Index: Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/PipingOutputCreateExtensionsTest.cs
===================================================================
diff -u -r450de34f5b9bea646121b6e101c849f9f78dfc51 -r02937f67556a7b1d52477b196c62ed50df1cae6d
--- Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/PipingOutputCreateExtensionsTest.cs	(.../PipingOutputCreateExtensionsTest.cs)	(revision 450de34f5b9bea646121b6e101c849f9f78dfc51)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/PipingOutputCreateExtensionsTest.cs	(.../PipingOutputCreateExtensionsTest.cs)	(revision 02937f67556a7b1d52477b196c62ed50df1cae6d)
@@ -67,7 +67,7 @@
             Assert.AreEqual(pipingOutput.UpliftZValue, entity.UpliftZValue);
 
             Assert.AreEqual(0, entity.PipingCalculationOutputEntityId);
-            Assert.IsNull(entity.PipingCalculationEntity);
+            CollectionAssert.IsEmpty(entity.PipingCalculationEntities);
         }
 
         [Test]
@@ -91,7 +91,7 @@
             Assert.IsNull(entity.UpliftZValue);
 
             Assert.AreEqual(0, entity.PipingCalculationOutputEntityId);
-            Assert.IsNull(entity.PipingCalculationEntity);
+            CollectionAssert.IsEmpty(entity.PipingCalculationEntities);
         }
 
         [Test]