diff --git a/WpfViewModelFirst.Tests/MainWindowViewModelTests.cs b/WpfViewModelFirst.Tests/MainWindowViewModelTests.cs
index 8d88df0..d867a46 100644
--- a/WpfViewModelFirst.Tests/MainWindowViewModelTests.cs
+++ b/WpfViewModelFirst.Tests/MainWindowViewModelTests.cs
@@ -80,7 +80,7 @@ namespace WpfViewModelFirst.Tests
             TaskCompletionSource<bool> taskCompletionSource = new();
             main.ItHappened += () => taskCompletionSource.SetResult(true);
 
-            Task.Run(() =>
+            Task run = new(() =>
             {
                 DispatcherFrame frame = new();
                 frame.Dispatcher.Invoke(
@@ -91,6 +91,7 @@ namespace WpfViewModelFirst.Tests
                     });
                 Dispatcher.PushFrame(frame);
             });
+            run.Start();
             await taskCompletionSource.Task.WaitAsync(CancellationToken.None);
             Assert.IsType<Part2ViewModel>(main.CurrentViewModel);
         }
@@ -104,7 +105,7 @@ namespace WpfViewModelFirst.Tests
             TaskCompletionSource<bool> taskCompletionSource = new();
             main.ItHappened += () => taskCompletionSource.SetResult(true);
 
-            Task.Run(() =>
+            Task run = new(() =>
             {
                 DispatcherFrame frame = new();
                 frame.Dispatcher.Invoke(
@@ -115,6 +116,7 @@ namespace WpfViewModelFirst.Tests
                     });
                 Dispatcher.PushFrame(frame);
             });
+            run.Start();
             await taskCompletionSource.Task.WaitAsync(CancellationToken.None);
             Assert.Single(main.Strings);
         }