Index: Ringtoets/Common/test/Ringtoets.Common.Data.TestUtil.Test/ObservableTestAssessmentSectionStubTest.cs
===================================================================
diff -u -rd00d30719d5bffa635f40b975e490af4e4c298e9 -r9cdd70c8d4ba76d93b72ef8c1b7df138fa73b0e4
--- Ringtoets/Common/test/Ringtoets.Common.Data.TestUtil.Test/ObservableTestAssessmentSectionStubTest.cs	(.../ObservableTestAssessmentSectionStubTest.cs)	(revision d00d30719d5bffa635f40b975e490af4e4c298e9)
+++ Ringtoets/Common/test/Ringtoets.Common.Data.TestUtil.Test/ObservableTestAssessmentSectionStubTest.cs	(.../ObservableTestAssessmentSectionStubTest.cs)	(revision 9cdd70c8d4ba76d93b72ef8c1b7df138fa73b0e4)
@@ -83,7 +83,7 @@
 
             // Assert
             string message = Assert.Throws<NotImplementedException>(call).Message;
-            var expectedMessage = "Stub only verifies Observable and basic behaviour, use a proper stub when this function is necessary.";
+            const string expectedMessage = "Stub only verifies Observable and basic behaviour, use a proper stub when this function is necessary.";
             Assert.AreEqual(expectedMessage, message);
         }
     }