diff --git a/src/Adapter/MSTest.TestAdapter/Execution/TestExecutionManager.cs b/src/Adapter/MSTest.TestAdapter/Execution/TestExecutionManager.cs
index 51f7e0b8bc..14823a4e32 100644
--- a/src/Adapter/MSTest.TestAdapter/Execution/TestExecutionManager.cs
+++ b/src/Adapter/MSTest.TestAdapter/Execution/TestExecutionManager.cs
@@ -86,7 +86,8 @@ private static Task DefaultFactoryAsync(Func<Task> taskGetter)
         }
         else
         {
-            return taskGetter();
+            // NOTE: If you replace this with `return taskGetter()`, you will break parallel tests.
+            return Task.Run(taskGetter);
         }
     }