Index: Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Service.Test/HeightStructuresCalculationActivityFactoryTest.cs
===================================================================
diff -u -r21aa790cf953408179b21b73040628307d296ff2 -r693915c62f33c1b9832734c2600a45202a4f4f1f
--- Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Service.Test/HeightStructuresCalculationActivityFactoryTest.cs	(.../HeightStructuresCalculationActivityFactoryTest.cs)	(revision 21aa790cf953408179b21b73040628307d296ff2)
+++ Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Service.Test/HeightStructuresCalculationActivityFactoryTest.cs	(.../HeightStructuresCalculationActivityFactoryTest.cs)	(revision 693915c62f33c1b9832734c2600a45202a4f4f1f)
@@ -110,10 +110,9 @@
             IAssessmentSection assessmentSection = AssessmentSectionHelper.CreateAssessmentSectionStub(failureMechanism,
                                                                                                        mocks,
                                                                                                        validFilePath);
-
             mocks.ReplayAll();
 
-            StructuresCalculation<HeightStructuresInput> calculation = CreateCalculation();
+            StructuresCalculation<HeightStructuresInput> calculation = CreateValidCalculation();
 
             // Call
             CalculatableActivity activity = HeightStructuresCalculationActivityFactory.CreateCalculationActivity(calculation,
@@ -189,8 +188,8 @@
                                                                                                        validFilePath);
             mocks.ReplayAll();
 
-            StructuresCalculation<HeightStructuresInput> calculation1 = CreateCalculation();
-            StructuresCalculation<HeightStructuresInput> calculation2 = CreateCalculation();
+            StructuresCalculation<HeightStructuresInput> calculation1 = CreateValidCalculation();
+            StructuresCalculation<HeightStructuresInput> calculation2 = CreateValidCalculation();
 
             var calculations = new CalculationGroup
             {
@@ -252,11 +251,10 @@
             IAssessmentSection assessmentSection = AssessmentSectionHelper.CreateAssessmentSectionStub(failureMechanism,
                                                                                                        mocks,
                                                                                                        validFilePath);
-
             mocks.ReplayAll();
 
-            StructuresCalculation<HeightStructuresInput> calculation1 = CreateCalculation();
-            StructuresCalculation<HeightStructuresInput> calculation2 = CreateCalculation();
+            StructuresCalculation<HeightStructuresInput> calculation1 = CreateValidCalculation();
+            StructuresCalculation<HeightStructuresInput> calculation2 = CreateValidCalculation();
 
             failureMechanism.CalculationsGroup.Children.AddRange(new[]
             {
@@ -277,7 +275,7 @@
             mocks.VerifyAll();
         }
 
-        private static StructuresCalculation<HeightStructuresInput> CreateCalculation()
+        private static StructuresCalculation<HeightStructuresInput> CreateValidCalculation()
         {
             return new TestHeightStructuresCalculation
             {
@@ -303,8 +301,9 @@
             {
                 activity.Run();
 
-                Assert.AreEqual(calculation.InputParameters.FailureProbabilityStructureWithErosion, 
-                                testCalculator.ReceivedInputs.Single().Variables.Single(v => v.VariableId == 105).Value);
+                StructuresOvertoppingCalculationInput actualInput = testCalculator.ReceivedInputs.Single();
+                Assert.AreEqual(calculation.InputParameters.FailureProbabilityStructureWithErosion,
+                                actualInput.Variables.Single(v => v.VariableId == 105).Value);
             }
 
             mocks.VerifyAll();