClassCombinedWithDataSourceMet
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/DataSourceGeneratorTests.Typed.verified.txt b/TUnit.Core.SourceGenerator.Tests/DataSourceGeneratorTests.Typed.verified.txt
index 73da974fd8..c710ef094c 100644
--- a/TUnit.Core.SourceGenerator.Tests/DataSourceGeneratorTests.Typed.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/DataSourceGeneratorTests.Typed.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataSourceGeneratorTests_GeneratedData_Method__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataSourceGeneratorTests>
         {
@@ -93,7 +93,7 @@ internal sealed class TUnit_TestProject_DataSourceGeneratorTests_GeneratedData_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.DataSourceGeneratorTests(global::TUnit.Core.Helpers.CastHelper.Cast<int>(args[0]), global::TUnit.Core.Helpers.CastHelper.Cast<string>(args[1]), global::TUnit.Core.Helpers.CastHelper.Cast<bool>(args[2]));
             },
@@ -119,8 +119,7 @@ internal sealed class TUnit_TestProject_DataSourceGeneratorTests_GeneratedData_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -137,7 +136,7 @@ internal sealed class TUnit_TestProject_DataSourceGeneratorTests_GeneratedData_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -162,7 +161,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataSourceGeneratorTests_GeneratedData_Method2__int_string_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataSourceGeneratorTests>
         {
@@ -262,7 +261,7 @@ internal sealed class TUnit_TestProject_DataSourceGeneratorTests_GeneratedData_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.DataSourceGeneratorTests(global::TUnit.Core.Helpers.CastHelper.Cast<int>(args[0]), global::TUnit.Core.Helpers.CastHelper.Cast<string>(args[1]), global::TUnit.Core.Helpers.CastHelper.Cast<bool>(args[2]));
             },
@@ -288,8 +287,7 @@ internal sealed class TUnit_TestProject_DataSourceGeneratorTests_GeneratedData_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -306,7 +304,7 @@ internal sealed class TUnit_TestProject_DataSourceGeneratorTests_GeneratedData_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -331,7 +329,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DataSourceGeneratorTests_GeneratedData_Method3__int_string_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DataSourceGeneratorTests>
         {
@@ -431,7 +429,7 @@ internal sealed class TUnit_TestProject_DataSourceGeneratorTests_GeneratedData_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.DataSourceGeneratorTests(global::TUnit.Core.Helpers.CastHelper.Cast<int>(args[0]), global::TUnit.Core.Helpers.CastHelper.Cast<string>(args[1]), global::TUnit.Core.Helpers.CastHelper.Cast<bool>(args[2]));
             },
@@ -457,8 +455,7 @@ internal sealed class TUnit_TestProject_DataSourceGeneratorTests_GeneratedData_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -475,7 +472,7 @@ internal sealed class TUnit_TestProject_DataSourceGeneratorTests_GeneratedData_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/DataSourceGeneratorTests.Untyped.verified.txt b/TUnit.Core.SourceGenerator.Tests/DataSourceGeneratorTests.Untyped.verified.txt
index 687a23f8f0..c42eb2e30e 100644
--- a/TUnit.Core.SourceGenerator.Tests/DataSourceGeneratorTests.Untyped.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/DataSourceGeneratorTests.Untyped.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AutoDataTests_Test1__string_int_double_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AutoDataTests>
         {
@@ -84,7 +84,7 @@ internal sealed class TUnit_TestProject_AutoDataTests_Test1__string_int_double_b
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AutoDataTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AutoDataTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -106,8 +106,7 @@ internal sealed class TUnit_TestProject_AutoDataTests_Test1__string_int_double_b
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -124,7 +123,7 @@ internal sealed class TUnit_TestProject_AutoDataTests_Test1__string_int_double_b
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/DecimalArgumentTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/DecimalArgumentTests.Test.verified.txt
index 2531c6cbc5..d64fec6f0b 100644
--- a/TUnit.Core.SourceGenerator.Tests/DecimalArgumentTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/DecimalArgumentTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DecimalArgumentTests_Transfer__decimal_decimal_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DecimalArgumentTests>
         {
@@ -73,7 +73,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_Transfer__decimal_d
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -95,8 +95,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_Transfer__decimal_d
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -113,7 +112,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_Transfer__decimal_d
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -138,7 +137,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DecimalArgumentTests_SimpleDecimal__decimal_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DecimalArgumentTests>
         {
@@ -195,7 +194,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_SimpleDecimal__deci
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -217,8 +216,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_SimpleDecimal__deci
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -235,7 +233,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_SimpleDecimal__deci
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -260,7 +258,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DecimalArgumentTests_SmallDecimal__decimal_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DecimalArgumentTests>
         {
@@ -317,7 +315,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_SmallDecimal__decim
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -339,8 +337,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_SmallDecimal__decim
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -357,7 +354,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_SmallDecimal__decim
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -382,7 +379,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DecimalArgumentTests_MaxDecimal__decimal_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DecimalArgumentTests>
         {
@@ -439,7 +436,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_MaxDecimal__decimal
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -461,8 +458,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_MaxDecimal__decimal
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -479,7 +475,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_MaxDecimal__decimal
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -504,7 +500,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DecimalArgumentTests_MinDecimal__decimal_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DecimalArgumentTests>
         {
@@ -561,7 +557,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_MinDecimal__decimal
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -583,8 +579,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_MinDecimal__decimal
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -601,7 +596,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_MinDecimal__decimal
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -626,7 +621,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DecimalArgumentTests_ExplicitDecimalValue__decimal_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DecimalArgumentTests>
         {
@@ -683,7 +678,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_ExplicitDecimalValu
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -705,8 +700,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_ExplicitDecimalValu
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -723,7 +717,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_ExplicitDecimalValu
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -748,7 +742,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DecimalArgumentTests_MultipleDecimals__decimal_decimal_decimal_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DecimalArgumentTests>
         {
@@ -819,7 +813,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_MultipleDecimals__d
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -841,8 +835,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_MultipleDecimals__d
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -859,7 +852,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_MultipleDecimals__d
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -884,7 +877,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DecimalArgumentTests_Test__decimal_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DecimalArgumentTests>
         {
@@ -943,7 +936,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_Test__decimal_TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -966,8 +959,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_Test__decimal_TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -984,7 +976,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_Test__decimal_TestS
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1009,7 +1001,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DecimalArgumentTests_TransactionDiscountCalculations__decimal_decima_54FB9799_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DecimalArgumentTests>
         {
@@ -1103,7 +1095,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_TransactionDiscount
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1126,8 +1118,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_TransactionDiscount
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1144,7 +1135,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_TransactionDiscount
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1169,7 +1160,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DecimalArgumentTests_Equality3__decimal_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DecimalArgumentTests>
         {
@@ -1226,7 +1217,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_Equality3__decimal_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1248,8 +1239,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_Equality3__decimal_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1266,7 +1256,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_Equality3__decimal_
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1291,7 +1281,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DecimalArgumentTests_Equality4__decimal_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DecimalArgumentTests>
         {
@@ -1348,7 +1338,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_Equality4__decimal_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1370,8 +1360,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_Equality4__decimal_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1388,7 +1377,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_Equality4__decimal_
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1413,7 +1402,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_DecimalArgumentTests_TestMethod__decimal_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.DecimalArgumentTests>
         {
@@ -1470,7 +1459,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_TestMethod__decimal
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.DecimalArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1492,8 +1481,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_TestMethod__decimal
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1510,7 +1498,7 @@ internal sealed class TUnit_TestProject_DecimalArgumentTests_TestMethod__decimal
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/DisableReflectionScannerTests.Test.DotNet10_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/DisableReflectionScannerTests.Test.DotNet10_0.verified.txt
index 8f646e8df3..3f1e5b2fcb 100644
--- a/TUnit.Core.SourceGenerator.Tests/DisableReflectionScannerTests.Test.DotNet10_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/DisableReflectionScannerTests.Test.DotNet10_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -66,8 +66,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -84,7 +83,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -109,7 +108,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -153,7 +152,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -167,8 +166,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -185,7 +183,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -210,7 +208,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -254,7 +252,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -268,8 +266,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -286,7 +283,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/DisableReflectionScannerTests.Test.DotNet8_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/DisableReflectionScannerTests.Test.DotNet8_0.verified.txt
index 8f646e8df3..3f1e5b2fcb 100644
--- a/TUnit.Core.SourceGenerator.Tests/DisableReflectionScannerTests.Test.DotNet8_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/DisableReflectionScannerTests.Test.DotNet8_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -66,8 +66,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -84,7 +83,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -109,7 +108,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -153,7 +152,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -167,8 +166,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -185,7 +183,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -210,7 +208,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -254,7 +252,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -268,8 +266,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -286,7 +283,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/DisableReflectionScannerTests.Test.DotNet9_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/DisableReflectionScannerTests.Test.DotNet9_0.verified.txt
index 8f646e8df3..3f1e5b2fcb 100644
--- a/TUnit.Core.SourceGenerator.Tests/DisableReflectionScannerTests.Test.DotNet9_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/DisableReflectionScannerTests.Test.DotNet9_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -66,8 +66,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -84,7 +83,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -109,7 +108,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -153,7 +152,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -167,8 +166,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -185,7 +183,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -210,7 +208,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -254,7 +252,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -268,8 +266,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -286,7 +283,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/DisableReflectionScannerTests.Test.Net4_7.verified.txt b/TUnit.Core.SourceGenerator.Tests/DisableReflectionScannerTests.Test.Net4_7.verified.txt
index 57a80528d1..1a37a733f3 100644
--- a/TUnit.Core.SourceGenerator.Tests/DisableReflectionScannerTests.Test.Net4_7.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/DisableReflectionScannerTests.Test.Net4_7.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -66,8 +66,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -84,7 +83,7 @@ internal sealed class TUnit_TestProject_BasicTests_SynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -109,7 +108,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -153,7 +152,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -167,8 +166,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -185,7 +183,7 @@ internal sealed class TUnit_TestProject_BasicTests_AsynchronousTest_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -210,7 +208,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.BasicTests>
         {
@@ -254,7 +252,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.BasicTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -268,8 +266,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -286,7 +283,7 @@ internal sealed class TUnit_TestProject_BasicTests_ValueTaskAsynchronousTest_Tes
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/EnumMemberNamesTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/EnumMemberNamesTests.Test.verified.txt
index 9eb4edbbe3..f0da3a0012 100644
--- a/TUnit.Core.SourceGenerator.Tests/EnumMemberNamesTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/EnumMemberNamesTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1432_EnumMemberNamesTests_SomeTest__string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1432.EnumMemberNamesTests>
         {
@@ -66,7 +66,7 @@ internal sealed class TUnit_TestProject_Bugs__1432_EnumMemberNamesTests_SomeTest
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1432.EnumMemberNamesTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1432.EnumMemberNamesTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -89,8 +89,7 @@ internal sealed class TUnit_TestProject_Bugs__1432_EnumMemberNamesTests_SomeTest
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -107,7 +106,7 @@ internal sealed class TUnit_TestProject_Bugs__1432_EnumMemberNamesTests_SomeTest
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/EnumerableDataSourceDrivenTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/EnumerableDataSourceDrivenTests.Test.verified.txt
index cadf5ee65b..6b8c41ef25 100644
--- a/TUnit.Core.SourceGenerator.Tests/EnumerableDataSourceDrivenTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/EnumerableDataSourceDrivenTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_EnumerableDataSourceDrivenTests_DataSource_Method__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.EnumerableDataSourceDrivenTests>
         {
@@ -85,7 +85,7 @@ internal sealed class TUnit_TestProject_EnumerableDataSourceDrivenTests_DataSour
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.EnumerableDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.EnumerableDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -107,8 +107,7 @@ internal sealed class TUnit_TestProject_EnumerableDataSourceDrivenTests_DataSour
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -125,7 +124,7 @@ internal sealed class TUnit_TestProject_EnumerableDataSourceDrivenTests_DataSour
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -150,7 +149,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_EnumerableDataSourceDrivenTests_DataSource_Method2__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.EnumerableDataSourceDrivenTests>
         {
@@ -228,7 +227,7 @@ internal sealed class TUnit_TestProject_EnumerableDataSourceDrivenTests_DataSour
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.EnumerableDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.EnumerableDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -250,8 +249,7 @@ internal sealed class TUnit_TestProject_EnumerableDataSourceDrivenTests_DataSour
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -268,7 +266,7 @@ internal sealed class TUnit_TestProject_EnumerableDataSourceDrivenTests_DataSour
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -293,7 +291,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_EnumerableDataSourceDrivenTests_DataSource_WithBaseReturn__BaseValue_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.EnumerableDataSourceDrivenTests>
         {
@@ -371,7 +369,7 @@ internal sealed class TUnit_TestProject_EnumerableDataSourceDrivenTests_DataSour
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.EnumerableDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.EnumerableDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -394,8 +392,7 @@ internal sealed class TUnit_TestProject_EnumerableDataSourceDrivenTests_DataSour
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -412,7 +409,7 @@ internal sealed class TUnit_TestProject_EnumerableDataSourceDrivenTests_DataSour
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/EnumerableTupleDataSourceDrivenTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/EnumerableTupleDataSourceDrivenTests.Test.verified.txt
index 93e9d67c43..09eb157587 100644
--- a/TUnit.Core.SourceGenerator.Tests/EnumerableTupleDataSourceDrivenTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/EnumerableTupleDataSourceDrivenTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_EnumerableTupleDataSourceDrivenTests_DataSource_TupleMethod__int_string_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.EnumerableTupleDataSourceDrivenTests>
         {
@@ -121,7 +121,7 @@ internal sealed class TUnit_TestProject_EnumerableTupleDataSourceDrivenTests_Dat
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.EnumerableTupleDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.EnumerableTupleDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -144,8 +144,7 @@ internal sealed class TUnit_TestProject_EnumerableTupleDataSourceDrivenTests_Dat
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -162,7 +161,7 @@ internal sealed class TUnit_TestProject_EnumerableTupleDataSourceDrivenTests_Dat
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/ExpectedArgumentTypeTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/ExpectedArgumentTypeTests.Test.verified.txt
index daccb82054..caf56ddf12 100644
--- a/TUnit.Core.SourceGenerator.Tests/ExpectedArgumentTypeTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/ExpectedArgumentTypeTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ExpectedArgumentTypeTests_TypedArguments__object_Type_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ExpectedArgumentTypeTests>
         {
@@ -83,7 +83,7 @@ internal sealed class TUnit_TestProject_ExpectedArgumentTypeTests_TypedArguments
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ExpectedArgumentTypeTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ExpectedArgumentTypeTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -105,8 +105,7 @@ internal sealed class TUnit_TestProject_ExpectedArgumentTypeTests_TypedArguments
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -123,7 +122,7 @@ internal sealed class TUnit_TestProject_ExpectedArgumentTypeTests_TypedArguments
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -148,7 +147,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ExpectedArgumentTypeTests_EnumTypes__object_Type_Type_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ExpectedArgumentTypeTests>
         {
@@ -226,7 +225,7 @@ internal sealed class TUnit_TestProject_ExpectedArgumentTypeTests_EnumTypes__obj
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ExpectedArgumentTypeTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ExpectedArgumentTypeTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -248,8 +247,7 @@ internal sealed class TUnit_TestProject_ExpectedArgumentTypeTests_EnumTypes__obj
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -266,7 +264,7 @@ internal sealed class TUnit_TestProject_ExpectedArgumentTypeTests_EnumTypes__obj
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/GenericMethodTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/GenericMethodTests.Test.verified.txt
index c1786d178c..f632a0ac6f 100644
--- a/TUnit.Core.SourceGenerator.Tests/GenericMethodTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/GenericMethodTests.Test.verified.txt
@@ -7,8 +7,9 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_GenericMethodTests_AggregateBy_HasExpectedOutput__IEnumerable_TSourc_06BD488B_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
+        var __results = new global::System.Collections.Generic.List<global::TUnit.Core.TestMetadata>();
         // Create generic metadata with concrete type registrations
         var genericMetadata = new global::TUnit.Core.GenericTestMetadata
         {
@@ -418,8 +419,8 @@ internal sealed class TUnit_TestProject_GenericMethodTests_AggregateBy_HasExpect
             }
         };
         genericMetadata.TestSessionId = testSessionId;
-        yield return genericMetadata;
-        yield break;
+        __results.Add(genericMetadata);
+        return __results;
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -436,7 +437,7 @@ internal sealed class TUnit_TestProject_GenericMethodTests_AggregateBy_HasExpect
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/GenericMethodWithDataSourceTests.Generic_Method_With_MethodDataSource_Should_Generate_Tests.verified.txt b/TUnit.Core.SourceGenerator.Tests/GenericMethodWithDataSourceTests.Generic_Method_With_MethodDataSource_Should_Generate_Tests.verified.txt
index c445138b59..4d2073bad5 100644
--- a/TUnit.Core.SourceGenerator.Tests/GenericMethodWithDataSourceTests.Generic_Method_With_MethodDataSource_Should_Generate_Tests.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/GenericMethodWithDataSourceTests.Generic_Method_With_MethodDataSource_Should_Generate_Tests.verified.txt
@@ -1,4 +1,4 @@
-// <auto-generated/>
+// <auto-generated/>
 #pragma warning disable
 
 #nullable enable
@@ -7,8 +7,9 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__4431_GenericClassNoDataSource_T_Should_Create_Instance_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
+        var __results = new global::System.Collections.Generic.List<global::TUnit.Core.TestMetadata>();
         // Create generic metadata with concrete type registrations
         var genericMetadata = new global::TUnit.Core.GenericTestMetadata
         {
@@ -200,8 +201,8 @@ internal sealed class TUnit_TestProject_Bugs__4431_GenericClassNoDataSource_T_Sh
             }
         };
         genericMetadata.TestSessionId = testSessionId;
-        yield return genericMetadata;
-        yield break;
+        __results.Add(genericMetadata);
+        return __results;
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -218,7 +219,7 @@ internal sealed class TUnit_TestProject_Bugs__4431_GenericClassNoDataSource_T_Sh
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -243,8 +244,9 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__4431_GenericClassWithMethodDataSource_T_Should_Have_Number__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
+        var __results = new global::System.Collections.Generic.List<global::TUnit.Core.TestMetadata>();
         // Create generic metadata with concrete type registrations
         var genericMetadata = new global::TUnit.Core.GenericTestMetadata
         {
@@ -513,8 +515,8 @@ internal sealed class TUnit_TestProject_Bugs__4431_GenericClassWithMethodDataSou
             }
         };
         genericMetadata.TestSessionId = testSessionId;
-        yield return genericMetadata;
-        yield break;
+        __results.Add(genericMetadata);
+        return __results;
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -531,7 +533,7 @@ internal sealed class TUnit_TestProject_Bugs__4431_GenericClassWithMethodDataSou
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -556,8 +558,9 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__4431_NonGenericClassWithGenericMethod_GenericMethod_Should_Work_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
+        var __results = new global::System.Collections.Generic.List<global::TUnit.Core.TestMetadata>();
         // Create generic metadata with concrete type registrations
         var genericMetadata = new global::TUnit.Core.GenericTestMetadata
         {
@@ -815,8 +818,8 @@ internal sealed class TUnit_TestProject_Bugs__4431_NonGenericClassWithGenericMet
             }
         };
         genericMetadata.TestSessionId = testSessionId;
-        yield return genericMetadata;
-        yield break;
+        __results.Add(genericMetadata);
+        return __results;
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -833,7 +836,7 @@ internal sealed class TUnit_TestProject_Bugs__4431_NonGenericClassWithGenericMet
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -858,8 +861,9 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__4431_NonGenericClassWithGenericMethodAndDataSource_GenericMeth_0AB5EDCD_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
+        var __results = new global::System.Collections.Generic.List<global::TUnit.Core.TestMetadata>();
         // Create generic metadata with concrete type registrations
         var genericMetadata = new global::TUnit.Core.GenericTestMetadata
         {
@@ -1124,8 +1128,8 @@ internal sealed class TUnit_TestProject_Bugs__4431_NonGenericClassWithGenericMet
             }
         };
         genericMetadata.TestSessionId = testSessionId;
-        yield return genericMetadata;
-        yield break;
+        __results.Add(genericMetadata);
+        return __results;
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1142,7 +1146,7 @@ internal sealed class TUnit_TestProject_Bugs__4431_NonGenericClassWithGenericMet
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1167,8 +1171,9 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__4431_GenericClassWithGenericMethod_TClass_BothGeneric_Should_Work_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
+        var __results = new global::System.Collections.Generic.List<global::TUnit.Core.TestMetadata>();
         // Create generic metadata with concrete type registrations
         var genericMetadata = new global::TUnit.Core.GenericTestMetadata
         {
@@ -1504,8 +1509,8 @@ internal sealed class TUnit_TestProject_Bugs__4431_GenericClassWithGenericMethod
             }
         };
         genericMetadata.TestSessionId = testSessionId;
-        yield return genericMetadata;
-        yield break;
+        __results.Add(genericMetadata);
+        return __results;
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1522,7 +1527,7 @@ internal sealed class TUnit_TestProject_Bugs__4431_GenericClassWithGenericMethod
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1547,8 +1552,9 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__4431_GenericClassWithConstructor_T_Should_Have_Label_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
+        var __results = new global::System.Collections.Generic.List<global::TUnit.Core.TestMetadata>();
         // Create generic metadata with concrete type registrations
         var genericMetadata = new global::TUnit.Core.GenericTestMetadata
         {
@@ -1740,8 +1746,8 @@ internal sealed class TUnit_TestProject_Bugs__4431_GenericClassWithConstructor_T
             }
         };
         genericMetadata.TestSessionId = testSessionId;
-        yield return genericMetadata;
-        yield break;
+        __results.Add(genericMetadata);
+        return __results;
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1758,7 +1764,7 @@ internal sealed class TUnit_TestProject_Bugs__4431_GenericClassWithConstructor_T
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1783,8 +1789,9 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__4431_MultipleTypeParameters_T1_T2_Should_Handle_Multiple_Type__8C0B02C5_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
+        var __results = new global::System.Collections.Generic.List<global::TUnit.Core.TestMetadata>();
         // Create generic metadata with concrete type registrations
         var genericMetadata = new global::TUnit.Core.GenericTestMetadata
         {
@@ -1976,8 +1983,8 @@ internal sealed class TUnit_TestProject_Bugs__4431_MultipleTypeParameters_T1_T2_
             }
         };
         genericMetadata.TestSessionId = testSessionId;
-        yield return genericMetadata;
-        yield break;
+        __results.Add(genericMetadata);
+        return __results;
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1994,7 +2001,7 @@ internal sealed class TUnit_TestProject_Bugs__4431_MultipleTypeParameters_T1_T2_
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -2019,8 +2026,9 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__4431_DerivedGenericClass_T_Should_Create_From_Base_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
+        var __results = new global::System.Collections.Generic.List<global::TUnit.Core.TestMetadata>();
         // Create generic metadata with concrete type registrations
         var genericMetadata = new global::TUnit.Core.GenericTestMetadata
         {
@@ -2212,8 +2220,8 @@ internal sealed class TUnit_TestProject_Bugs__4431_DerivedGenericClass_T_Should_
             }
         };
         genericMetadata.TestSessionId = testSessionId;
-        yield return genericMetadata;
-        yield break;
+        __results.Add(genericMetadata);
+        return __results;
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -2230,7 +2238,7 @@ internal sealed class TUnit_TestProject_Bugs__4431_DerivedGenericClass_T_Should_
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -2255,8 +2263,9 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__4431_GenericClassWithClassDataSource_T_Should_Have_DataSource_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
+        var __results = new global::System.Collections.Generic.List<global::TUnit.Core.TestMetadata>();
         // Create generic metadata with concrete type registrations
         var genericMetadata = new global::TUnit.Core.GenericTestMetadata
         {
@@ -2580,8 +2589,8 @@ internal sealed class TUnit_TestProject_Bugs__4431_GenericClassWithClassDataSour
             }
         };
         genericMetadata.TestSessionId = testSessionId;
-        yield return genericMetadata;
-        yield break;
+        __results.Add(genericMetadata);
+        return __results;
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -2598,7 +2607,7 @@ internal sealed class TUnit_TestProject_Bugs__4431_GenericClassWithClassDataSour
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -2623,8 +2632,9 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__4431_GenericClassGenericMethodWithDataSources_TClass_FullyGene_0A3B401E_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
+        var __results = new global::System.Collections.Generic.List<global::TUnit.Core.TestMetadata>();
         // Create generic metadata with concrete type registrations
         var genericMetadata = new global::TUnit.Core.GenericTestMetadata
         {
@@ -3325,8 +3335,8 @@ internal sealed class TUnit_TestProject_Bugs__4431_GenericClassGenericMethodWith
             }
         };
         genericMetadata.TestSessionId = testSessionId;
-        yield return genericMetadata;
-        yield break;
+        __results.Add(genericMetadata);
+        return __results;
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -3343,7 +3353,7 @@ internal sealed class TUnit_TestProject_Bugs__4431_GenericClassGenericMethodWith
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_EmptyGenericRegistry_WhenNoGenericsFound.verified.txt b/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_EmptyGenericRegistry_WhenNoGenericsFound.verified.txt
index 3fb82263ce..6d885c506f 100644
--- a/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_EmptyGenericRegistry_WhenNoGenericsFound.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_EmptyGenericRegistry_WhenNoGenericsFound.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_SimpleTestClass_NonGenericTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.SimpleTestClass>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_SimpleTestClass_NonGenericTest_TestSourc
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.SimpleTestClass(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.SimpleTestClass(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -66,8 +66,7 @@ internal sealed class TUnit_TestProject_SimpleTestClass_NonGenericTest_TestSourc
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -84,7 +83,7 @@ internal sealed class TUnit_TestProject_SimpleTestClass_NonGenericTest_TestSourc
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_GenericConstraints_WithInstantiation.verified.txt b/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_GenericConstraints_WithInstantiation.verified.txt
index ee0ab8884e..f3b68e2ec6 100644
--- a/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_GenericConstraints_WithInstantiation.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_GenericConstraints_WithInstantiation.verified.txt
@@ -1,4 +1,4 @@
-// <auto-generated/>
+// <auto-generated/>
 #pragma warning disable
 
 #nullable enable
@@ -7,8 +7,9 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ConstrainedGenericTestClass_T_TestMethod_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
+        var __results = new global::System.Collections.Generic.List<global::TUnit.Core.TestMetadata>();
         // Create generic metadata with concrete type registrations
         var genericMetadata = new global::TUnit.Core.GenericTestMetadata
         {
@@ -197,8 +198,8 @@ internal sealed class TUnit_TestProject_ConstrainedGenericTestClass_T_TestMethod
             }
         };
         genericMetadata.TestSessionId = testSessionId;
-        yield return genericMetadata;
-        yield break;
+        __results.Add(genericMetadata);
+        return __results;
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -215,7 +216,7 @@ internal sealed class TUnit_TestProject_ConstrainedGenericTestClass_T_TestMethod
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_GenericTestClass_WithExplicitInstantiation.verified.txt b/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_GenericTestClass_WithExplicitInstantiation.verified.txt
index 75283e8774..b856bd2d9e 100644
--- a/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_GenericTestClass_WithExplicitInstantiation.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_GenericTestClass_WithExplicitInstantiation.verified.txt
@@ -1,4 +1,4 @@
-// <auto-generated/>
+// <auto-generated/>
 #pragma warning disable
 
 #nullable enable
@@ -7,8 +7,9 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_GenericTestClass_T_TestMethod_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
+        var __results = new global::System.Collections.Generic.List<global::TUnit.Core.TestMetadata>();
         // Create generic metadata with concrete type registrations
         var genericMetadata = new global::TUnit.Core.GenericTestMetadata
         {
@@ -197,8 +198,8 @@ internal sealed class TUnit_TestProject_GenericTestClass_T_TestMethod_TestSource
             }
         };
         genericMetadata.TestSessionId = testSessionId;
-        yield return genericMetadata;
-        yield break;
+        __results.Add(genericMetadata);
+        return __results;
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -215,7 +216,7 @@ internal sealed class TUnit_TestProject_GenericTestClass_T_TestMethod_TestSource
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_GenericTestMethod_WithExplicitInstantiation.verified.txt b/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_GenericTestMethod_WithExplicitInstantiation.verified.txt
index 758deac0b1..e292fd0ea7 100644
--- a/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_GenericTestMethod_WithExplicitInstantiation.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_GenericTestMethod_WithExplicitInstantiation.verified.txt
@@ -1,4 +1,4 @@
-// <auto-generated/>
+// <auto-generated/>
 #pragma warning disable
 
 #nullable enable
@@ -7,8 +7,9 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_TestClass_GenericTestMethod_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
+        var __results = new global::System.Collections.Generic.List<global::TUnit.Core.TestMetadata>();
         // Create generic metadata with concrete type registrations
         var genericMetadata = new global::TUnit.Core.GenericTestMetadata
         {
@@ -193,8 +194,8 @@ internal sealed class TUnit_TestProject_TestClass_GenericTestMethod_TestSource :
             }
         };
         genericMetadata.TestSessionId = testSessionId;
-        yield return genericMetadata;
-        yield break;
+        __results.Add(genericMetadata);
+        return __results;
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -211,7 +212,7 @@ internal sealed class TUnit_TestProject_TestClass_GenericTestMethod_TestSource :
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_MultipleGenericParameters.verified.txt b/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_MultipleGenericParameters.verified.txt
index d809263f3c..fa3b79bed8 100644
--- a/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_MultipleGenericParameters.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_MultipleGenericParameters.verified.txt
@@ -1,4 +1,4 @@
-// <auto-generated/>
+// <auto-generated/>
 #pragma warning disable
 
 #nullable enable
@@ -7,8 +7,9 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MultiGenericTestClass_T1_T2_TestMethod_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
+        var __results = new global::System.Collections.Generic.List<global::TUnit.Core.TestMetadata>();
         // Create generic metadata with concrete type registrations
         var genericMetadata = new global::TUnit.Core.GenericTestMetadata
         {
@@ -197,8 +198,8 @@ internal sealed class TUnit_TestProject_MultiGenericTestClass_T1_T2_TestMethod_T
             }
         };
         genericMetadata.TestSessionId = testSessionId;
-        yield return genericMetadata;
-        yield break;
+        __results.Add(genericMetadata);
+        return __results;
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -215,7 +216,7 @@ internal sealed class TUnit_TestProject_MultiGenericTestClass_T1_T2_TestMethod_T
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_NestedGenericTypes.verified.txt b/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_NestedGenericTypes.verified.txt
index d0bb344970..7610fd5733 100644
--- a/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_NestedGenericTypes.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/GenericTypeResolverTests.Test_NestedGenericTypes.verified.txt
@@ -1,4 +1,4 @@
-// <auto-generated/>
+// <auto-generated/>
 #pragma warning disable
 
 #nullable enable
@@ -7,8 +7,9 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_NestedGenericTestClass_T_TestMethod_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
+        var __results = new global::System.Collections.Generic.List<global::TUnit.Core.TestMetadata>();
         // Create generic metadata with concrete type registrations
         var genericMetadata = new global::TUnit.Core.GenericTestMetadata
         {
@@ -197,8 +198,8 @@ internal sealed class TUnit_TestProject_NestedGenericTestClass_T_TestMethod_Test
             }
         };
         genericMetadata.TestSessionId = testSessionId;
-        yield return genericMetadata;
-        yield break;
+        __results.Add(genericMetadata);
+        return __results;
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -215,7 +216,7 @@ internal sealed class TUnit_TestProject_NestedGenericTestClass_T_TestMethod_Test
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Hooks1589.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/Hooks1589.Test.verified.txt
index c2c5b57fbe..0da7af9a9e 100644
--- a/TUnit.Core.SourceGenerator.Tests/Hooks1589.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Hooks1589.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1589_MyTests_Test1_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1589.MyTests>
         {
@@ -67,7 +67,7 @@ internal sealed class TUnit_TestProject_Bugs__1589_MyTests_Test1_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.Bugs._1589.MyTests(global::TUnit.Core.Helpers.CastHelper.Cast<global::TUnit.TestProject.Bugs._1589.MyFixture>(args[0]));
             },
@@ -84,8 +84,7 @@ internal sealed class TUnit_TestProject_Bugs__1589_MyTests_Test1_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -102,7 +101,7 @@ internal sealed class TUnit_TestProject_Bugs__1589_MyTests_Test1_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Hooks1594.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/Hooks1594.Test.verified.txt
index 996c00eaa9..e1f3db50a7 100644
--- a/TUnit.Core.SourceGenerator.Tests/Hooks1594.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Hooks1594.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1594_MyTests_Test1_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1594.MyTests>
         {
@@ -67,7 +67,7 @@ internal sealed class TUnit_TestProject_Bugs__1594_MyTests_Test1_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.Bugs._1594.MyTests(global::TUnit.Core.Helpers.CastHelper.Cast<global::TUnit.TestProject.Bugs._1594.MyFixture>(args[0]));
             },
@@ -85,8 +85,7 @@ internal sealed class TUnit_TestProject_Bugs__1594_MyTests_Test1_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -103,7 +102,7 @@ internal sealed class TUnit_TestProject_Bugs__1594_MyTests_Test1_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/InheritedPropertySetterTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/InheritedPropertySetterTests.Test.verified.txt
index b9c7e74bb7..123acfb153 100644
--- a/TUnit.Core.SourceGenerator.Tests/InheritedPropertySetterTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/InheritedPropertySetterTests.Test.verified.txt
@@ -21,7 +21,7 @@ internal sealed class TUnit_TestProject_PropertySetterTests_Test_TestSource : gl
     [global::System.Runtime.CompilerServices.UnsafeAccessor(global::System.Runtime.CompilerServices.UnsafeAccessorKind.Field, Name = "<Property7>k__BackingField")]
     private static extern ref string GetProperty7BackingField(global::TUnit.TestProject.PropertySetterTests instance);
     #endif
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.PropertySetterTests>
         {
@@ -312,7 +312,7 @@ internal sealed class TUnit_TestProject_PropertySetterTests_Test_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.PropertySetterTests()
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.PropertySetterTests()
             {
                 Property1 = default!,
                 Property2 = default!,
@@ -335,8 +335,7 @@ internal sealed class TUnit_TestProject_PropertySetterTests_Test_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -353,7 +352,7 @@ internal sealed class TUnit_TestProject_PropertySetterTests_Test_TestSource : gl
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -392,7 +391,7 @@ internal sealed class TUnit_TestProject_InheritedPropertySetterTests_Test_TestSo
     [global::System.Runtime.CompilerServices.UnsafeAccessor(global::System.Runtime.CompilerServices.UnsafeAccessorKind.Field, Name = "<Property7>k__BackingField")]
     private static extern ref string GetProperty7BackingField(global::TUnit.TestProject.PropertySetterTests instance);
     #endif
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.InheritedPropertySetterTests>
         {
@@ -578,7 +577,7 @@ internal sealed class TUnit_TestProject_InheritedPropertySetterTests_Test_TestSo
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.InheritedPropertySetterTests()
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.InheritedPropertySetterTests()
             {
                 Property1 = default!,
                 Property2 = default!,
@@ -601,8 +600,7 @@ internal sealed class TUnit_TestProject_InheritedPropertySetterTests_Test_TestSo
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -619,7 +617,7 @@ internal sealed class TUnit_TestProject_InheritedPropertySetterTests_Test_TestSo
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/InheritedTestsFromDifferentProjectTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/InheritedTestsFromDifferentProjectTests.Test.verified.txt
index 5a9caf8959..58855ad1ce 100644
--- a/TUnit.Core.SourceGenerator.Tests/InheritedTestsFromDifferentProjectTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/InheritedTestsFromDifferentProjectTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_Test_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.InheritedTestsFromDifferentProjectTests>
         {
@@ -54,7 +54,7 @@ internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.InheritedTestsFromDifferentProjectTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.InheritedTestsFromDifferentProjectTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -69,8 +69,7 @@ internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -87,7 +86,7 @@ internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -112,7 +111,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_GenericMethodDataSource__string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.InheritedTestsFromDifferentProjectTests>
         {
@@ -171,7 +170,7 @@ internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.InheritedTestsFromDifferentProjectTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.InheritedTestsFromDifferentProjectTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -194,8 +193,7 @@ internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -212,7 +210,7 @@ internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -237,7 +235,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_NonGenericMethodDataSource__string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.InheritedTestsFromDifferentProjectTests>
         {
@@ -307,7 +305,7 @@ internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.InheritedTestsFromDifferentProjectTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.InheritedTestsFromDifferentProjectTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -330,8 +328,7 @@ internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -348,7 +345,7 @@ internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -373,7 +370,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_VerifyInheritedCategoriesAreAvailable_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.InheritedTestsFromDifferentProjectTests>
         {
@@ -420,7 +417,7 @@ internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.InheritedTestsFromDifferentProjectTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.InheritedTestsFromDifferentProjectTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -434,8 +431,7 @@ internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -452,7 +448,7 @@ internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -477,7 +473,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_BaseTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.InheritedTestsFromDifferentProjectTests>
         {
@@ -525,7 +521,7 @@ internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.InheritedTestsFromDifferentProjectTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.InheritedTestsFromDifferentProjectTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -540,8 +536,7 @@ internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -558,7 +553,7 @@ internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -583,7 +578,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_BaseTestWithMultipleCategories_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.InheritedTestsFromDifferentProjectTests>
         {
@@ -632,7 +627,7 @@ internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.InheritedTestsFromDifferentProjectTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.InheritedTestsFromDifferentProjectTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -647,8 +642,7 @@ internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -665,7 +659,7 @@ internal sealed class TUnit_TestProject_InheritedTestsFromDifferentProjectTests_
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/InheritsTestsAbstractTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/InheritsTestsAbstractTests.Test.verified.txt
index 66defbf2bf..8aac896da7 100644
--- a/TUnit.Core.SourceGenerator.Tests/InheritsTestsAbstractTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/InheritsTestsAbstractTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_SecondTest_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AbstractTests.ConcreteClass2>
         {
@@ -53,7 +53,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_SecondTest_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AbstractTests.ConcreteClass2(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AbstractTests.ConcreteClass2(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -68,8 +68,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_SecondTest_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -86,7 +85,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_SecondTest_
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -111,7 +110,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_AssertClassName_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AbstractTests.ConcreteClass2>
         {
@@ -157,7 +156,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_AssertClass
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AbstractTests.ConcreteClass2(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AbstractTests.ConcreteClass2(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -171,8 +170,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_AssertClass
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -189,7 +187,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass2_AssertClass
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -214,7 +212,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass1_AssertClassName_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AbstractTests.ConcreteClass1>
         {
@@ -259,7 +257,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass1_AssertClass
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AbstractTests.ConcreteClass1(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AbstractTests.ConcreteClass1(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -273,8 +271,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass1_AssertClass
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -291,7 +288,7 @@ internal sealed class TUnit_TestProject_AbstractTests_ConcreteClass1_AssertClass
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/InheritsTestsTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/InheritsTestsTests.Test.verified.txt
index 029d5ef8ea..9602a729d1 100644
--- a/TUnit.Core.SourceGenerator.Tests/InheritsTestsTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/InheritsTestsTests.Test.verified.txt
@@ -11,7 +11,7 @@ internal sealed class TUnit_TestProject_Bugs__1924_None_BaseClass_Test__int_Test
     [global::System.Runtime.CompilerServices.UnsafeAccessor(global::System.Runtime.CompilerServices.UnsafeAccessorKind.Field, Name = "<Data>k__BackingField")]
     private static extern ref global::TUnit.TestProject.Bugs._1924.DataClass GetDataBackingField(global::TUnit.TestProject.Bugs._1924.None.BaseClass instance);
     #endif
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1924.None.BaseClass>
         {
@@ -116,7 +116,7 @@ internal sealed class TUnit_TestProject_Bugs__1924_None_BaseClass_Test__int_Test
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1924.None.BaseClass()
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1924.None.BaseClass()
             {
                 Data = default!,
             },
@@ -141,8 +141,7 @@ internal sealed class TUnit_TestProject_Bugs__1924_None_BaseClass_Test__int_Test
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -159,7 +158,7 @@ internal sealed class TUnit_TestProject_Bugs__1924_None_BaseClass_Test__int_Test
             HasDataSource = true,
             RepeatCount = 10,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -188,7 +187,7 @@ internal sealed class TUnit_TestProject_Bugs__1924_None_Tests_Test__int_TestSour
     [global::System.Runtime.CompilerServices.UnsafeAccessor(global::System.Runtime.CompilerServices.UnsafeAccessorKind.Field, Name = "<Data>k__BackingField")]
     private static extern ref global::TUnit.TestProject.Bugs._1924.DataClass GetDataBackingField(global::TUnit.TestProject.Bugs._1924.None.BaseClass instance);
     #endif
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1924.None.Tests>
         {
@@ -276,7 +275,7 @@ internal sealed class TUnit_TestProject_Bugs__1924_None_Tests_Test__int_TestSour
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1924.None.Tests()
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1924.None.Tests()
             {
                 Data = default!,
             },
@@ -301,8 +300,7 @@ internal sealed class TUnit_TestProject_Bugs__1924_None_Tests_Test__int_TestSour
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -319,7 +317,7 @@ internal sealed class TUnit_TestProject_Bugs__1924_None_Tests_Test__int_TestSour
             HasDataSource = true,
             RepeatCount = 10,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -348,7 +346,7 @@ internal sealed class TUnit_TestProject_Bugs__1924_None_Tests2_Test__int_TestSou
     [global::System.Runtime.CompilerServices.UnsafeAccessor(global::System.Runtime.CompilerServices.UnsafeAccessorKind.Field, Name = "<Data>k__BackingField")]
     private static extern ref global::TUnit.TestProject.Bugs._1924.DataClass GetDataBackingField(global::TUnit.TestProject.Bugs._1924.None.BaseClass instance);
     #endif
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1924.None.Tests2>
         {
@@ -436,7 +434,7 @@ internal sealed class TUnit_TestProject_Bugs__1924_None_Tests2_Test__int_TestSou
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1924.None.Tests2()
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1924.None.Tests2()
             {
                 Data = default!,
             },
@@ -461,8 +459,7 @@ internal sealed class TUnit_TestProject_Bugs__1924_None_Tests2_Test__int_TestSou
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -479,7 +476,7 @@ internal sealed class TUnit_TestProject_Bugs__1924_None_Tests2_Test__int_TestSou
             HasDataSource = true,
             RepeatCount = 10,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -508,7 +505,7 @@ internal sealed class TUnit_TestProject_Bugs__1924_None_Tests3_Test__int_TestSou
     [global::System.Runtime.CompilerServices.UnsafeAccessor(global::System.Runtime.CompilerServices.UnsafeAccessorKind.Field, Name = "<Data>k__BackingField")]
     private static extern ref global::TUnit.TestProject.Bugs._1924.DataClass GetDataBackingField(global::TUnit.TestProject.Bugs._1924.None.BaseClass instance);
     #endif
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1924.None.Tests3>
         {
@@ -596,7 +593,7 @@ internal sealed class TUnit_TestProject_Bugs__1924_None_Tests3_Test__int_TestSou
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1924.None.Tests3()
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1924.None.Tests3()
             {
                 Data = default!,
             },
@@ -621,8 +618,7 @@ internal sealed class TUnit_TestProject_Bugs__1924_None_Tests3_Test__int_TestSou
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -639,7 +635,7 @@ internal sealed class TUnit_TestProject_Bugs__1924_None_Tests3_Test__int_TestSou
             HasDataSource = true,
             RepeatCount = 10,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Issue2887Tests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/Issue2887Tests.Test.verified.txt
index 815c21dd14..1c1063e143 100644
--- a/TUnit.Core.SourceGenerator.Tests/Issue2887Tests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Issue2887Tests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__Issue2887_ActualTestClass_Test1_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._Issue2887.ActualTestClass>
         {
@@ -61,7 +61,7 @@ internal sealed class TUnit_TestProject_Bugs__Issue2887_ActualTestClass_Test1_Te
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 // ClassConstructor attribute is present - instance creation handled at runtime
                 throw new global::System.NotSupportedException("Instance creation for classes with ClassConstructor attribute is handled at runtime");
@@ -80,8 +80,7 @@ internal sealed class TUnit_TestProject_Bugs__Issue2887_ActualTestClass_Test1_Te
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -98,7 +97,7 @@ internal sealed class TUnit_TestProject_Bugs__Issue2887_ActualTestClass_Test1_Te
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/MatrixTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/MatrixTests.Test.verified.txt
index 39404ff175..de4b2c7f25 100644
--- a/TUnit.Core.SourceGenerator.Tests/MatrixTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/MatrixTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_One__string_int_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -78,7 +78,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_One__string_int_b
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -100,8 +100,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_One__string_int_b
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -118,7 +117,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_One__string_int_b
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -143,7 +142,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Two__int_int_int_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -221,7 +220,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Two__int_int_int_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -243,8 +242,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Two__int_int_int_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -261,7 +259,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Two__int_int_int_
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -286,7 +284,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Enum__int_TestEnum_TestEnum__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -357,7 +355,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Enum__int_TestEnu
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -379,8 +377,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Enum__int_TestEnu
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -397,7 +394,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixTest_Enum__int_TestEnu
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -422,7 +419,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools__string_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -486,7 +483,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools__string_bo
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -508,8 +505,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools__string_bo
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -526,7 +522,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools__string_bo
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -551,7 +547,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools2__string_bool__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -615,7 +611,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools2__string_b
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -637,8 +633,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools2__string_b
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -655,7 +650,7 @@ internal sealed class TUnit_TestProject_MatrixTests_AutoGenerateBools2__string_b
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -680,7 +675,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_ImplicitConversion__OneOf_TestEnum__TestEnum2__bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -744,7 +739,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ImplicitConversion__OneOf_Te
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -766,8 +761,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ImplicitConversion__OneOf_Te
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -784,7 +778,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ImplicitConversion__OneOf_Te
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -809,7 +803,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_ExcludingAutoGeneratedMatrixValues__CountToTenEnum_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -873,7 +867,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ExcludingAutoGeneratedMatrix
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -895,8 +889,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ExcludingAutoGeneratedMatrix
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -913,7 +906,7 @@ internal sealed class TUnit_TestProject_MatrixTests_ExcludingAutoGeneratedMatrix
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -938,7 +931,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Method1__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -995,7 +988,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method1__int_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1017,8 +1010,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method1__int_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1035,7 +1027,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method1__int_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1060,7 +1052,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Method2__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1117,7 +1109,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method2__int_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1139,8 +1131,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method2__int_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1157,7 +1148,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method2__int_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1182,7 +1173,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Method3__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1239,7 +1230,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method3__int_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1261,8 +1252,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method3__int_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1279,7 +1269,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method3__int_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1304,7 +1294,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Method4__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1361,7 +1351,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method4__int_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1383,8 +1373,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method4__int_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1401,7 +1390,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Method4__int_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1426,7 +1415,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_Exclusion__int_int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1493,7 +1482,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Exclusion__int_int_TestSourc
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1515,8 +1504,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Exclusion__int_int_TestSourc
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1533,7 +1521,7 @@ internal sealed class TUnit_TestProject_MatrixTests_Exclusion__int_int_TestSourc
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1558,7 +1546,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MatrixTests_MatrixMethod_WithEnumParameter_UsesOnlyMethodValues__boo_38BEEE8F_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MatrixTests>
         {
@@ -1622,7 +1610,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixMethod_WithEnumParamet
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MatrixTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1644,8 +1632,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixMethod_WithEnumParamet
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1662,7 +1649,7 @@ internal sealed class TUnit_TestProject_MatrixTests_MatrixMethod_WithEnumParamet
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/MethodDataSourceDrivenTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/MethodDataSourceDrivenTests.Test.verified.txt
index e736239c19..39f104fc47 100644
--- a/TUnit.Core.SourceGenerator.Tests/MethodDataSourceDrivenTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/MethodDataSourceDrivenTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -75,7 +75,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -98,8 +98,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -116,7 +115,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -141,7 +140,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method2__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -209,7 +208,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -232,8 +231,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -250,7 +248,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -275,7 +273,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method_WithAction__Action_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -343,7 +341,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -366,8 +364,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -384,7 +381,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -409,7 +406,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method3__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -492,7 +489,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -515,8 +512,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -533,7 +529,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -558,7 +554,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_Method4__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -668,7 +664,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -691,8 +687,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -709,7 +704,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_M
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -734,7 +729,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_WithBaseReturn__BaseValue_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -802,7 +797,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_W
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -825,8 +820,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_W
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -843,7 +837,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_DataSource_W
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -868,7 +862,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_EnumerableFuncArrayTest__string___TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenTests>
         {
@@ -946,7 +940,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_EnumerableFu
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -968,8 +962,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_EnumerableFu
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -986,7 +979,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenTests_EnumerableFu
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/MethodDataSourceDrivenWithCancellationTokenTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/MethodDataSourceDrivenWithCancellationTokenTests.Test.verified.txt
index d31124f197..30be7bda96 100644
--- a/TUnit.Core.SourceGenerator.Tests/MethodDataSourceDrivenWithCancellationTokenTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/MethodDataSourceDrivenWithCancellationTokenTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MethodDataSourceDrivenWithCancellationTokenTests_MyTest__int_Cancell_DF7AA95A_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MethodDataSourceDrivenWithCancellationTokenTests>
         {
@@ -183,7 +183,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenWithCancellationTo
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenWithCancellationTokenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.MethodDataSourceDrivenWithCancellationTokenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -207,8 +207,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenWithCancellationTo
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -225,7 +224,7 @@ internal sealed class TUnit_TestProject_MethodDataSourceDrivenWithCancellationTo
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/MultipleClassDataSourceDrivenTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/MultipleClassDataSourceDrivenTests.Test.verified.txt
index 321021d4cc..e62975e0fe 100644
--- a/TUnit.Core.SourceGenerator.Tests/MultipleClassDataSourceDrivenTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/MultipleClassDataSourceDrivenTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MultipleClassDataSourceDrivenTests_Test1_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MultipleClassDataSourceDrivenTests>
         {
@@ -95,7 +95,7 @@ internal sealed class TUnit_TestProject_MultipleClassDataSourceDrivenTests_Test1
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.MultipleClassDataSourceDrivenTests(global::TUnit.Core.Helpers.CastHelper.Cast<global::TUnit.TestProject.MultipleClassDataSourceDrivenTests.Inject1>(args[0]), global::TUnit.Core.Helpers.CastHelper.Cast<global::TUnit.TestProject.MultipleClassDataSourceDrivenTests.Inject2>(args[1]), global::TUnit.Core.Helpers.CastHelper.Cast<global::TUnit.TestProject.MultipleClassDataSourceDrivenTests.Inject3>(args[2]), global::TUnit.Core.Helpers.CastHelper.Cast<global::TUnit.TestProject.MultipleClassDataSourceDrivenTests.Inject4>(args[3]), global::TUnit.Core.Helpers.CastHelper.Cast<global::TUnit.TestProject.MultipleClassDataSourceDrivenTests.Inject5>(args[4]));
             },
@@ -113,8 +113,7 @@ internal sealed class TUnit_TestProject_MultipleClassDataSourceDrivenTests_Test1
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -131,7 +130,7 @@ internal sealed class TUnit_TestProject_MultipleClassDataSourceDrivenTests_Test1
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -156,7 +155,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_MultipleClassDataSourceDrivenTests_Test2_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.MultipleClassDataSourceDrivenTests>
         {
@@ -244,7 +243,7 @@ internal sealed class TUnit_TestProject_MultipleClassDataSourceDrivenTests_Test2
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.MultipleClassDataSourceDrivenTests(global::TUnit.Core.Helpers.CastHelper.Cast<global::TUnit.TestProject.MultipleClassDataSourceDrivenTests.Inject1>(args[0]), global::TUnit.Core.Helpers.CastHelper.Cast<global::TUnit.TestProject.MultipleClassDataSourceDrivenTests.Inject2>(args[1]), global::TUnit.Core.Helpers.CastHelper.Cast<global::TUnit.TestProject.MultipleClassDataSourceDrivenTests.Inject3>(args[2]), global::TUnit.Core.Helpers.CastHelper.Cast<global::TUnit.TestProject.MultipleClassDataSourceDrivenTests.Inject4>(args[3]), global::TUnit.Core.Helpers.CastHelper.Cast<global::TUnit.TestProject.MultipleClassDataSourceDrivenTests.Inject5>(args[4]));
             },
@@ -262,8 +261,7 @@ internal sealed class TUnit_TestProject_MultipleClassDataSourceDrivenTests_Test2
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -280,7 +278,7 @@ internal sealed class TUnit_TestProject_MultipleClassDataSourceDrivenTests_Test2
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/NameOfArgumentTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/NameOfArgumentTests.Test.verified.txt
index c770d4a295..a6c73f21d0 100644
--- a/TUnit.Core.SourceGenerator.Tests/NameOfArgumentTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/NameOfArgumentTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_NameOfArgumentTests_TestName__string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.NameOfArgumentTests>
         {
@@ -64,7 +64,7 @@ internal sealed class TUnit_TestProject_NameOfArgumentTests_TestName__string_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.NameOfArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.NameOfArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -86,8 +86,7 @@ internal sealed class TUnit_TestProject_NameOfArgumentTests_TestName__string_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -104,7 +103,7 @@ internal sealed class TUnit_TestProject_NameOfArgumentTests_TestName__string_Tes
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/NullableByteArgumentTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/NullableByteArgumentTests.Test.verified.txt
index d9299fac67..25c61f5ba1 100644
--- a/TUnit.Core.SourceGenerator.Tests/NullableByteArgumentTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/NullableByteArgumentTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_NullableByteArgumentTests_Test__byte__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.NullableByteArgumentTests>
         {
@@ -65,7 +65,7 @@ internal sealed class TUnit_TestProject_NullableByteArgumentTests_Test__byte__Te
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.NullableByteArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.NullableByteArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -88,8 +88,7 @@ internal sealed class TUnit_TestProject_NullableByteArgumentTests_Test__byte__Te
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -106,7 +105,7 @@ internal sealed class TUnit_TestProject_NullableByteArgumentTests_Test__byte__Te
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -131,7 +130,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_NullableByteArgumentTests_Test2__byte_byte__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.NullableByteArgumentTests>
         {
@@ -196,7 +195,7 @@ internal sealed class TUnit_TestProject_NullableByteArgumentTests_Test2__byte_by
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.NullableByteArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.NullableByteArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -219,8 +218,7 @@ internal sealed class TUnit_TestProject_NullableByteArgumentTests_Test2__byte_by
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -237,7 +235,7 @@ internal sealed class TUnit_TestProject_NullableByteArgumentTests_Test2__byte_by
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/NumberArgumentTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/NumberArgumentTests.Test.verified.txt
index 4aa20125cd..f589df6ccc 100644
--- a/TUnit.Core.SourceGenerator.Tests/NumberArgumentTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/NumberArgumentTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_NumberArgumentTests_Int__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.NumberArgumentTests>
         {
@@ -64,7 +64,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Int__int_TestSource
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -87,8 +87,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Int__int_TestSource
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -105,7 +104,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Int__int_TestSource
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -130,7 +129,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_NumberArgumentTests_Double__double_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.NumberArgumentTests>
         {
@@ -187,7 +186,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Double__double_TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -210,8 +209,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Double__double_TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -228,7 +226,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Double__double_TestS
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -253,7 +251,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_NumberArgumentTests_Float__float_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.NumberArgumentTests>
         {
@@ -310,7 +308,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Float__float_TestSou
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -333,8 +331,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Float__float_TestSou
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -351,7 +348,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Float__float_TestSou
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -376,7 +373,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_NumberArgumentTests_Long__long_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.NumberArgumentTests>
         {
@@ -433,7 +430,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Long__long_TestSourc
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -456,8 +453,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Long__long_TestSourc
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -474,7 +470,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Long__long_TestSourc
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -499,7 +495,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_NumberArgumentTests_ULong__ulong_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.NumberArgumentTests>
         {
@@ -556,7 +552,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_ULong__ulong_TestSou
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -579,8 +575,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_ULong__ulong_TestSou
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -597,7 +592,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_ULong__ulong_TestSou
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -622,7 +617,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_NumberArgumentTests_UInt__uint_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.NumberArgumentTests>
         {
@@ -679,7 +674,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_UInt__uint_TestSourc
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -702,8 +697,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_UInt__uint_TestSourc
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -720,7 +714,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_UInt__uint_TestSourc
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/NumberArgumentTests.TestDE.verified.txt b/TUnit.Core.SourceGenerator.Tests/NumberArgumentTests.TestDE.verified.txt
index 4aa20125cd..f589df6ccc 100644
--- a/TUnit.Core.SourceGenerator.Tests/NumberArgumentTests.TestDE.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/NumberArgumentTests.TestDE.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_NumberArgumentTests_Int__int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.NumberArgumentTests>
         {
@@ -64,7 +64,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Int__int_TestSource
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -87,8 +87,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Int__int_TestSource
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -105,7 +104,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Int__int_TestSource
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -130,7 +129,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_NumberArgumentTests_Double__double_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.NumberArgumentTests>
         {
@@ -187,7 +186,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Double__double_TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -210,8 +209,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Double__double_TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -228,7 +226,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Double__double_TestS
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -253,7 +251,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_NumberArgumentTests_Float__float_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.NumberArgumentTests>
         {
@@ -310,7 +308,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Float__float_TestSou
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -333,8 +331,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Float__float_TestSou
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -351,7 +348,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Float__float_TestSou
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -376,7 +373,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_NumberArgumentTests_Long__long_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.NumberArgumentTests>
         {
@@ -433,7 +430,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Long__long_TestSourc
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -456,8 +453,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Long__long_TestSourc
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -474,7 +470,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_Long__long_TestSourc
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -499,7 +495,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_NumberArgumentTests_ULong__ulong_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.NumberArgumentTests>
         {
@@ -556,7 +552,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_ULong__ulong_TestSou
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -579,8 +575,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_ULong__ulong_TestSou
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -597,7 +592,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_ULong__ulong_TestSou
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -622,7 +617,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_NumberArgumentTests_UInt__uint_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.NumberArgumentTests>
         {
@@ -679,7 +674,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_UInt__uint_TestSourc
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.NumberArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -702,8 +697,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_UInt__uint_TestSourc
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -720,7 +714,7 @@ internal sealed class TUnit_TestProject_NumberArgumentTests_UInt__uint_TestSourc
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/PriorityFilteringTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/PriorityFilteringTests.Test.verified.txt
index 5c27b9710e..b9c22f0a81 100644
--- a/TUnit.Core.SourceGenerator.Tests/PriorityFilteringTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/PriorityFilteringTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_PriorityFilteringTests_High_1_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.PriorityFilteringTests>
         {
@@ -52,7 +52,7 @@ internal sealed class TUnit_TestProject_PriorityFilteringTests_High_1_TestSource
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.PriorityFilteringTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.PriorityFilteringTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -66,8 +66,7 @@ internal sealed class TUnit_TestProject_PriorityFilteringTests_High_1_TestSource
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -84,7 +83,7 @@ internal sealed class TUnit_TestProject_PriorityFilteringTests_High_1_TestSource
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -109,7 +108,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_PriorityFilteringTests_High_2_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.PriorityFilteringTests>
         {
@@ -154,7 +153,7 @@ internal sealed class TUnit_TestProject_PriorityFilteringTests_High_2_TestSource
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.PriorityFilteringTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.PriorityFilteringTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -168,8 +167,7 @@ internal sealed class TUnit_TestProject_PriorityFilteringTests_High_2_TestSource
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -186,7 +184,7 @@ internal sealed class TUnit_TestProject_PriorityFilteringTests_High_2_TestSource
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -211,7 +209,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_PriorityFilteringTests_High_3_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.PriorityFilteringTests>
         {
@@ -256,7 +254,7 @@ internal sealed class TUnit_TestProject_PriorityFilteringTests_High_3_TestSource
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.PriorityFilteringTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.PriorityFilteringTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -270,8 +268,7 @@ internal sealed class TUnit_TestProject_PriorityFilteringTests_High_3_TestSource
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -288,7 +285,7 @@ internal sealed class TUnit_TestProject_PriorityFilteringTests_High_3_TestSource
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -313,7 +310,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_PriorityFilteringTests_Medium_1_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.PriorityFilteringTests>
         {
@@ -358,7 +355,7 @@ internal sealed class TUnit_TestProject_PriorityFilteringTests_Medium_1_TestSour
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.PriorityFilteringTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.PriorityFilteringTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -372,8 +369,7 @@ internal sealed class TUnit_TestProject_PriorityFilteringTests_Medium_1_TestSour
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -390,7 +386,7 @@ internal sealed class TUnit_TestProject_PriorityFilteringTests_Medium_1_TestSour
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -415,7 +411,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_PriorityFilteringTests_Medium_2_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.PriorityFilteringTests>
         {
@@ -460,7 +456,7 @@ internal sealed class TUnit_TestProject_PriorityFilteringTests_Medium_2_TestSour
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.PriorityFilteringTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.PriorityFilteringTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -474,8 +470,7 @@ internal sealed class TUnit_TestProject_PriorityFilteringTests_Medium_2_TestSour
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -492,7 +487,7 @@ internal sealed class TUnit_TestProject_PriorityFilteringTests_Medium_2_TestSour
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -517,7 +512,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_PriorityFilteringTests_Low_1_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.PriorityFilteringTests>
         {
@@ -562,7 +557,7 @@ internal sealed class TUnit_TestProject_PriorityFilteringTests_Low_1_TestSource
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.PriorityFilteringTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.PriorityFilteringTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -576,8 +571,7 @@ internal sealed class TUnit_TestProject_PriorityFilteringTests_Low_1_TestSource
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -594,7 +588,7 @@ internal sealed class TUnit_TestProject_PriorityFilteringTests_Low_1_TestSource
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/PropertySetterTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/PropertySetterTests.Test.verified.txt
index 8db4720ad9..12e9e87252 100644
--- a/TUnit.Core.SourceGenerator.Tests/PropertySetterTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/PropertySetterTests.Test.verified.txt
@@ -21,7 +21,7 @@ internal sealed class TUnit_TestProject_PropertySetterTests_Test_TestSource : gl
     [global::System.Runtime.CompilerServices.UnsafeAccessor(global::System.Runtime.CompilerServices.UnsafeAccessorKind.Field, Name = "<Property7>k__BackingField")]
     private static extern ref string GetProperty7BackingField(global::TUnit.TestProject.PropertySetterTests instance);
     #endif
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.PropertySetterTests>
         {
@@ -312,7 +312,7 @@ internal sealed class TUnit_TestProject_PropertySetterTests_Test_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.PropertySetterTests()
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.PropertySetterTests()
             {
                 Property1 = default!,
                 Property2 = default!,
@@ -335,8 +335,7 @@ internal sealed class TUnit_TestProject_PropertySetterTests_Test_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -353,7 +352,7 @@ internal sealed class TUnit_TestProject_PropertySetterTests_Test_TestSource : gl
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/RepeatTests.Assembly_Level_Repeat.verified.txt b/TUnit.Core.SourceGenerator.Tests/RepeatTests.Assembly_Level_Repeat.verified.txt
index d98b2ae554..51bf68a273 100644
--- a/TUnit.Core.SourceGenerator.Tests/RepeatTests.Assembly_Level_Repeat.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/RepeatTests.Assembly_Level_Repeat.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AssemblyRepeatTests_TestWithAssemblyRepeat_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AssemblyRepeatTests>
         {
@@ -53,7 +53,7 @@ internal sealed class TUnit_TestProject_AssemblyRepeatTests_TestWithAssemblyRepe
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AssemblyRepeatTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AssemblyRepeatTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -68,8 +68,7 @@ internal sealed class TUnit_TestProject_AssemblyRepeatTests_TestWithAssemblyRepe
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -86,7 +85,7 @@ internal sealed class TUnit_TestProject_AssemblyRepeatTests_TestWithAssemblyRepe
             HasDataSource = false,
             RepeatCount = 3,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -111,7 +110,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AssemblyRepeatTests_TestWithMethodRepeatOverride_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AssemblyRepeatTests>
         {
@@ -158,7 +157,7 @@ internal sealed class TUnit_TestProject_AssemblyRepeatTests_TestWithMethodRepeat
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AssemblyRepeatTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AssemblyRepeatTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -173,8 +172,7 @@ internal sealed class TUnit_TestProject_AssemblyRepeatTests_TestWithMethodRepeat
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -191,7 +189,7 @@ internal sealed class TUnit_TestProject_AssemblyRepeatTests_TestWithMethodRepeat
             HasDataSource = false,
             RepeatCount = 1,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/RepeatTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/RepeatTests.Test.verified.txt
index 72f177340c..eb3105ea86 100644
--- a/TUnit.Core.SourceGenerator.Tests/RepeatTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/RepeatTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_RepeatTests_One_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.RepeatTests>
         {
@@ -55,7 +55,7 @@ internal sealed class TUnit_TestProject_RepeatTests_One_TestSource : global::TUn
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.RepeatTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.RepeatTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -70,8 +70,7 @@ internal sealed class TUnit_TestProject_RepeatTests_One_TestSource : global::TUn
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -88,7 +87,7 @@ internal sealed class TUnit_TestProject_RepeatTests_One_TestSource : global::TUn
             HasDataSource = false,
             RepeatCount = 1,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -113,7 +112,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_RepeatTests_Two_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.RepeatTests>
         {
@@ -161,7 +160,7 @@ internal sealed class TUnit_TestProject_RepeatTests_Two_TestSource : global::TUn
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.RepeatTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.RepeatTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -176,8 +175,7 @@ internal sealed class TUnit_TestProject_RepeatTests_Two_TestSource : global::TUn
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -194,7 +192,7 @@ internal sealed class TUnit_TestProject_RepeatTests_Two_TestSource : global::TUn
             HasDataSource = false,
             RepeatCount = 2,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -219,7 +217,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_RepeatTests_Three_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.RepeatTests>
         {
@@ -266,7 +264,7 @@ internal sealed class TUnit_TestProject_RepeatTests_Three_TestSource : global::T
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.RepeatTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.RepeatTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -281,8 +279,7 @@ internal sealed class TUnit_TestProject_RepeatTests_Three_TestSource : global::T
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -299,7 +296,7 @@ internal sealed class TUnit_TestProject_RepeatTests_Three_TestSource : global::T
             HasDataSource = false,
             RepeatCount = 3,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/STAThreadTests.Test.DotNet10_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/STAThreadTests.Test.DotNet10_0.verified.txt
index bc6e19c570..fdd908b1b6 100644
--- a/TUnit.Core.SourceGenerator.Tests/STAThreadTests.Test.DotNet10_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/STAThreadTests.Test.DotNet10_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_With_STA_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -57,7 +57,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_With_STA_TestSource : glo
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -71,8 +71,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_With_STA_TestSource : glo
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -89,7 +88,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_With_STA_TestSource : glo
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -114,7 +113,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_Without_STA_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -163,7 +162,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_Without_STA_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -177,8 +176,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_Without_STA_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -195,7 +193,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_Without_STA_TestSource :
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -220,7 +218,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithSimpleAwait_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -270,7 +268,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithSimpleAwait_TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -284,8 +282,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithSimpleAwait_TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -302,7 +299,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithSimpleAwait_TestS
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -327,7 +324,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskYield_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -377,7 +374,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskYield_TestSou
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -391,8 +388,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskYield_TestSou
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -409,7 +405,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskYield_TestSou
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -434,7 +430,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithConfigureAwaitTrue_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -484,7 +480,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithConfigureAwaitTru
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -498,8 +494,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithConfigureAwaitTru
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -516,7 +511,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithConfigureAwaitTru
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -541,7 +536,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithNestedAsyncCalls_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -591,7 +586,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithNestedAsyncCalls_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -605,8 +600,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithNestedAsyncCalls_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -623,7 +617,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithNestedAsyncCalls_
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -648,7 +642,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskFromResult_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -698,7 +692,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskFromResult_Te
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -712,8 +706,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskFromResult_Te
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -730,7 +723,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskFromResult_Te
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -755,7 +748,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithCompletedTask_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -805,7 +798,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithCompletedTask_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -819,8 +812,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithCompletedTask_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -837,7 +829,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithCompletedTask_Tes
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -862,7 +854,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskRun_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -912,7 +904,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskRun_TestSourc
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -926,8 +918,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskRun_TestSourc
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -944,7 +935,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskRun_TestSourc
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -969,7 +960,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithMultipleAwaits_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1019,7 +1010,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithMultipleAwaits_Te
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1033,8 +1024,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithMultipleAwaits_Te
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1051,7 +1041,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithMultipleAwaits_Te
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1076,7 +1066,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithAsyncEnumerable_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1126,7 +1116,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithAsyncEnumerable_T
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1140,8 +1130,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithAsyncEnumerable_T
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1158,7 +1147,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithAsyncEnumerable_T
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1183,7 +1172,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskWhenAll_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1233,7 +1222,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskWhenAll_TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1247,8 +1236,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskWhenAll_TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1265,7 +1253,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskWhenAll_TestS
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1290,7 +1278,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithExceptionHandling_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1340,7 +1328,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithExceptionHandling
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1354,8 +1342,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithExceptionHandling
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1372,7 +1359,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithExceptionHandling
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1397,7 +1384,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithThrowsNothingAssertion_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1447,7 +1434,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithThrowsNothingAsse
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1461,8 +1448,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithThrowsNothingAsse
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1479,7 +1465,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithThrowsNothingAsse
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1504,7 +1490,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithFuncAssertion_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1554,7 +1540,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithFuncAssertion_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1568,8 +1554,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithFuncAssertion_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1586,7 +1571,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithFuncAssertion_Tes
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/STAThreadTests.Test.DotNet8_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/STAThreadTests.Test.DotNet8_0.verified.txt
index bc6e19c570..fdd908b1b6 100644
--- a/TUnit.Core.SourceGenerator.Tests/STAThreadTests.Test.DotNet8_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/STAThreadTests.Test.DotNet8_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_With_STA_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -57,7 +57,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_With_STA_TestSource : glo
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -71,8 +71,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_With_STA_TestSource : glo
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -89,7 +88,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_With_STA_TestSource : glo
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -114,7 +113,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_Without_STA_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -163,7 +162,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_Without_STA_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -177,8 +176,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_Without_STA_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -195,7 +193,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_Without_STA_TestSource :
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -220,7 +218,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithSimpleAwait_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -270,7 +268,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithSimpleAwait_TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -284,8 +282,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithSimpleAwait_TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -302,7 +299,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithSimpleAwait_TestS
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -327,7 +324,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskYield_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -377,7 +374,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskYield_TestSou
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -391,8 +388,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskYield_TestSou
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -409,7 +405,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskYield_TestSou
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -434,7 +430,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithConfigureAwaitTrue_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -484,7 +480,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithConfigureAwaitTru
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -498,8 +494,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithConfigureAwaitTru
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -516,7 +511,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithConfigureAwaitTru
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -541,7 +536,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithNestedAsyncCalls_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -591,7 +586,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithNestedAsyncCalls_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -605,8 +600,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithNestedAsyncCalls_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -623,7 +617,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithNestedAsyncCalls_
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -648,7 +642,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskFromResult_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -698,7 +692,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskFromResult_Te
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -712,8 +706,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskFromResult_Te
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -730,7 +723,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskFromResult_Te
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -755,7 +748,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithCompletedTask_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -805,7 +798,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithCompletedTask_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -819,8 +812,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithCompletedTask_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -837,7 +829,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithCompletedTask_Tes
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -862,7 +854,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskRun_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -912,7 +904,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskRun_TestSourc
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -926,8 +918,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskRun_TestSourc
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -944,7 +935,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskRun_TestSourc
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -969,7 +960,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithMultipleAwaits_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1019,7 +1010,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithMultipleAwaits_Te
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1033,8 +1024,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithMultipleAwaits_Te
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1051,7 +1041,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithMultipleAwaits_Te
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1076,7 +1066,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithAsyncEnumerable_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1126,7 +1116,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithAsyncEnumerable_T
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1140,8 +1130,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithAsyncEnumerable_T
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1158,7 +1147,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithAsyncEnumerable_T
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1183,7 +1172,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskWhenAll_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1233,7 +1222,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskWhenAll_TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1247,8 +1236,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskWhenAll_TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1265,7 +1253,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskWhenAll_TestS
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1290,7 +1278,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithExceptionHandling_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1340,7 +1328,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithExceptionHandling
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1354,8 +1342,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithExceptionHandling
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1372,7 +1359,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithExceptionHandling
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1397,7 +1384,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithThrowsNothingAssertion_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1447,7 +1434,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithThrowsNothingAsse
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1461,8 +1448,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithThrowsNothingAsse
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1479,7 +1465,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithThrowsNothingAsse
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1504,7 +1490,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithFuncAssertion_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1554,7 +1540,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithFuncAssertion_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1568,8 +1554,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithFuncAssertion_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1586,7 +1571,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithFuncAssertion_Tes
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/STAThreadTests.Test.DotNet9_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/STAThreadTests.Test.DotNet9_0.verified.txt
index bc6e19c570..fdd908b1b6 100644
--- a/TUnit.Core.SourceGenerator.Tests/STAThreadTests.Test.DotNet9_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/STAThreadTests.Test.DotNet9_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_With_STA_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -57,7 +57,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_With_STA_TestSource : glo
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -71,8 +71,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_With_STA_TestSource : glo
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -89,7 +88,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_With_STA_TestSource : glo
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -114,7 +113,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_Without_STA_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -163,7 +162,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_Without_STA_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -177,8 +176,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_Without_STA_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -195,7 +193,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_Without_STA_TestSource :
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -220,7 +218,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithSimpleAwait_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -270,7 +268,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithSimpleAwait_TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -284,8 +282,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithSimpleAwait_TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -302,7 +299,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithSimpleAwait_TestS
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -327,7 +324,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskYield_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -377,7 +374,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskYield_TestSou
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -391,8 +388,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskYield_TestSou
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -409,7 +405,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskYield_TestSou
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -434,7 +430,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithConfigureAwaitTrue_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -484,7 +480,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithConfigureAwaitTru
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -498,8 +494,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithConfigureAwaitTru
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -516,7 +511,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithConfigureAwaitTru
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -541,7 +536,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithNestedAsyncCalls_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -591,7 +586,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithNestedAsyncCalls_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -605,8 +600,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithNestedAsyncCalls_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -623,7 +617,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithNestedAsyncCalls_
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -648,7 +642,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskFromResult_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -698,7 +692,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskFromResult_Te
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -712,8 +706,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskFromResult_Te
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -730,7 +723,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskFromResult_Te
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -755,7 +748,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithCompletedTask_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -805,7 +798,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithCompletedTask_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -819,8 +812,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithCompletedTask_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -837,7 +829,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithCompletedTask_Tes
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -862,7 +854,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskRun_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -912,7 +904,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskRun_TestSourc
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -926,8 +918,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskRun_TestSourc
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -944,7 +935,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskRun_TestSourc
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -969,7 +960,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithMultipleAwaits_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1019,7 +1010,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithMultipleAwaits_Te
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1033,8 +1024,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithMultipleAwaits_Te
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1051,7 +1041,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithMultipleAwaits_Te
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1076,7 +1066,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithAsyncEnumerable_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1126,7 +1116,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithAsyncEnumerable_T
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1140,8 +1130,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithAsyncEnumerable_T
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1158,7 +1147,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithAsyncEnumerable_T
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1183,7 +1172,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskWhenAll_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1233,7 +1222,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskWhenAll_TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1247,8 +1236,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskWhenAll_TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1265,7 +1253,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskWhenAll_TestS
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1290,7 +1278,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithExceptionHandling_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1340,7 +1328,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithExceptionHandling
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1354,8 +1342,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithExceptionHandling
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1372,7 +1359,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithExceptionHandling
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1397,7 +1384,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithThrowsNothingAssertion_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1447,7 +1434,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithThrowsNothingAsse
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1461,8 +1448,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithThrowsNothingAsse
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1479,7 +1465,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithThrowsNothingAsse
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1504,7 +1490,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithFuncAssertion_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1554,7 +1540,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithFuncAssertion_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1568,8 +1554,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithFuncAssertion_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1586,7 +1571,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithFuncAssertion_Tes
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/STAThreadTests.Test.Net4_7.verified.txt b/TUnit.Core.SourceGenerator.Tests/STAThreadTests.Test.Net4_7.verified.txt
index 54aea6040c..9c132d71b3 100644
--- a/TUnit.Core.SourceGenerator.Tests/STAThreadTests.Test.Net4_7.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/STAThreadTests.Test.Net4_7.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_With_STA_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -57,7 +57,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_With_STA_TestSource : glo
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -71,8 +71,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_With_STA_TestSource : glo
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -89,7 +88,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_With_STA_TestSource : glo
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -114,7 +113,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_Without_STA_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -163,7 +162,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_Without_STA_TestSource :
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -177,8 +176,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_Without_STA_TestSource :
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -195,7 +193,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_Without_STA_TestSource :
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -220,7 +218,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithSimpleAwait_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -270,7 +268,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithSimpleAwait_TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -284,8 +282,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithSimpleAwait_TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -302,7 +299,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithSimpleAwait_TestS
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -327,7 +324,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskYield_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -377,7 +374,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskYield_TestSou
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -391,8 +388,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskYield_TestSou
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -409,7 +405,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskYield_TestSou
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -434,7 +430,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithConfigureAwaitTrue_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -484,7 +480,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithConfigureAwaitTru
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -498,8 +494,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithConfigureAwaitTru
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -516,7 +511,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithConfigureAwaitTru
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -541,7 +536,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithNestedAsyncCalls_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -591,7 +586,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithNestedAsyncCalls_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -605,8 +600,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithNestedAsyncCalls_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -623,7 +617,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithNestedAsyncCalls_
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -648,7 +642,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskFromResult_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -698,7 +692,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskFromResult_Te
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -712,8 +706,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskFromResult_Te
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -730,7 +723,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskFromResult_Te
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -755,7 +748,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithCompletedTask_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -805,7 +798,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithCompletedTask_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -819,8 +812,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithCompletedTask_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -837,7 +829,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithCompletedTask_Tes
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -862,7 +854,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskRun_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -912,7 +904,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskRun_TestSourc
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -926,8 +918,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskRun_TestSourc
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -944,7 +935,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskRun_TestSourc
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -969,7 +960,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithMultipleAwaits_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1019,7 +1010,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithMultipleAwaits_Te
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1033,8 +1024,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithMultipleAwaits_Te
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1051,7 +1041,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithMultipleAwaits_Te
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1076,7 +1066,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithAsyncEnumerable_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1126,7 +1116,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithAsyncEnumerable_T
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1140,8 +1130,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithAsyncEnumerable_T
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1158,7 +1147,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithAsyncEnumerable_T
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1183,7 +1172,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskWhenAll_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1233,7 +1222,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskWhenAll_TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1247,8 +1236,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskWhenAll_TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1265,7 +1253,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithTaskWhenAll_TestS
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1290,7 +1278,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithExceptionHandling_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1340,7 +1328,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithExceptionHandling
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1354,8 +1342,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithExceptionHandling
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1372,7 +1359,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithExceptionHandling
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1397,7 +1384,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithThrowsNothingAssertion_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1447,7 +1434,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithThrowsNothingAsse
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1461,8 +1448,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithThrowsNothingAsse
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1479,7 +1465,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithThrowsNothingAsse
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1504,7 +1490,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_STAThreadTests_STA_WithFuncAssertion_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.STAThreadTests>
         {
@@ -1554,7 +1540,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithFuncAssertion_Tes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.STAThreadTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -1568,8 +1554,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithFuncAssertion_Tes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1586,7 +1571,7 @@ internal sealed class TUnit_TestProject_STAThreadTests_STA_WithFuncAssertion_Tes
             HasDataSource = false,
             RepeatCount = 100,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/StringArgumentTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/StringArgumentTests.Test.verified.txt
index f6bcc73497..0d4fa0e455 100644
--- a/TUnit.Core.SourceGenerator.Tests/StringArgumentTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/StringArgumentTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_StringArgumentTests_Normal__string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.StringArgumentTests>
         {
@@ -75,7 +75,7 @@ internal sealed class TUnit_TestProject_StringArgumentTests_Normal__string_TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.StringArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.StringArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -98,8 +98,7 @@ internal sealed class TUnit_TestProject_StringArgumentTests_Normal__string_TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -116,7 +115,7 @@ internal sealed class TUnit_TestProject_StringArgumentTests_Normal__string_TestS
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -141,7 +140,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_StringArgumentTests_Nullable__string__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.StringArgumentTests>
         {
@@ -205,7 +204,7 @@ internal sealed class TUnit_TestProject_StringArgumentTests_Nullable__string__Te
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.StringArgumentTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.StringArgumentTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -228,8 +227,7 @@ internal sealed class TUnit_TestProject_StringArgumentTests_Nullable__string__Te
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -246,7 +244,7 @@ internal sealed class TUnit_TestProject_StringArgumentTests_Nullable__string__Te
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Tests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/Tests.Test.verified.txt
index fb0dd0297b..e34ac2c1a1 100644
--- a/TUnit.Core.SourceGenerator.Tests/Tests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Tests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1304_Tests_TryParse_InvalidString_ReturnsFailure__string__Canc_9F7FA274_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1304.Tests>
         {
@@ -75,7 +75,7 @@ internal sealed class TUnit_TestProject_Bugs__1304_Tests_TryParse_InvalidString_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1304.Tests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1304.Tests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -98,8 +98,7 @@ internal sealed class TUnit_TestProject_Bugs__1304_Tests_TryParse_InvalidString_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -116,7 +115,7 @@ internal sealed class TUnit_TestProject_Bugs__1304_Tests_TryParse_InvalidString_
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -141,7 +140,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1304_Tests_Parse_InvalidString_ThrowsException__string__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1304.Tests>
         {
@@ -202,7 +201,7 @@ internal sealed class TUnit_TestProject_Bugs__1304_Tests_Parse_InvalidString_Thr
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1304.Tests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1304.Tests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -224,8 +223,7 @@ internal sealed class TUnit_TestProject_Bugs__1304_Tests_Parse_InvalidString_Thr
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -242,7 +240,7 @@ internal sealed class TUnit_TestProject_Bugs__1304_Tests_Parse_InvalidString_Thr
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -267,7 +265,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1304_Tests_TryParse_ValidString_ReturnsAccountId__string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1304.Tests>
         {
@@ -325,7 +323,7 @@ internal sealed class TUnit_TestProject_Bugs__1304_Tests_TryParse_ValidString_Re
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1304.Tests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1304.Tests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -347,8 +345,7 @@ internal sealed class TUnit_TestProject_Bugs__1304_Tests_TryParse_ValidString_Re
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -365,7 +362,7 @@ internal sealed class TUnit_TestProject_Bugs__1304_Tests_TryParse_ValidString_Re
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Tests1538.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/Tests1538.Test.verified.txt
index 672dffc6d6..f46e5a1216 100644
--- a/TUnit.Core.SourceGenerator.Tests/Tests1538.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Tests1538.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1538_Tests_Eight_Args__bool_string__string__string__string__st_35276EED_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1538.Tests>
         {
@@ -134,7 +134,7 @@ internal sealed class TUnit_TestProject_Bugs__1538_Tests_Eight_Args__bool_string
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1538.Tests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1538.Tests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -157,8 +157,7 @@ internal sealed class TUnit_TestProject_Bugs__1538_Tests_Eight_Args__bool_string
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -175,7 +174,7 @@ internal sealed class TUnit_TestProject_Bugs__1538_Tests_Eight_Args__bool_string
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -200,7 +199,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1538_Tests_SixteenArgs__bool_string__string__string__string__s_972B9C97_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1538.Tests>
         {
@@ -383,7 +382,7 @@ internal sealed class TUnit_TestProject_Bugs__1538_Tests_SixteenArgs__bool_strin
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1538.Tests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1538.Tests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -406,8 +405,7 @@ internal sealed class TUnit_TestProject_Bugs__1538_Tests_SixteenArgs__bool_strin
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -424,7 +422,7 @@ internal sealed class TUnit_TestProject_Bugs__1538_Tests_SixteenArgs__bool_strin
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Tests1539.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/Tests1539.Test.verified.txt
index d6a447983b..4551490733 100644
--- a/TUnit.Core.SourceGenerator.Tests/Tests1539.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Tests1539.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1539_Tests_Test_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1539.Tests>
         {
@@ -56,7 +56,7 @@ internal sealed class TUnit_TestProject_Bugs__1539_Tests_Test_TestSource : globa
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1539.Tests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1539.Tests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -71,8 +71,7 @@ internal sealed class TUnit_TestProject_Bugs__1539_Tests_Test_TestSource : globa
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -89,7 +88,7 @@ internal sealed class TUnit_TestProject_Bugs__1539_Tests_Test_TestSource : globa
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Tests1589.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/Tests1589.Test.verified.txt
index c2c5b57fbe..0da7af9a9e 100644
--- a/TUnit.Core.SourceGenerator.Tests/Tests1589.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Tests1589.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1589_MyTests_Test1_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1589.MyTests>
         {
@@ -67,7 +67,7 @@ internal sealed class TUnit_TestProject_Bugs__1589_MyTests_Test1_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.Bugs._1589.MyTests(global::TUnit.Core.Helpers.CastHelper.Cast<global::TUnit.TestProject.Bugs._1589.MyFixture>(args[0]));
             },
@@ -84,8 +84,7 @@ internal sealed class TUnit_TestProject_Bugs__1589_MyTests_Test1_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -102,7 +101,7 @@ internal sealed class TUnit_TestProject_Bugs__1589_MyTests_Test1_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Tests1594.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/Tests1594.Test.verified.txt
index 996c00eaa9..e1f3db50a7 100644
--- a/TUnit.Core.SourceGenerator.Tests/Tests1594.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Tests1594.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1594_MyTests_Test1_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1594.MyTests>
         {
@@ -67,7 +67,7 @@ internal sealed class TUnit_TestProject_Bugs__1594_MyTests_Test1_TestSource : gl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.Bugs._1594.MyTests(global::TUnit.Core.Helpers.CastHelper.Cast<global::TUnit.TestProject.Bugs._1594.MyFixture>(args[0]));
             },
@@ -85,8 +85,7 @@ internal sealed class TUnit_TestProject_Bugs__1594_MyTests_Test1_TestSource : gl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -103,7 +102,7 @@ internal sealed class TUnit_TestProject_Bugs__1594_MyTests_Test1_TestSource : gl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Tests1603.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/Tests1603.Test.verified.txt
index 84bc932262..57ac1a6fac 100644
--- a/TUnit.Core.SourceGenerator.Tests/Tests1603.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Tests1603.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1603_Tests_Casted_Integer_To_Short_Converts__short_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1603.Tests>
         {
@@ -64,7 +64,7 @@ internal sealed class TUnit_TestProject_Bugs__1603_Tests_Casted_Integer_To_Short
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1603.Tests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1603.Tests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -86,8 +86,7 @@ internal sealed class TUnit_TestProject_Bugs__1603_Tests_Casted_Integer_To_Short
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -104,7 +103,7 @@ internal sealed class TUnit_TestProject_Bugs__1603_Tests_Casted_Integer_To_Short
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -129,7 +128,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1603_Tests_Integer_To_Short_Converts__short_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1603.Tests>
         {
@@ -186,7 +185,7 @@ internal sealed class TUnit_TestProject_Bugs__1603_Tests_Integer_To_Short_Conver
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1603.Tests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1603.Tests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -208,8 +207,7 @@ internal sealed class TUnit_TestProject_Bugs__1603_Tests_Integer_To_Short_Conver
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -226,7 +224,7 @@ internal sealed class TUnit_TestProject_Bugs__1603_Tests_Integer_To_Short_Conver
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Tests1692.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/Tests1692.Test.verified.txt
index 5883e552a2..61a0b1067d 100644
--- a/TUnit.Core.SourceGenerator.Tests/Tests1692.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Tests1692.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1692_Tests_NullTest__string__TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1692.Tests>
         {
@@ -65,7 +65,7 @@ internal sealed class TUnit_TestProject_Bugs__1692_Tests_NullTest__string__TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1692.Tests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1692.Tests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -87,8 +87,7 @@ internal sealed class TUnit_TestProject_Bugs__1692_Tests_NullTest__string__TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -105,7 +104,7 @@ internal sealed class TUnit_TestProject_Bugs__1692_Tests_NullTest__string__TestS
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Tests1821.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/Tests1821.Test.verified.txt
index de4b8bccd5..8b7778499a 100644
--- a/TUnit.Core.SourceGenerator.Tests/Tests1821.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Tests1821.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1821_Tests_MethodDataSource__string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1821.Tests>
         {
@@ -77,7 +77,7 @@ internal sealed class TUnit_TestProject_Bugs__1821_Tests_MethodDataSource__strin
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.Bugs._1821.Tests(global::TUnit.Core.Helpers.CastHelper.Cast<global::TUnit.TestProject.Bugs._1821.MyData>(args[0]));
             },
@@ -102,8 +102,7 @@ internal sealed class TUnit_TestProject_Bugs__1821_Tests_MethodDataSource__strin
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -120,7 +119,7 @@ internal sealed class TUnit_TestProject_Bugs__1821_Tests_MethodDataSource__strin
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -145,7 +144,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1821_Tests_MatrixDataSource__string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1821.Tests>
         {
@@ -215,7 +214,7 @@ internal sealed class TUnit_TestProject_Bugs__1821_Tests_MatrixDataSource__strin
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.Bugs._1821.Tests(global::TUnit.Core.Helpers.CastHelper.Cast<global::TUnit.TestProject.Bugs._1821.MyData>(args[0]));
             },
@@ -240,8 +239,7 @@ internal sealed class TUnit_TestProject_Bugs__1821_Tests_MatrixDataSource__strin
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -258,7 +256,7 @@ internal sealed class TUnit_TestProject_Bugs__1821_Tests_MatrixDataSource__strin
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Tests1889.Test.DotNet10_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/Tests1889.Test.DotNet10_0.verified.txt
index e9d4ec7f50..20bb1ed8d1 100644
--- a/TUnit.Core.SourceGenerator.Tests/Tests1889.Test.DotNet10_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Tests1889.Test.DotNet10_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test1_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1889.DerivedTest>
         {
@@ -53,7 +53,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test1_TestSource
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -68,8 +68,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test1_TestSource
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -86,7 +85,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test1_TestSource
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -111,7 +110,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test2__bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1889.DerivedTest>
         {
@@ -169,7 +168,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test2__bool_TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -192,8 +191,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test2__bool_TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -210,7 +208,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test2__bool_TestS
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -235,7 +233,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test3__bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1889.DerivedTest>
         {
@@ -294,7 +292,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test3__bool_TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -317,8 +315,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test3__bool_TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -335,7 +332,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test3__bool_TestS
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Tests1889.Test.DotNet8_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/Tests1889.Test.DotNet8_0.verified.txt
index e9d4ec7f50..20bb1ed8d1 100644
--- a/TUnit.Core.SourceGenerator.Tests/Tests1889.Test.DotNet8_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Tests1889.Test.DotNet8_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test1_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1889.DerivedTest>
         {
@@ -53,7 +53,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test1_TestSource
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -68,8 +68,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test1_TestSource
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -86,7 +85,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test1_TestSource
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -111,7 +110,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test2__bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1889.DerivedTest>
         {
@@ -169,7 +168,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test2__bool_TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -192,8 +191,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test2__bool_TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -210,7 +208,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test2__bool_TestS
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -235,7 +233,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test3__bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1889.DerivedTest>
         {
@@ -294,7 +292,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test3__bool_TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -317,8 +315,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test3__bool_TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -335,7 +332,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test3__bool_TestS
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Tests1889.Test.DotNet9_0.verified.txt b/TUnit.Core.SourceGenerator.Tests/Tests1889.Test.DotNet9_0.verified.txt
index e9d4ec7f50..20bb1ed8d1 100644
--- a/TUnit.Core.SourceGenerator.Tests/Tests1889.Test.DotNet9_0.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Tests1889.Test.DotNet9_0.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test1_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1889.DerivedTest>
         {
@@ -53,7 +53,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test1_TestSource
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -68,8 +68,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test1_TestSource
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -86,7 +85,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test1_TestSource
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -111,7 +110,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test2__bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1889.DerivedTest>
         {
@@ -169,7 +168,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test2__bool_TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -192,8 +191,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test2__bool_TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -210,7 +208,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test2__bool_TestS
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -235,7 +233,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test3__bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1889.DerivedTest>
         {
@@ -294,7 +292,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test3__bool_TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -317,8 +315,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test3__bool_TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -335,7 +332,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test3__bool_TestS
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Tests1889.Test.Net4_7.verified.txt b/TUnit.Core.SourceGenerator.Tests/Tests1889.Test.Net4_7.verified.txt
index 21848a6632..e0804527cb 100644
--- a/TUnit.Core.SourceGenerator.Tests/Tests1889.Test.Net4_7.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Tests1889.Test.Net4_7.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test1_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1889.DerivedTest>
         {
@@ -53,7 +53,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test1_TestSource
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -68,8 +68,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test1_TestSource
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -86,7 +85,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test1_TestSource
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -111,7 +110,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test2__bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1889.DerivedTest>
         {
@@ -169,7 +168,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test2__bool_TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -192,8 +191,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test2__bool_TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -210,7 +208,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test2__bool_TestS
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -235,7 +233,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test3__bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1889.DerivedTest>
         {
@@ -294,7 +292,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test3__bool_TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1889.DerivedTest(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -317,8 +315,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test3__bool_TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -335,7 +332,7 @@ internal sealed class TUnit_TestProject_Bugs__1889_DerivedTest_Test3__bool_TestS
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Tests1899.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/Tests1899.Test.verified.txt
index a3151c3e5b..e63f1540af 100644
--- a/TUnit.Core.SourceGenerator.Tests/Tests1899.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Tests1899.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__1899_DerivedTest_Test1_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._1899.DerivedTest>
         {
@@ -53,7 +53,7 @@ internal sealed class TUnit_TestProject_Bugs__1899_DerivedTest_Test1_TestSource
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._1899.DerivedTest(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._1899.DerivedTest(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -68,8 +68,7 @@ internal sealed class TUnit_TestProject_Bugs__1899_DerivedTest_Test1_TestSource
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -86,7 +85,7 @@ internal sealed class TUnit_TestProject_Bugs__1899_DerivedTest_Test1_TestSource
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Tests2083.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/Tests2083.Test.verified.txt
index c0d242bb52..84311dc61e 100644
--- a/TUnit.Core.SourceGenerator.Tests/Tests2083.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Tests2083.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__2083_Tests_MyTest__long_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._2083.Tests>
         {
@@ -69,7 +69,7 @@ internal sealed class TUnit_TestProject_Bugs__2083_Tests_MyTest__long_TestSource
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._2083.Tests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._2083.Tests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -92,8 +92,7 @@ internal sealed class TUnit_TestProject_Bugs__2083_Tests_MyTest__long_TestSource
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -110,7 +109,7 @@ internal sealed class TUnit_TestProject_Bugs__2083_Tests_MyTest__long_TestSource
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Tests2085.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/Tests2085.Test.verified.txt
index 78967c0eaf..6e228a0596 100644
--- a/TUnit.Core.SourceGenerator.Tests/Tests2085.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Tests2085.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__2085_Tests_Double_SpecialConsts__double_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._2085.Tests>
         {
@@ -64,7 +64,7 @@ internal sealed class TUnit_TestProject_Bugs__2085_Tests_Double_SpecialConsts__d
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._2085.Tests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._2085.Tests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -86,8 +86,7 @@ internal sealed class TUnit_TestProject_Bugs__2085_Tests_Double_SpecialConsts__d
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -104,7 +103,7 @@ internal sealed class TUnit_TestProject_Bugs__2085_Tests_Double_SpecialConsts__d
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -129,7 +128,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__2085_Tests_Float_SpecialConsts__float_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._2085.Tests>
         {
@@ -186,7 +185,7 @@ internal sealed class TUnit_TestProject_Bugs__2085_Tests_Float_SpecialConsts__fl
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._2085.Tests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._2085.Tests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -208,8 +207,7 @@ internal sealed class TUnit_TestProject_Bugs__2085_Tests_Float_SpecialConsts__fl
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -226,7 +224,7 @@ internal sealed class TUnit_TestProject_Bugs__2085_Tests_Float_SpecialConsts__fl
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Tests2112.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/Tests2112.Test.verified.txt
index dec7e13f5c..cd23e7d64f 100644
--- a/TUnit.Core.SourceGenerator.Tests/Tests2112.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Tests2112.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__2112_Tests_Test__int_long___TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._2112.Tests>
         {
@@ -72,7 +72,7 @@ internal sealed class TUnit_TestProject_Bugs__2112_Tests_Test__int_long___TestSo
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._2112.Tests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._2112.Tests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -125,8 +125,7 @@ internal sealed class TUnit_TestProject_Bugs__2112_Tests_Test__int_long___TestSo
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -143,7 +142,7 @@ internal sealed class TUnit_TestProject_Bugs__2112_Tests_Test__int_long___TestSo
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -168,7 +167,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__2112_Tests_Test2__int_long___TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.Bugs._2112.Tests>
         {
@@ -233,7 +232,7 @@ internal sealed class TUnit_TestProject_Bugs__2112_Tests_Test2__int_long___TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.Bugs._2112.Tests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.Bugs._2112.Tests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -286,8 +285,7 @@ internal sealed class TUnit_TestProject_Bugs__2112_Tests_Test2__int_long___TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -304,7 +302,7 @@ internal sealed class TUnit_TestProject_Bugs__2112_Tests_Test2__int_long___TestS
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/Tests2136.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/Tests2136.Test.verified.txt
index 4ec2fa9e64..131dfbecc2 100644
--- a/TUnit.Core.SourceGenerator.Tests/Tests2136.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/Tests2136.Test.verified.txt
@@ -1,4 +1,4 @@
-// <auto-generated/>
+// <auto-generated/>
 #pragma warning disable
 
 #nullable enable
@@ -7,8 +7,9 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_Bugs__2136_Tests_GenericArgumentsTest__T_string_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
+        var __results = new global::System.Collections.Generic.List<global::TUnit.Core.TestMetadata>();
         // Create generic metadata with concrete type registrations
         var genericMetadata = new global::TUnit.Core.GenericTestMetadata
         {
@@ -498,8 +499,8 @@ internal sealed class TUnit_TestProject_Bugs__2136_Tests_GenericArgumentsTest__T
             }
         };
         genericMetadata.TestSessionId = testSessionId;
-        yield return genericMetadata;
-        yield break;
+        __results.Add(genericMetadata);
+        return __results;
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -516,7 +517,7 @@ internal sealed class TUnit_TestProject_Bugs__2136_Tests_GenericArgumentsTest__T
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/TimeoutCancellationTokenTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/TimeoutCancellationTokenTests.Test.verified.txt
index 22b83b7c2b..bb9d5662f0 100644
--- a/TUnit.Core.SourceGenerator.Tests/TimeoutCancellationTokenTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/TimeoutCancellationTokenTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_DefaultTest__CancellationToken_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.TimeoutCancellationTokenTests>
         {
@@ -96,7 +96,7 @@ internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_DefaultTes
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.TimeoutCancellationTokenTests(global::TUnit.Core.Helpers.CastHelper.Cast<int>(args[0]));
             },
@@ -113,8 +113,7 @@ internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_DefaultTes
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -131,7 +130,7 @@ internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_DefaultTes
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -156,7 +155,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_BasicTest__CancellationToken_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.TimeoutCancellationTokenTests>
         {
@@ -247,7 +246,7 @@ internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_BasicTest_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.TimeoutCancellationTokenTests(global::TUnit.Core.Helpers.CastHelper.Cast<int>(args[0]));
             },
@@ -264,8 +263,7 @@ internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_BasicTest_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -282,7 +280,7 @@ internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_BasicTest_
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -307,7 +305,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_InheritedTimeoutAttribute__CancellationToken_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.TimeoutCancellationTokenTests>
         {
@@ -397,7 +395,7 @@ internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_InheritedT
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.TimeoutCancellationTokenTests(global::TUnit.Core.Helpers.CastHelper.Cast<int>(args[0]));
             },
@@ -414,8 +412,7 @@ internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_InheritedT
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -432,7 +429,7 @@ internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_InheritedT
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -457,7 +454,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_DataTest__int_CancellationToken_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.TimeoutCancellationTokenTests>
         {
@@ -557,7 +554,7 @@ internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_DataTest__
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.TimeoutCancellationTokenTests(global::TUnit.Core.Helpers.CastHelper.Cast<int>(args[0]));
             },
@@ -583,8 +580,7 @@ internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_DataTest__
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -601,7 +597,7 @@ internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_DataTest__
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -626,7 +622,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_DataSourceTest__int_CancellationToken_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.TimeoutCancellationTokenTests>
         {
@@ -747,7 +743,7 @@ internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_DataSource
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.TimeoutCancellationTokenTests(global::TUnit.Core.Helpers.CastHelper.Cast<int>(args[0]));
             },
@@ -773,8 +769,7 @@ internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_DataSource
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -791,7 +786,7 @@ internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_DataSource
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -816,7 +811,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_MatrixTest__int_CancellationToken_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.TimeoutCancellationTokenTests>
         {
@@ -917,7 +912,7 @@ internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_MatrixTest
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.TimeoutCancellationTokenTests(global::TUnit.Core.Helpers.CastHelper.Cast<int>(args[0]));
             },
@@ -943,8 +938,7 @@ internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_MatrixTest
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -961,7 +955,7 @@ internal sealed class TUnit_TestProject_TimeoutCancellationTokenTests_MatrixTest
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -986,7 +980,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_TimeoutDoesNotFireTests_QuickTestDoesNotTimeout__CancellationToken_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.TimeoutDoesNotFireTests>
         {
@@ -1076,7 +1070,7 @@ internal sealed class TUnit_TestProject_TimeoutDoesNotFireTests_QuickTestDoesNot
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.TimeoutDoesNotFireTests(global::TUnit.Core.Helpers.CastHelper.Cast<int>(args[0]));
             },
@@ -1093,8 +1087,7 @@ internal sealed class TUnit_TestProject_TimeoutDoesNotFireTests_QuickTestDoesNot
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1111,7 +1104,7 @@ internal sealed class TUnit_TestProject_TimeoutDoesNotFireTests_QuickTestDoesNot
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
@@ -1136,7 +1129,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_CancellationTokenTriggeredTests_CancellationTokenIsTriggered__Cancel_38B13F70_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.CancellationTokenTriggeredTests>
         {
@@ -1226,7 +1219,7 @@ internal sealed class TUnit_TestProject_CancellationTokenTriggeredTests_Cancella
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) =>
+            InstanceFactory = static (typeArgs, args) =>
             {
                 return new global::TUnit.TestProject.CancellationTokenTriggeredTests(global::TUnit.Core.Helpers.CastHelper.Cast<int>(args[0]));
             },
@@ -1243,8 +1236,7 @@ internal sealed class TUnit_TestProject_CancellationTokenTriggeredTests_Cancella
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -1261,7 +1253,7 @@ internal sealed class TUnit_TestProject_CancellationTokenTriggeredTests_Cancella
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/TupleDataSourceDrivenTests.Test.verified.txt b/TUnit.Core.SourceGenerator.Tests/TupleDataSourceDrivenTests.Test.verified.txt
index ccf119c861..80318b84bc 100644
--- a/TUnit.Core.SourceGenerator.Tests/TupleDataSourceDrivenTests.Test.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/TupleDataSourceDrivenTests.Test.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_TupleDataSourceDrivenTests_DataSource_TupleMethod__int_string_bool_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.TupleDataSourceDrivenTests>
         {
@@ -89,7 +89,7 @@ internal sealed class TUnit_TestProject_TupleDataSourceDrivenTests_DataSource_Tu
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.TupleDataSourceDrivenTests(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.TupleDataSourceDrivenTests(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -112,8 +112,7 @@ internal sealed class TUnit_TestProject_TupleDataSourceDrivenTests_DataSource_Tu
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -130,7 +129,7 @@ internal sealed class TUnit_TestProject_TupleDataSourceDrivenTests_DataSource_Tu
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/UnifiedReflectionFreeTests.Test_AotSafeDataSourceFactories.verified.txt b/TUnit.Core.SourceGenerator.Tests/UnifiedReflectionFreeTests.Test_AotSafeDataSourceFactories.verified.txt
index 711d0e8981..f975995e9d 100644
--- a/TUnit.Core.SourceGenerator.Tests/UnifiedReflectionFreeTests.Test_AotSafeDataSourceFactories.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/UnifiedReflectionFreeTests.Test_AotSafeDataSourceFactories.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_AotDataSourceTest_TestWithDataSource__int_int_int_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.AotDataSourceTest>
         {
@@ -78,7 +78,7 @@ internal sealed class TUnit_TestProject_AotDataSourceTest_TestWithDataSource__in
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.AotDataSourceTest(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.AotDataSourceTest(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -101,8 +101,7 @@ internal sealed class TUnit_TestProject_AotDataSourceTest_TestWithDataSource__in
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -119,7 +118,7 @@ internal sealed class TUnit_TestProject_AotDataSourceTest_TestWithDataSource__in
             HasDataSource = true,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/UnifiedReflectionFreeTests.Test_ConfigurationSupport.verified.txt b/TUnit.Core.SourceGenerator.Tests/UnifiedReflectionFreeTests.Test_ConfigurationSupport.verified.txt
index 3cd62b4cd0..9cd5a28a5a 100644
--- a/TUnit.Core.SourceGenerator.Tests/UnifiedReflectionFreeTests.Test_ConfigurationSupport.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/UnifiedReflectionFreeTests.Test_ConfigurationSupport.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ConfigurationTest_TestWithConfiguration_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ConfigurationTest>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_ConfigurationTest_TestWithConfiguration_
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ConfigurationTest(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ConfigurationTest(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -66,8 +66,7 @@ internal sealed class TUnit_TestProject_ConfigurationTest_TestWithConfiguration_
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -84,7 +83,7 @@ internal sealed class TUnit_TestProject_ConfigurationTest_TestWithConfiguration_
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/UnifiedReflectionFreeTests.Test_ModuleInitializer_Generation.verified.txt b/TUnit.Core.SourceGenerator.Tests/UnifiedReflectionFreeTests.Test_ModuleInitializer_Generation.verified.txt
index 94b5380612..151de011a0 100644
--- a/TUnit.Core.SourceGenerator.Tests/UnifiedReflectionFreeTests.Test_ModuleInitializer_Generation.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/UnifiedReflectionFreeTests.Test_ModuleInitializer_Generation.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_ModuleInitializerTest_TestWithModuleInit_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.ModuleInitializerTest>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_ModuleInitializerTest_TestWithModuleInit
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.ModuleInitializerTest(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.ModuleInitializerTest(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -66,8 +66,7 @@ internal sealed class TUnit_TestProject_ModuleInitializerTest_TestWithModuleInit
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -84,7 +83,7 @@ internal sealed class TUnit_TestProject_ModuleInitializerTest_TestWithModuleInit
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator.Tests/UnifiedReflectionFreeTests.Test_StronglyTypedDelegates_Generation.verified.txt b/TUnit.Core.SourceGenerator.Tests/UnifiedReflectionFreeTests.Test_StronglyTypedDelegates_Generation.verified.txt
index 1a2241bbb2..17a944edf6 100644
--- a/TUnit.Core.SourceGenerator.Tests/UnifiedReflectionFreeTests.Test_StronglyTypedDelegates_Generation.verified.txt
+++ b/TUnit.Core.SourceGenerator.Tests/UnifiedReflectionFreeTests.Test_StronglyTypedDelegates_Generation.verified.txt
@@ -7,7 +7,7 @@ namespace TUnit.Generated;
 [global::System.CodeDom.Compiler.GeneratedCode("TUnit", "1.0.0.0")]
 internal sealed class TUnit_TestProject_TypedDelegateTest_TestWithDelegate_TestSource : global::TUnit.Core.Interfaces.SourceGenerator.ITestSource, global::TUnit.Core.Interfaces.SourceGenerator.ITestDescriptorSource
 {
-    public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)
+    public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)
     {
         var metadata = new global::TUnit.Core.TestMetadata<global::TUnit.TestProject.TypedDelegateTest>
         {
@@ -51,7 +51,7 @@ internal sealed class TUnit_TestProject_TypedDelegateTest_TestWithDelegate_TestS
                     return classMetadata;
                 })
             },
-            InstanceFactory = (typeArgs, args) => new global::TUnit.TestProject.TypedDelegateTest(),
+            InstanceFactory = static (typeArgs, args) => new global::TUnit.TestProject.TypedDelegateTest(),
             InvokeTypedTest = static (instance, args, cancellationToken) =>
             {
                 try
@@ -66,8 +66,7 @@ internal sealed class TUnit_TestProject_TypedDelegateTest_TestWithDelegate_TestS
             },
         };
         metadata.UseRuntimeDataGeneration(testSessionId);
-        yield return metadata;
-        yield break;
+        return new global::TUnit.Core.TestMetadata[] { metadata };
     }
     public global::System.Collections.Generic.IEnumerable<global::TUnit.Core.TestDescriptor> EnumerateTestDescriptors()
     {
@@ -84,7 +83,7 @@ internal sealed class TUnit_TestProject_TypedDelegateTest_TestWithDelegate_TestS
             HasDataSource = false,
             RepeatCount = 0,
             DependsOn = global::System.Array.Empty<string>(),
-            Materializer = GetTestsAsync
+            Materializer = GetTests
         };
     }
 }
diff --git a/TUnit.Core.SourceGenerator/CodeGenerators/Helpers/InstanceFactoryGenerator.cs b/TUnit.Core.SourceGenerator/CodeGenerators/Helpers/InstanceFactoryGenerator.cs
index ccc4f8d02d..19e041f38b 100644
--- a/TUnit.Core.SourceGenerator/CodeGenerators/Helpers/InstanceFactoryGenerator.cs
+++ b/TUnit.Core.SourceGenerator/CodeGenerators/Helpers/InstanceFactoryGenerator.cs
@@ -28,7 +28,7 @@ public static bool HasClassConstructorAttribute(INamedTypeSymbol namedTypeSymbol
     /// </summary>
     public static void GenerateClassConstructorStub(CodeWriter writer)
     {
-        writer.AppendLine("InstanceFactory = (typeArgs, args) =>");
+        writer.AppendLine("InstanceFactory = static (typeArgs, args) =>");
         writer.AppendLine("{");
         writer.Indent();
         writer.AppendLine("// ClassConstructor attribute is present - instance creation handled at runtime");
@@ -111,11 +111,11 @@ public static void GenerateInstanceFactory(CodeWriter writer, ITypeSymbol typeSy
 
             if (!requiredProperties.Any())
             {
-                writer.AppendLine($"InstanceFactory = (typeArgs, args) => new {className}(),");
+                writer.AppendLine($"InstanceFactory = static (typeArgs, args) => new {className}(),");
             }
             else
             {
-                writer.AppendLine($"InstanceFactory = (typeArgs, args) => new {className}()");
+                writer.AppendLine($"InstanceFactory = static (typeArgs, args) => new {className}()");
                 writer.AppendLine("{");
                 writer.Indent();
 
@@ -163,7 +163,7 @@ public static void GenerateInstanceFactory(CodeWriter writer, ITypeSymbol typeSy
 
     private static void GenerateTypedConstructorCall(CodeWriter writer, string className, IMethodSymbol constructor)
     {
-        writer.AppendLine("InstanceFactory = (typeArgs, args) =>");
+        writer.AppendLine("InstanceFactory = static (typeArgs, args) =>");
         writer.AppendLine("{");
         writer.Indent();
 
@@ -223,7 +223,7 @@ private static void GenerateTypedConstructorCall(CodeWriter writer, string class
 
     private static void GenerateGenericInstanceFactory(CodeWriter writer, INamedTypeSymbol genericType)
     {
-        writer.AppendLine("InstanceFactory = (typeArgs, args) =>");
+        writer.AppendLine("InstanceFactory = static (typeArgs, args) =>");
         writer.AppendLine("{");
         writer.Indent();
 
diff --git a/TUnit.Core.SourceGenerator/Generators/TestMetadataGenerator.cs b/TUnit.Core.SourceGenerator/Generators/TestMetadataGenerator.cs
index bd4cfc51dd..73702998d6 100644
--- a/TUnit.Core.SourceGenerator/Generators/TestMetadataGenerator.cs
+++ b/TUnit.Core.SourceGenerator/Generators/TestMetadataGenerator.cs
@@ -327,14 +327,17 @@ private static void GenerateTestMetadata(CodeWriter writer, TestMethodMetadata t
 
         GenerateReflectionFieldAccessors(writer, testMethod.TypeSymbol);
 
-        writer.AppendLine("public async global::System.Collections.Generic.IAsyncEnumerable<global::TUnit.Core.TestMetadata> GetTestsAsync(string testSessionId, [global::System.Runtime.CompilerServices.EnumeratorCancellation] global::System.Threading.CancellationToken cancellationToken = default)");
+        writer.AppendLine("public global::System.Collections.Generic.IReadOnlyList<global::TUnit.Core.TestMetadata> GetTests(string testSessionId)");
         writer.AppendLine("{");
         writer.Indent();
 
-        writer.AppendLine();
+        var needsList = testMethod.IsGenericType || testMethod is { IsGenericMethod: true, MethodSymbol.TypeParameters.Length: > 0 };
 
-        if (testMethod.IsGenericType || testMethod is { IsGenericMethod: true, MethodSymbol.TypeParameters.Length: > 0 })
+        if (needsList)
         {
+            writer.AppendLine("var __results = new global::System.Collections.Generic.List<global::TUnit.Core.TestMetadata>();");
+            writer.AppendLine();
+
             var hasTypedDataSource = testMethod.MethodAttributes
                 .Any(a => DataSourceAttributeHelper.IsDataSourceAttribute(a.AttributeClass) &&
                          InferTypesFromDataSourceAttribute(testMethod.MethodSymbol, a) != null);
@@ -373,13 +376,14 @@ private static void GenerateTestMetadata(CodeWriter writer, TestMethodMetadata t
                 // GenericTestMetadata that the engine will fail with a clear error message
                 GenerateTestMetadataInstance(writer, testMethod, className);
             }
+
+            writer.AppendLine("return __results;");
         }
         else
         {
-            GenerateTestMetadataInstance(writer, testMethod, className);
+            GenerateTestMetadataInstance(writer, testMethod, className, addToResultsList: false);
+            writer.AppendLine("return new global::TUnit.Core.TestMetadata[] { metadata };");
         }
-
-        writer.AppendLine("yield break;");
         writer.Unindent();
         writer.AppendLine("}");
 
@@ -394,7 +398,7 @@ private static void GenerateTestMetadata(CodeWriter writer, TestMethodMetadata t
         GenerateModuleInitializer(writer, testMethod, uniqueClassName);
     }
 
-    private static void GenerateTestMetadataInstance(CodeWriter writer, TestMethodMetadata testMethod, string className)
+    private static void GenerateTestMetadataInstance(CodeWriter writer, TestMethodMetadata testMethod, string className, bool addToResultsList = true)
     {
         var methodName = testMethod.MethodSymbol.Name;
 
@@ -444,7 +448,10 @@ private static void GenerateTestMetadataInstance(CodeWriter writer, TestMethodMe
             writer.AppendLine("metadata.TestSessionId = testSessionId;");
         }
 
-        writer.AppendLine("yield return metadata;");
+        if (addToResultsList)
+        {
+            writer.AppendLine("__results.Add(metadata);");
+        }
     }
 
     private static void GenerateMetadata(CodeWriter writer, TestMethodMetadata testMethod)
@@ -1984,7 +1991,7 @@ private static void GenerateEnumerateTestDescriptors(CodeWriter writer, TestMeth
         writer.AppendLine($"HasDataSource = {(hasDataSource ? "true" : "false")},");
         writer.AppendLine($"RepeatCount = {repeatCount},");
         writer.AppendLine($"DependsOn = {dependsOnArray},");
-        writer.AppendLine("Materializer = GetTestsAsync");
+        writer.AppendLine("Materializer = GetTests");
 
         writer.Unindent();
         writer.AppendLine("};");
@@ -3545,7 +3552,7 @@ private static void GenerateGenericTestWithConcreteTypes(
         writer.AppendLine("};");
 
         writer.AppendLine("genericMetadata.TestSessionId = testSessionId;");
-        writer.AppendLine("yield return genericMetadata;");
+        writer.AppendLine("__results.Add(genericMetadata);");
     }
 
     private static List<ITypeSymbol[]> ExtractTypeArgumentSets(IEnumerable<AttributeData> attributes)
@@ -5162,7 +5169,7 @@ private static void GenerateConcreteTestMetadataForNonGeneric(
         writer.Unindent();
         writer.AppendLine("};");
 
-        writer.AppendLine("yield return metadata;");
+        writer.AppendLine("__results.Add(metadata);");
     }
 
     private static int? ExtractRepeatCount(IMethodSymbol methodSymbol, INamedTypeSymbol typeSymbol)
diff --git a/TUnit.Core/Interfaces/SourceGenerator/ITestSource.cs b/TUnit.Core/Interfaces/SourceGenerator/ITestSource.cs
index 0c9f673c4a..25f7ece7a0 100644
--- a/TUnit.Core/Interfaces/SourceGenerator/ITestSource.cs
+++ b/TUnit.Core/Interfaces/SourceGenerator/ITestSource.cs
@@ -10,11 +10,11 @@
 /// </para>
 /// <list type="number">
 /// <item>Fast enumeration via <see cref="ITestDescriptorSource.EnumerateTestDescriptors"/></item>
-/// <item>Lazy materialization via <see cref="GetTestsAsync"/></item>
+/// <item>Lazy materialization via <see cref="GetTests"/></item>
 /// </list>
 /// <para>
 /// If <see cref="ITestDescriptorSource"/> is not implemented, the discovery pipeline
-/// falls back to <see cref="GetTestsAsync"/> for all tests.
+/// falls back to <see cref="GetTests"/> for all tests.
 /// </para>
 /// </remarks>
 public interface ITestSource
@@ -23,7 +23,6 @@ public interface ITestSource
     /// Gets all test metadata for this test source.
     /// </summary>
     /// <param name="testSessionId">The test session identifier.</param>
-    /// <param name="cancellationToken">Cancellation token.</param>
-    /// <returns>An async enumerable of test metadata.</returns>
-    IAsyncEnumerable<TestMetadata> GetTestsAsync(string testSessionId, CancellationToken cancellationToken = default);
+    /// <returns>A read-only list of test metadata.</returns>
+    IReadOnlyList<TestMetadata> GetTests(string testSessionId);
 }
diff --git a/TUnit.Core/TestDescriptor.cs b/TUnit.Core/TestDescriptor.cs
index e01a1b4e83..900c4e41a3 100644
--- a/TUnit.Core/TestDescriptor.cs
+++ b/TUnit.Core/TestDescriptor.cs
@@ -88,11 +88,11 @@ public readonly struct TestDescriptor
     /// Only invoked for tests that pass filtering.
     /// </summary>
     /// <remarks>
-    /// The delegate accepts a test session ID and cancellation token, returning an async enumerable
-    /// of TestMetadata. For non-parameterized tests, this yields a single item.
-    /// For parameterized tests, this yields one item per data row.
+    /// The delegate accepts a test session ID and returns a list of TestMetadata.
+    /// For non-parameterized tests, this returns a single-element list.
+    /// For parameterized tests, this returns one element per data row.
     /// </remarks>
-    public required Func<string, CancellationToken, IAsyncEnumerable<TestMetadata>> Materializer { get; init; }
+    public required Func<string, IReadOnlyList<TestMetadata>> Materializer { get; init; }
 
     /// <summary>
     /// Initializes a new instance of the <see cref="TestDescriptor"/> struct.
diff --git a/TUnit.Engine/Building/Collectors/AotTestDataCollector.cs b/TUnit.Engine/Building/Collectors/AotTestDataCollector.cs
index 4e365485af..cff2bdb3b3 100644
--- a/TUnit.Engine/Building/Collectors/AotTestDataCollector.cs
+++ b/TUnit.Engine/Building/Collectors/AotTestDataCollector.cs
@@ -52,10 +52,10 @@ public async Task<IEnumerable<TestMetadata>> CollectTestsAsync(string testSessio
         {
             // Single-pass two-phase discovery: enumerate all descriptors once,
             // apply type and descriptor filters during enumeration, expand dependencies from index
-            standardTestMetadatas = await CollectTestsWithTwoPhaseDiscoveryAsync(
+            standardTestMetadatas = CollectTestsWithTwoPhaseDiscovery(
                 Sources.TestSources,
                 testSessionId,
-                filterHints).ConfigureAwait(false);
+                filterHints);
         }
         else
         {
@@ -69,7 +69,7 @@ public async Task<IEnumerable<TestMetadata>> CollectTestsAsync(string testSessio
             }
 
             var testSourcesList = testSourcesByType.SelectMany(kvp => kvp.Value).ToList();
-            standardTestMetadatas = await CollectTestsTraditionalAsync(testSourcesList, testSessionId).ConfigureAwait(false);
+            standardTestMetadatas = CollectTestsTraditional(testSourcesList, testSessionId);
         }
 
         // Dynamic tests are typically rare, collect sequentially
@@ -92,7 +92,7 @@ public async Task<IEnumerable<TestMetadata>> CollectTestsAsync(string testSessio
     /// enumerated descriptors to find dependencies, and then this method enumerated
     /// them again for filtering and materialization.
     /// </summary>
-    private async Task<IEnumerable<TestMetadata>> CollectTestsWithTwoPhaseDiscoveryAsync(
+    private IEnumerable<TestMetadata> CollectTestsWithTwoPhaseDiscovery(
         IEnumerable<KeyValuePair<Type, ConcurrentQueue<ITestSource>>> allSourcesByType,
         string testSessionId,
         FilterHints filterHints)
@@ -209,9 +209,10 @@ private async Task<IEnumerable<TestMetadata>> CollectTestsWithTwoPhaseDiscoveryA
 
         foreach (var descriptor in descriptorsToMaterialize)
         {
-            await foreach (var metadata in descriptor.Materializer(testSessionId, CancellationToken.None).ConfigureAwait(false))
+            var materialized = descriptor.Materializer(testSessionId);
+            for (var i = 0; i < materialized.Count; i++)
             {
-                results.Add(metadata);
+                results.Add(materialized[i]);
             }
         }
 
@@ -222,29 +223,20 @@ private async Task<IEnumerable<TestMetadata>> CollectTestsWithTwoPhaseDiscoveryA
     /// Traditional collection: materialize all tests from sources.
     /// Used when filter hints are not available or sources don't support ITestDescriptorSource.
     /// </summary>
-    private async Task<IEnumerable<TestMetadata>> CollectTestsTraditionalAsync(
+    private IEnumerable<TestMetadata> CollectTestsTraditional(
         List<ITestSource> testSourcesList,
         string testSessionId)
     {
-        // Use sequential processing for small test source sets to avoid task scheduling overhead
-        if (testSourcesList.Count < Building.ParallelThresholds.MinItemsForParallel)
+        var results = new List<TestMetadata>();
+        foreach (var testSource in testSourcesList)
         {
-            var results = new List<TestMetadata>();
-            foreach (var testSource in testSourcesList)
+            var tests = testSource.GetTests(testSessionId);
+            for (var i = 0; i < tests.Count; i++)
             {
-                await foreach (var metadata in testSource.GetTestsAsync(testSessionId))
-                {
-                    results.Add(metadata);
-                }
+                results.Add(tests[i]);
             }
-            return results;
-        }
-        else
-        {
-            return await testSourcesList
-                .SelectManyAsync(testSource => testSource.GetTestsAsync(testSessionId))
-                .ProcessInParallel();
         }
+        return results;
     }
 
     [RequiresUnreferencedCode("Dynamic test collection requires expression compilation and reflection")]
@@ -568,19 +560,16 @@ public IEnumerable<TestDescriptor> EnumerateDescriptors()
     /// Materializes full test metadata from filtered descriptors.
     /// Only called for tests that passed filtering, avoiding unnecessary materialization.
     /// </summary>
-    public async IAsyncEnumerable<TestMetadata> MaterializeFromDescriptorsAsync(
+    public IEnumerable<TestMetadata> MaterializeFromDescriptors(
         IEnumerable<TestDescriptor> descriptors,
-        string testSessionId,
-        [EnumeratorCancellation] CancellationToken cancellationToken = default)
+        string testSessionId)
     {
         foreach (var descriptor in descriptors)
         {
-            cancellationToken.ThrowIfCancellationRequested();
-
-            // Use the materializer delegate to create full TestMetadata
-            await foreach (var metadata in descriptor.Materializer(testSessionId, cancellationToken).ConfigureAwait(false))
+            var materialized = descriptor.Materializer(testSessionId);
+            for (var i = 0; i < materialized.Count; i++)
             {
-                yield return metadata;
+                yield return materialized[i];
             }
         }
     }
diff --git a/TUnit.Engine/Building/Interfaces/ITestDataCollector.cs b/TUnit.Engine/Building/Interfaces/ITestDataCollector.cs
index 87a856303b..609b20e2ca 100644
--- a/TUnit.Engine/Building/Interfaces/ITestDataCollector.cs
+++ b/TUnit.Engine/Building/Interfaces/ITestDataCollector.cs
@@ -37,10 +37,8 @@ internal interface ITestDataCollector
     /// </summary>
     /// <param name="descriptors">Descriptors that passed filtering.</param>
     /// <param name="testSessionId">The test session identifier.</param>
-    /// <param name="cancellationToken">Cancellation token.</param>
     /// <returns>Collection of fully materialized test metadata.</returns>
-    IAsyncEnumerable<TestMetadata> MaterializeFromDescriptorsAsync(
+    IEnumerable<TestMetadata> MaterializeFromDescriptors(
         IEnumerable<TestDescriptor> descriptors,
-        string testSessionId,
-        CancellationToken cancellationToken = default);
+        string testSessionId);
 }
diff --git a/TUnit.Engine/Building/TestBuilderPipeline.cs b/TUnit.Engine/Building/TestBuilderPipeline.cs
index 879384ed8d..9cd01fd205 100644
--- a/TUnit.Engine/Building/TestBuilderPipeline.cs
+++ b/TUnit.Engine/Building/TestBuilderPipeline.cs
@@ -130,15 +130,6 @@ public async Task<IEnumerable<AbstractExecutableTest>> BuildTestsStreamingAsync(
             .ProcessInParallel(cancellationToken: cancellationToken);
     }
 
-    private async IAsyncEnumerable<TestMetadata> ToAsyncEnumerable(IEnumerable<TestMetadata> metadata)
-    {
-        await Task.Yield(); // Yield control once at the start to maintain async context
-        foreach (var item in metadata)
-        {
-            yield return item;
-        }
-    }
-
     /// <summary>
     /// Builds tests from pre-collected metadata.
     /// Use this when metadata has already been collected with filter-aware optimization.
diff --git a/TUnit.Engine/Discovery/ReflectionTestDataCollector.cs b/TUnit.Engine/Discovery/ReflectionTestDataCollector.cs
index 57ec9605e5..c1281a6fc6 100644
--- a/TUnit.Engine/Discovery/ReflectionTestDataCollector.cs
+++ b/TUnit.Engine/Discovery/ReflectionTestDataCollector.cs
@@ -420,7 +420,7 @@ private static async Task<List<TestMetadata>> DiscoverTestsInAssembly(Assembly a
 
                     try
                     {
-                        var metadata = await BuildTestMetadata(type, resolvedMethod).ConfigureAwait(false);
+                        var metadata = BuildTestMetadata(type, resolvedMethod);
                         discoveredTests.Add(metadata);
                     }
                     catch (Exception ex)
@@ -562,7 +562,7 @@ private static async IAsyncEnumerable<TestMetadata> DiscoverTestsInAssemblyStrea
 
                     try
                     {
-                        testMetadata = await BuildTestMetadata(type, resolvedMethod).ConfigureAwait(false);
+                        testMetadata = BuildTestMetadata(type, resolvedMethod);
                     }
                     catch (Exception ex)
                     {
@@ -639,7 +639,7 @@ private static async Task<List<TestMetadata>> DiscoverGenericTests(Type genericT
 
                             // Build test metadata for the concrete type
                             // No class data for GenerateGenericTest - it just provides type arguments
-                            var testMetadata = await BuildTestMetadata(concreteType, resolvedMethod, null).ConfigureAwait(false);
+                            var testMetadata = BuildTestMetadata(concreteType, resolvedMethod, null);
                             discoveredTests.Add(testMetadata);
                         }
                     }
@@ -709,7 +709,7 @@ private static async Task<List<TestMetadata>> DiscoverGenericTests(Type genericT
                                 // The concrete type already has its generic arguments resolved
                                 // For generic types with primary constructors that were resolved from class-level data sources,
                                 // we need to ensure the class data sources contain the specific data for this instantiation
-                                var testMetadata = await BuildTestMetadata(concreteType, resolvedMethod, dataRow).ConfigureAwait(false);
+                                var testMetadata = BuildTestMetadata(concreteType, resolvedMethod, dataRow);
 
                                 discoveredTests.Add(testMetadata);
                             }
@@ -793,7 +793,7 @@ private static async IAsyncEnumerable<TestMetadata> DiscoverGenericTestsStreamin
 
                             // Build test metadata for the concrete type
                             // No class data for GenerateGenericTest - it just provides type arguments
-                            var testMetadata = await BuildTestMetadata(concreteType, resolvedMethod, null).ConfigureAwait(false);
+                            var testMetadata = BuildTestMetadata(concreteType, resolvedMethod, null);
 
                             successfulTests ??= [];
                             successfulTests.Add(testMetadata);
@@ -899,7 +899,7 @@ private static async IAsyncEnumerable<TestMetadata> DiscoverGenericTestsStreamin
                                 // The concrete type already has its generic arguments resolved
                                 // For generic types with primary constructors that were resolved from class-level data sources,
                                 // we need to ensure the class data sources contain the specific data for this instantiation
-                                var testMetadata = await BuildTestMetadata(concreteType, resolvedMethod, dataRow).ConfigureAwait(false);
+                                var testMetadata = BuildTestMetadata(concreteType, resolvedMethod, dataRow);
 
                                 successfulTests ??= [];
                                 successfulTests.Add(testMetadata);
@@ -1008,7 +1008,7 @@ private static int CalculateInheritanceDepth(Type testClass, MethodInfo testMeth
         return depth;
     }
 
-    private static Task<TestMetadata> BuildTestMetadata(
+    private static TestMetadata BuildTestMetadata(
         [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicFields | DynamicallyAccessedMemberTypes.NonPublicFields | DynamicallyAccessedMemberTypes.PublicProperties | DynamicallyAccessedMemberTypes.PublicConstructors | DynamicallyAccessedMemberTypes.NonPublicConstructors | DynamicallyAccessedMemberTypes.PublicMethods | DynamicallyAccessedMemberTypes.NonPublicMethods)]
         Type testClass,
         MethodInfo testMethod,
@@ -1041,7 +1041,7 @@ private static Task<TestMetadata> BuildTestMetadata(
 
         try
         {
-            return Task.FromResult<TestMetadata>(new ReflectionTestMetadata(testClass, testMethod)
+            return new ReflectionTestMetadata(testClass, testMethod)
             {
                 TestName = testName,
                 TestClassType = typeForGenericResolution, // Use resolved type for generic resolution (may be constructed generic base)
@@ -1066,11 +1066,11 @@ private static Task<TestMetadata> BuildTestMetadata(
                     ?? testClass.Assembly.GetCustomAttribute<RepeatAttribute>()?.Times,
                 PropertyInjections = PropertySourceRegistry.DiscoverInjectableProperties(testClass),
                 InheritanceDepth = inheritanceDepth
-            });
+            };
         }
         catch (Exception ex)
         {
-            return Task.FromResult(CreateFailedTestMetadata(testClass, testMethod, ex));
+            return CreateFailedTestMetadata(testClass, testMethod, ex);
         }
     }
 
@@ -2519,51 +2519,46 @@ public IEnumerable<TestDescriptor> EnumerateDescriptors()
         }
     }
 
-    private static Func<string, CancellationToken, IAsyncEnumerable<TestMetadata>> CreateReflectionMaterializer(
+    private static Func<string, IReadOnlyList<TestMetadata>> CreateReflectionMaterializer(
         [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicFields | DynamicallyAccessedMemberTypes.NonPublicFields | DynamicallyAccessedMemberTypes.PublicProperties | DynamicallyAccessedMemberTypes.PublicConstructors | DynamicallyAccessedMemberTypes.NonPublicConstructors | DynamicallyAccessedMemberTypes.PublicMethods | DynamicallyAccessedMemberTypes.NonPublicMethods)]
         Type type,
         MethodInfo method)
     {
-        return (testSessionId, cancellationToken) => MaterializeSingleTestAsync(type, method, cancellationToken);
+        return testSessionId => MaterializeSingleTest(type, method);
     }
 
-    private static async IAsyncEnumerable<TestMetadata> MaterializeSingleTestAsync(
+    private static TestMetadata[] MaterializeSingleTest(
         [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicFields | DynamicallyAccessedMemberTypes.NonPublicFields | DynamicallyAccessedMemberTypes.PublicProperties | DynamicallyAccessedMemberTypes.PublicConstructors | DynamicallyAccessedMemberTypes.NonPublicConstructors | DynamicallyAccessedMemberTypes.PublicMethods | DynamicallyAccessedMemberTypes.NonPublicMethods)]
         Type type,
-        MethodInfo method,
-        [EnumeratorCancellation] CancellationToken cancellationToken = default)
+        MethodInfo method)
     {
-        cancellationToken.ThrowIfCancellationRequested();
-
         TestMetadata metadata;
         try
         {
-            metadata = await BuildTestMetadata(type, method).ConfigureAwait(false);
+            metadata = BuildTestMetadata(type, method);
         }
         catch (Exception ex)
         {
             metadata = CreateFailedTestMetadata(type, method, ex);
         }
 
-        yield return metadata;
+        return [metadata];
     }
 
     /// <summary>
     /// Materializes full test metadata from filtered descriptors.
     /// Only called for tests that passed filtering.
     /// </summary>
-    public async IAsyncEnumerable<TestMetadata> MaterializeFromDescriptorsAsync(
+    public IEnumerable<TestMetadata> MaterializeFromDescriptors(
         IEnumerable<TestDescriptor> descriptors,
-        string testSessionId,
-        [EnumeratorCancellation] CancellationToken cancellationToken = default)
+        string testSessionId)
     {
         foreach (var descriptor in descriptors)
         {
-            cancellationToken.ThrowIfCancellationRequested();
-
-            await foreach (var metadata in descriptor.Materializer(testSessionId, cancellationToken).ConfigureAwait(false))
+            var materialized = descriptor.Materializer(testSessionId);
+            for (var i = 0; i < materialized.Count; i++)
             {
-                yield return metadata;
+                yield return materialized[i];
             }
         }
     }
diff --git a/TUnit.PublicAPI/Tests.Core_Library_Has_No_API_Changes.DotNet10_0.verified.txt b/TUnit.PublicAPI/Tests.Core_Library_Has_No_API_Changes.DotNet10_0.verified.txt
index 5c75388a8f..59d676c317 100644
--- a/TUnit.PublicAPI/Tests.Core_Library_Has_No_API_Changes.DotNet10_0.verified.txt
+++ b/TUnit.PublicAPI/Tests.Core_Library_Has_No_API_Changes.DotNet10_0.verified.txt
@@ -1438,7 +1438,7 @@ namespace
         public required string FullyQualifiedName { get; init; }
         public bool HasDataSource { get; init; }
         public required int LineNumber { get; init; }
-        public required <string, .CancellationToken, .<.TestMetadata>> Materializer { get; init; }
+        public required <string, .<.TestMetadata>> Materializer { get; init; }
         public required string MethodName { get; init; }
         public string[] Properties { get; init; }
         public int RepeatCount { get; init; }
@@ -2610,7 +2610,7 @@ namespace .
     }
     public interface ITestSource
     {
-        .<.TestMetadata> GetTestsAsync(string testSessionId, .CancellationToken cancellationToken = default);
+        .<.TestMetadata> GetTests(string testSessionId);
     }
     public sealed class PropertyInjectionMetadata
     {
diff --git a/TUnit.PublicAPI/Tests.Core_Library_Has_No_API_Changes.DotNet8_0.verified.txt b/TUnit.PublicAPI/Tests.Core_Library_Has_No_API_Changes.DotNet8_0.verified.txt
index a25bd154dc..73325d809b 100644
--- a/TUnit.PublicAPI/Tests.Core_Library_Has_No_API_Changes.DotNet8_0.verified.txt
+++ b/TUnit.PublicAPI/Tests.Core_Library_Has_No_API_Changes.DotNet8_0.verified.txt
@@ -1438,7 +1438,7 @@ namespace
         public required string FullyQualifiedName { get; init; }
         public bool HasDataSource { get; init; }
         public required int LineNumber { get; init; }
-        public required <string, .CancellationToken, .<.TestMetadata>> Materializer { get; init; }
+        public required <string, .<.TestMetadata>> Materializer { get; init; }
         public required string MethodName { get; init; }
         public string[] Properties { get; init; }
         public int RepeatCount { get; init; }
@@ -2610,7 +2610,7 @@ namespace .
     }
     public interface ITestSource
     {
-        .<.TestMetadata> GetTestsAsync(string testSessionId, .CancellationToken cancellationToken = default);
+        .<.TestMetadata> GetTests(string testSessionId);
     }
     public sealed class PropertyInjectionMetadata
     {
diff --git a/TUnit.PublicAPI/Tests.Core_Library_Has_No_API_Changes.DotNet9_0.verified.txt b/TUnit.PublicAPI/Tests.Core_Library_Has_No_API_Changes.DotNet9_0.verified.txt
index 68b8e6d296..c5e5894acf 100644
--- a/TUnit.PublicAPI/Tests.Core_Library_Has_No_API_Changes.DotNet9_0.verified.txt
+++ b/TUnit.PublicAPI/Tests.Core_Library_Has_No_API_Changes.DotNet9_0.verified.txt
@@ -1438,7 +1438,7 @@ namespace
         public required string FullyQualifiedName { get; init; }
         public bool HasDataSource { get; init; }
         public required int LineNumber { get; init; }
-        public required <string, .CancellationToken, .<.TestMetadata>> Materializer { get; init; }
+        public required <string, .<.TestMetadata>> Materializer { get; init; }
         public required string MethodName { get; init; }
         public string[] Properties { get; init; }
         public int RepeatCount { get; init; }
@@ -2610,7 +2610,7 @@ namespace .
     }
     public interface ITestSource
     {
-        .<.TestMetadata> GetTestsAsync(string testSessionId, .CancellationToken cancellationToken = default);
+        .<.TestMetadata> GetTests(string testSessionId);
     }
     public sealed class PropertyInjectionMetadata
     {
diff --git a/TUnit.PublicAPI/Tests.Core_Library_Has_No_API_Changes.Net4_7.verified.txt b/TUnit.PublicAPI/Tests.Core_Library_Has_No_API_Changes.Net4_7.verified.txt
index 5092f73a19..6edbeeed59 100644
--- a/TUnit.PublicAPI/Tests.Core_Library_Has_No_API_Changes.Net4_7.verified.txt
+++ b/TUnit.PublicAPI/Tests.Core_Library_Has_No_API_Changes.Net4_7.verified.txt
@@ -1392,7 +1392,7 @@ namespace
         public required string FullyQualifiedName { get; init; }
         public bool HasDataSource { get; init; }
         public required int LineNumber { get; init; }
-        public required <string, .CancellationToken, .<.TestMetadata>> Materializer { get; init; }
+        public required <string, .<.TestMetadata>> Materializer { get; init; }
         public required string MethodName { get; init; }
         public string[] Properties { get; init; }
         public int RepeatCount { get; init; }
@@ -2554,7 +2554,7 @@ namespace .
     }
     public interface ITestSource
     {
-        .<.TestMetadata> GetTestsAsync(string testSessionId, .CancellationToken cancellationToken = default);
+        .<.TestMetadata> GetTests(string testSessionId);
     }
     public sealed class PropertyInjectionMetadata
     {