Index: Ringtoets/Common/test/Ringtoets.Common.Forms.Test/PresentationObjects/FailureMechanismContributionContextTest.cs
===================================================================
diff -u -rce31448a066c084f755439f3e7d453bfb042b291 -r438a524144f283209902ae89f058a134380c9538
--- Ringtoets/Common/test/Ringtoets.Common.Forms.Test/PresentationObjects/FailureMechanismContributionContextTest.cs	(.../FailureMechanismContributionContextTest.cs)	(revision ce31448a066c084f755439f3e7d453bfb042b291)
+++ Ringtoets/Common/test/Ringtoets.Common.Forms.Test/PresentationObjects/FailureMechanismContributionContextTest.cs	(.../FailureMechanismContributionContextTest.cs)	(revision 438a524144f283209902ae89f058a134380c9538)
@@ -67,8 +67,8 @@
             TestDelegate call = () => new FailureMechanismContributionContext(contribution, null);
 
             // Assert
-            const string expectedMessage = "Assessment section cannot be null.";
-            TestHelper.AssertThrowsArgumentExceptionAndTestMessage<ArgumentNullException>(call, expectedMessage);
+            var exception = Assert.Throws<ArgumentNullException>(call);
+            Assert.AreEqual("contributionOwner", exception.ParamName);
         }
     }
 }
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