Index: Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsCalculationTest.cs
===================================================================
diff -u -rd2f9b4f26f69988ea1c55caaa58af0831152458f -r7e310cacb9c4875ce8e2d60af68a46c4c8b55041
--- Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsCalculationTest.cs	(.../GrassCoverErosionInwardsCalculationTest.cs)	(revision d2f9b4f26f69988ea1c55caaa58af0831152458f)
+++ Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Data.Test/GrassCoverErosionInwardsCalculationTest.cs	(.../GrassCoverErosionInwardsCalculationTest.cs)	(revision 7e310cacb9c4875ce8e2d60af68a46c4c8b55041)
@@ -72,14 +72,13 @@
 
             // Assert
             Assert.IsInstanceOf<ICalculation>(calculation);
-
+            Assert.IsInstanceOf<Observable>(calculation);
             Assert.AreEqual("Nieuwe berekening", calculation.Name);
-            Assert.IsInstanceOf<GrassCoverErosionInwardsInput>(calculation.InputParameters);
+            Assert.IsNotNull(calculation.InputParameters);
             Assert.IsFalse(calculation.HasOutput);
             Assert.IsNull(calculation.Comments);
             Assert.IsNull(calculation.Output);
-            Assert.IsInstanceOf<Observable>(calculation);
-            Assert.AreEqual(normProbabilityInput, calculation.NormProbabilityInput);
+            Assert.AreSame(normProbabilityInput, calculation.NormProbabilityInput);
             AssertDemoInput(calculation.InputParameters);
         }