Index: Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/RingtoetsPluginTest.cs
===================================================================
diff -u -rae8af28b6d5528cbbaa329dcffea6c8dbbe2a39f -r68fb2bea16670fc88e626118a808560690610e57
--- Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/RingtoetsPluginTest.cs	(.../RingtoetsPluginTest.cs)	(revision ae8af28b6d5528cbbaa329dcffea6c8dbbe2a39f)
+++ Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/RingtoetsPluginTest.cs	(.../RingtoetsPluginTest.cs)	(revision 68fb2bea16670fc88e626118a808560690610e57)
@@ -544,7 +544,7 @@
             var mainWindowMock = mockRepository.StrictMock<IMainWindow>();
             var documentViewControllerMock = mockRepository.StrictMock<IDocumentViewController>();
             var guiMock = mockRepository.StrictMock<IGui>();
-            guiMock.Expect(g => g.MainWindow).Return(mainWindowMock);
+            guiMock.Expect(g => g.MainWindow).Return(mainWindowMock).Repeat.AtLeastOnce();
             guiMock.Expect(g => g.DocumentViewController).Return(documentViewControllerMock);
             guiMock.Expect(g => g.ProjectOpened += null).IgnoreArguments();
             guiMock.Stub(g => g.ProjectOpened -= null).IgnoreArguments();