diff --git a/src/System.Windows.Forms/tests/IntegrationTests/DesignSurface/DesignSurfaceExt/PropertyGridExt.cs b/src/System.Windows.Forms/tests/IntegrationTests/DesignSurface/DesignSurfaceExt/PropertyGridExt.cs
index 3b239e4bb76..f7d93a10ac3 100644
--- a/src/System.Windows.Forms/tests/IntegrationTests/DesignSurface/DesignSurfaceExt/PropertyGridExt.cs
+++ b/src/System.Windows.Forms/tests/IntegrationTests/DesignSurface/DesignSurfaceExt/PropertyGridExt.cs
@@ -33,6 +33,7 @@ protected override void Dispose(bool disposing)
         base.Dispose(disposing);
     }
 
+    [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
     public IDesignerHost DesignerHost
     {
         get