diff --git a/Tests/UnitTests/Application/StackExtensionsTests.cs b/Tests/UnitTestsParallelizable/Application/StackExtensionsTests.cs
similarity index 97%
rename from Tests/UnitTests/Application/StackExtensionsTests.cs
rename to Tests/UnitTestsParallelizable/Application/StackExtensionsTests.cs
index e80b6e33e..80b0d91dc 100644
--- a/Tests/UnitTests/Application/StackExtensionsTests.cs
+++ b/Tests/UnitTestsParallelizable/Application/StackExtensionsTests.cs
@@ -1,6 +1,6 @@
-namespace Terminal.Gui.ApplicationTests;
+namespace Terminal.Gui.ApplicationTests;
 
-public class StackExtensionsTests
+public class StackExtensionsTests : UnitTests.Parallelizable.ParallelizableBase
 {
     [Fact]
     public void Stack_Toplevels_Contains ()