diff --git a/samples/TestApplication/Program.cs b/samples/TestApplication/Program.cs
index bfbb8a17ce..a67f6881da 100644
--- a/samples/TestApplication/Program.cs
+++ b/samples/TestApplication/Program.cs
@@ -138,6 +138,7 @@ namespace TestApplication
 
             container.Classes.Add(":container");
 
+            DevTools.Attach(window);
             window.Show();
             Application.Current.Run(window);
         }