Index: Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/RingtoetsPluginTest.cs
===================================================================
diff -u -r84afb606e58d67c6342c4f11bf66b042e49f52d6 -r26bfb24de212c4f4224b773a0cb8fb87a2d7a0f0
--- Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/RingtoetsPluginTest.cs	(.../RingtoetsPluginTest.cs)	(revision 84afb606e58d67c6342c4f11bf66b042e49f52d6)
+++ Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/RingtoetsPluginTest.cs	(.../RingtoetsPluginTest.cs)	(revision 26bfb24de212c4f4224b773a0cb8fb87a2d7a0f0)
@@ -541,7 +541,7 @@
             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();