Index: DamEngine/trunk/src/Deltares.DamEngine.TestHelpers/GeneralHelper.cs
===================================================================
diff -u -r6573 -r6575
--- DamEngine/trunk/src/Deltares.DamEngine.TestHelpers/GeneralHelper.cs	(.../GeneralHelper.cs)	(revision 6573)
+++ DamEngine/trunk/src/Deltares.DamEngine.TestHelpers/GeneralHelper.cs	(.../GeneralHelper.cs)	(revision 6575)
@@ -93,10 +93,10 @@
         switch (engineInterface.DamProjectData.DamProjectType)
         {
             case DamProjectType.Design:
-                isNoResultAvailable = output.Results.CalculationResults.IsNullOrEmpty();
+                isNoResultAvailable = output.Results.CalculationResults == null || !output.Results.CalculationResults.Any();
                 break;
             default:
-                isNoResultAvailable = output.Results.OperationalOutputTimeSeries.IsNullOrEmpty();
+                isNoResultAvailable = output.Results.OperationalOutputTimeSeries == null || !output.Results.OperationalOutputTimeSeries.Any();
                 break;
         }