Index: Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/PipingCalculationTest.cs
===================================================================
diff -u -r4af59f05cb6ced6464d51c8dff8cb0b8bfca8edd -r28d7428ed418504296e2c686958a4500b910cc32
--- Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/PipingCalculationTest.cs	(.../PipingCalculationTest.cs)	(revision 4af59f05cb6ced6464d51c8dff8cb0b8bfca8edd)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/PipingCalculationTest.cs	(.../PipingCalculationTest.cs)	(revision 28d7428ed418504296e2c686958a4500b910cc32)
@@ -52,7 +52,7 @@
             var calculation = new PipingCalculation(generalInputParameters, semiProbabilisticInputParameters);
 
             // Assert
-            Assert.IsInstanceOf<ICalculationItem>(calculation);
+            Assert.IsInstanceOf<ICalculationBase>(calculation);
             Assert.IsInstanceOf<ICommentable>(calculation);
 
             Assert.AreEqual("Nieuwe berekening", calculation.Name);