diff --git a/tests/Aspire.Hosting.Tests/MSBuildTests.cs b/tests/Aspire.Hosting.Tests/MSBuildTests.cs
index 8a4fa439fa..e20373ff1e 100644
--- a/tests/Aspire.Hosting.Tests/MSBuildTests.cs
+++ b/tests/Aspire.Hosting.Tests/MSBuildTests.cs
@@ -127,7 +127,8 @@ private static string GetRepoRoot()
     {
         string directory = AppContext.BaseDirectory;
 
-        while (directory != null && !Directory.Exists(Path.Combine(directory, ".git")))
+        // To support git worktrees, check for either a directory or a file named ".git"
+        while (directory != null && !Directory.Exists(Path.Combine(directory, ".git")) && !File.Exists(Path.Combine(directory, ".git")))
         {
             directory = Directory.GetParent(directory)!.FullName;
         }
diff --git a/tests/Shared/WorkloadTesting/BuildEnvironment.cs b/tests/Shared/WorkloadTesting/BuildEnvironment.cs
index c4f7b43f49..d7999a0c71 100644
--- a/tests/Shared/WorkloadTesting/BuildEnvironment.cs
+++ b/tests/Shared/WorkloadTesting/BuildEnvironment.cs
@@ -31,7 +31,8 @@ public BuildEnvironment(bool expectSdkWithWorkload = true, Action<string, string
         DirectoryInfo? solutionRoot = new(AppContext.BaseDirectory);
         while (solutionRoot != null)
         {
-            if (Directory.Exists(Path.Combine(solutionRoot.FullName, ".git")))
+            // To support git worktrees, check for either a directory or a file named ".git"
+            if (Directory.Exists(Path.Combine(solutionRoot.FullName, ".git")) || File.Exists(Path.Combine(solutionRoot.FullName, ".git")))
             {
                 break;
             }