diff --git a/src/Windows/Perspex.Designer/AppHost/PerspexAppHost.cs b/src/Windows/Perspex.Designer/AppHost/PerspexAppHost.cs
index a26808a507..8cc1dc5096 100644
--- a/src/Windows/Perspex.Designer/AppHost/PerspexAppHost.cs
+++ b/src/Windows/Perspex.Designer/AppHost/PerspexAppHost.cs
@@ -177,7 +177,6 @@ namespace Perspex.Designer.AppHost
 
         private void DoInit(string targetExe, StringBuilder logger)
         {
-            MessageBox.Show("WAT");
             _appDir = Path.GetFullPath(Path.GetDirectoryName(targetExe));
             Directory.SetCurrentDirectory(_appDir);
             Action<string> log = s =>