From 216d42f3c1787839518c3787acfffcfd162074a5 Mon Sep 17 00:00:00 2001
From: Tom Longhurst <30480171+thomhurst@users.noreply.github.com>
Date: Thu, 28 May 2026 18:06:05 +0100
Subject: [PATCH 1/2] perf: use TryAdd in TestDependencyResolver dependency
 dedupe (#6042)

---
 TUnit.Engine/Services/TestDependencyResolver.cs | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/TUnit.Engine/Services/TestDependencyResolver.cs b/TUnit.Engine/Services/TestDependencyResolver.cs
index 0ef7b5e232..212ae57432 100644
--- a/TUnit.Engine/Services/TestDependencyResolver.cs
+++ b/TUnit.Engine/Services/TestDependencyResolver.cs
@@ -110,10 +110,7 @@ private bool ResolveDependenciesForTest(AbstractExecutableTest test)
                         continue;
                     }
 
-                    if (!uniqueDependencies.ContainsKey(dep.Test))
-                    {
-                        uniqueDependencies[dep.Test] = dep;
-                    }
+                    uniqueDependencies.TryAdd(dep.Test, dep);
                 }
 
                 test.Dependencies = uniqueDependencies.Values.ToArray();

From 57dc8bc5483edbb2c460624669c96389907e93a2 Mon Sep 17 00:00:00 2001
From: Tom Longhurst <30480171+thomhurst@users.noreply.github.com>
Date: Thu, 28 May 2026 18:32:00 +0100
Subject: [PATCH 2/2] perf: also apply TryAdd in
 ResolveDependenciesForTestLockFree

Mirror the dedupe substitution in the sibling lock-free batch path
so both methods share the same TryAdd spelling. Per reviewer
feedback on PR #6068.
---
 TUnit.Engine/Services/TestDependencyResolver.cs | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/TUnit.Engine/Services/TestDependencyResolver.cs b/TUnit.Engine/Services/TestDependencyResolver.cs
index 212ae57432..986332bb40 100644
--- a/TUnit.Engine/Services/TestDependencyResolver.cs
+++ b/TUnit.Engine/Services/TestDependencyResolver.cs
@@ -255,10 +255,7 @@ private void ResolveDependenciesForTestLockFree(AbstractExecutableTest test)
                     continue;
                 }
 
-                if (!uniqueDependencies.ContainsKey(dep.Test))
-                {
-                    uniqueDependencies[dep.Test] = dep;
-                }
+                uniqueDependencies.TryAdd(dep.Test, dep);
             }
 
             test.Dependencies = uniqueDependencies.Values.ToArray();