Index: DamEngine/trunk/src/Deltares.DamEngine.Interface.Tests/FillXmlOutputFromDamTests.cs
===================================================================
diff -u -r4624 -r4627
--- DamEngine/trunk/src/Deltares.DamEngine.Interface.Tests/FillXmlOutputFromDamTests.cs	(.../FillXmlOutputFromDamTests.cs)	(revision 4624)
+++ DamEngine/trunk/src/Deltares.DamEngine.Interface.Tests/FillXmlOutputFromDamTests.cs	(.../FillXmlOutputFromDamTests.cs)	(revision 4627)
@@ -478,7 +478,7 @@
     {
         if (!expected.HasValue)
         {
-            Assert.IsNull(actual);
+            Assert.That(actual, Is.Null);
             return;
         }
 
@@ -495,7 +495,7 @@
     {
         if (expected == null)
         {
-            Assert.IsNull(actual);
+            Assert.That(actual, Is.Null);
             return;
         }