Index: Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/PipingCalculationTest.cs
===================================================================
diff -u -r638c0c354f63b4c8be69feb448712b004d8bb933 -rd320e912103d060e7a359846539a67dc54c616a4
--- Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/PipingCalculationTest.cs	(.../PipingCalculationTest.cs)	(revision 638c0c354f63b4c8be69feb448712b004d8bb933)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/PipingCalculationTest.cs	(.../PipingCalculationTest.cs)	(revision d320e912103d060e7a359846539a67dc54c616a4)
@@ -4,6 +4,7 @@
 using Core.Common.Base.Data;
 using NUnit.Framework;
 using Rhino.Mocks;
+using Ringtoets.Common.Data;
 using Ringtoets.HydraRing.Data;
 using Ringtoets.Piping.KernelWrapper.TestUtil;
 
@@ -31,6 +32,7 @@
 
             // Assert
             Assert.IsInstanceOf<IPipingCalculationItem>(calculation);
+            Assert.IsInstanceOf<IComment>(calculation);
 
             Assert.AreEqual("Nieuwe berekening", calculation.Name);