Index: DamEngine/trunk/src/Deltares.DamEngine.IntegrationTests/IntegrationTests/OperationalGrebbedijkTests.cs
===================================================================
diff -u -r3520 -r3620
--- DamEngine/trunk/src/Deltares.DamEngine.IntegrationTests/IntegrationTests/OperationalGrebbedijkTests.cs	(.../OperationalGrebbedijkTests.cs)	(revision 3520)
+++ DamEngine/trunk/src/Deltares.DamEngine.IntegrationTests/IntegrationTests/OperationalGrebbedijkTests.cs	(.../OperationalGrebbedijkTests.cs)	(revision 3620)
@@ -79,7 +79,7 @@
                 dikeLocation.Scenarios.Add(scenario);
             }
             string result = engineInterface.Validate();
-            Assert.IsTrue(result == null, "Validation must succeed but does not, see validation output xml in debugger");
+            Assert.IsNull(result, "Validation must succeed but does not, see validation output xml in debugger");
             string outputString = engineInterface.Run();
             File.WriteAllText(outputFileName, outputString, Encoding.Unicode);
             Assert.IsNotNull(outputString);