diff --git a/eng/pipelines/common/templates/browser-wasm-build-tests.yml b/eng/pipelines/common/templates/browser-wasm-build-tests.yml
index 29a3f854724738..3bcbec8607cac0 100644
--- a/eng/pipelines/common/templates/browser-wasm-build-tests.yml
+++ b/eng/pipelines/common/templates/browser-wasm-build-tests.yml
@@ -110,6 +110,7 @@ jobs:
           /p:InstallWorkloadForTesting=true
           /p:WasmSkipMissingRuntimePackBuild=true
           /p:PreparePackagesForWorkloadInstall=false
+          /p:WorkloadsTestPreviousVersions=$(workloadsTestPreviousVersionsVar)
         timeoutInMinutes: 180
         condition: >-
           or(
diff --git a/eng/testing/workloads-browser.targets b/eng/testing/workloads-browser.targets
index c5f6613059089e..f54d9a1d9de34e 100644
--- a/eng/testing/workloads-browser.targets
+++ b/eng/testing/workloads-browser.targets
@@ -17,7 +17,8 @@
       <WorkloadIdForTesting Include="wasm-tools-net8;wasm-experimental-net8"
                             ManifestName="Microsoft.NET.Workload.Mono.ToolChain.net8"
                             Variant="net8"
-                            Version="$(PackageVersionForWorkloadManifests)" />
+                            Version="$(PackageVersionForWorkloadManifests)"
+                            Condition="'$(WorkloadsTestPreviousVersions)' == 'true'" />
 
       <WorkloadIdForTesting Include="wasm-tools-net7;wasm-experimental-net7"
                             ManifestName="Microsoft.NET.Workload.Mono.ToolChain.net7"
@@ -32,7 +33,8 @@
                             IgnoreErrors="$(WasmIgnoreNet6WorkloadInstallErrors)"
                             Condition="'$(WorkloadsTestPreviousVersions)' == 'true'" />
 
-      <WorkloadCombinationsToInstall Include="latest"        Variants="latest;net8" />
+      <WorkloadCombinationsToInstall Include="latest"        Variants="latest" />
+      <WorkloadCombinationsToInstall Include="net8"          Variants="net8" Condition="'$(WorkloadsTestPreviousVersions)' == 'true'" />
       <WorkloadCombinationsToInstall Include="net7"          Variants="net7" Condition="'$(WorkloadsTestPreviousVersions)' == 'true'" />
       <WorkloadCombinationsToInstall Include="net7+latest"   Variants="net7;latest" Condition="'$(WorkloadsTestPreviousVersions)' == 'true'" />
       <!--<WorkloadCombinationsToInstall Include="net6"     Variants="net6" />-->
diff --git a/eng/testing/workloads-wasi.targets b/eng/testing/workloads-wasi.targets
index 356cad0fa06eff..5b9b4240228e9f 100644
--- a/eng/testing/workloads-wasi.targets
+++ b/eng/testing/workloads-wasi.targets
@@ -17,8 +17,11 @@
       <WorkloadIdForTesting Include="wasi-experimental-net8;wasi-experimental"
                             ManifestName="Microsoft.NET.Workload.Mono.ToolChain.net8"
                             Variant="net8"
-                            Version="$(PackageVersionForWorkloadManifests)" />
-      <WorkloadCombinationsToInstall Include="latest" Variants="latest;net8" />
+                            Version="$(PackageVersionForWorkloadManifests)"
+                            Condition="'$(WorkloadsTestPreviousVersions)' == 'true'" />
+
+      <WorkloadCombinationsToInstall Include="latest"        Variants="latest" />
+      <WorkloadCombinationsToInstall Include="net8"          Variants="net8" Condition="'$(WorkloadsTestPreviousVersions)' == 'true'" />
     </ItemGroup>
   </Target>
 </Project>
diff --git a/src/libraries/sendtohelixhelp.proj b/src/libraries/sendtohelixhelp.proj
index e3efcd584ce4f0..3608f1cae63d0d 100644
--- a/src/libraries/sendtohelixhelp.proj
+++ b/src/libraries/sendtohelixhelp.proj
@@ -156,6 +156,7 @@
     <HelixCommandPrefixEnvVarItem Include="DOTNET_CLI_TELEMETRY_OPTOUT=1" />
     <HelixCommandPrefixEnvVarItem Condition="'$(TestUsingWorkloads)' == 'true'" Include="TEST_USING_WORKLOADS=true" />
     <HelixCommandPrefixEnvVarItem Condition="'$(TestUsingWebcil)' == 'false'" Include="TEST_USING_WEBCIL=false" />
+    <HelixCommandPrefixEnvVarItem Condition="'$(WorkloadsTestPreviousVersions)' == 'true'" Include="WORKLOADS_TEST_PREVIOUS_VERSIONS=true" />
   </ItemGroup>
 
   <PropertyGroup Condition="$(TargetRuntimeIdentifier.ToLowerInvariant().StartsWith('linux-bionic'))">
diff --git a/src/mono/wasm/Wasm.Build.Tests/Common/EnvironmentVariables.cs b/src/mono/wasm/Wasm.Build.Tests/Common/EnvironmentVariables.cs
index 7615d8adf5904d..e2cf9b3dbf8b43 100644
--- a/src/mono/wasm/Wasm.Build.Tests/Common/EnvironmentVariables.cs
+++ b/src/mono/wasm/Wasm.Build.Tests/Common/EnvironmentVariables.cs
@@ -24,5 +24,6 @@ internal static class EnvironmentVariables
         internal static readonly bool UseWebcil                    = Environment.GetEnvironmentVariable("USE_WEBCIL_FOR_TESTS") is "true";
         internal static readonly string? SdkDirName                = Environment.GetEnvironmentVariable("SDK_DIR_NAME");
         internal static readonly string? WasiSdkPath               = Environment.GetEnvironmentVariable("WASI_SDK_PATH");
+        internal static readonly bool WorkloadsTestPreviousVersions = Environment.GetEnvironmentVariable("WORKLOADS_TEST_PREVIOUS_VERSIONS") is "true";
     }
 }
diff --git a/src/mono/wasm/Wasm.Build.Tests/Templates/WasmTemplateTests.cs b/src/mono/wasm/Wasm.Build.Tests/Templates/WasmTemplateTests.cs
index b1927711236c8c..ac20f6f784513e 100644
--- a/src/mono/wasm/Wasm.Build.Tests/Templates/WasmTemplateTests.cs
+++ b/src/mono/wasm/Wasm.Build.Tests/Templates/WasmTemplateTests.cs
@@ -2,6 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using System;
+using System.Collections.Generic;
 using System.IO;
 using System.Text;
 using System.Threading.Tasks;
@@ -452,13 +453,21 @@ public void ConsolePublishAndRun(string config, bool aot, bool relinking)
             Assert.Contains("args[2] = z", res.Output);
         }
 
+        public static IEnumerable<object?[]> BrowserBuildAndRunTestData()
+        {
+            yield return new object?[] { "", BuildTestBase.DefaultTargetFramework, DefaultRuntimeAssetsRelativePath };
+            yield return new object?[] { "-f net9.0", "net9.0", DefaultRuntimeAssetsRelativePath };
+
+            if (EnvironmentVariables.WorkloadsTestPreviousVersions)
+                yield return new object?[] { "-f net8.0", "net8.0", DefaultRuntimeAssetsRelativePath };
+
+            // ActiveIssue("https://github.com/dotnet/runtime/issues/90979")
+            // yield return new object?[] { "", BuildTestBase.DefaultTargetFramework, "./" };
+            // yield return new object?[] { "-f net8.0", "net8.0", "./" };
+        }
+
         [Theory]
-        [InlineData("", BuildTestBase.DefaultTargetFramework, DefaultRuntimeAssetsRelativePath)]
-        [InlineData("-f net9.0", "net9.0", DefaultRuntimeAssetsRelativePath)]
-        [InlineData("-f net8.0", "net8.0", DefaultRuntimeAssetsRelativePath)]
-        // [ActiveIssue("https://github.com/dotnet/runtime/issues/90979")]
-        // [InlineData("", BuildTestBase.DefaultTargetFramework, "./")]
-        // [InlineData("-f net8.0", "net8.0", "./")]
+        [MemberData(nameof(BrowserBuildAndRunTestData))]
         public async Task BrowserBuildAndRun(string extraNewArgs, string targetFramework, string runtimeAssetsRelativePath)
         {
             string config = "Debug";