Index: Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Service.Test/HeightStructuresCalculationActivityFactoryTest.cs
===================================================================
diff -u -r847c0865b3c3e8478049321fa436a80c1f1ab43b -r21aa790cf953408179b21b73040628307d296ff2
--- Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Service.Test/HeightStructuresCalculationActivityFactoryTest.cs	(.../HeightStructuresCalculationActivityFactoryTest.cs)	(revision 847c0865b3c3e8478049321fa436a80c1f1ab43b)
+++ Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Service.Test/HeightStructuresCalculationActivityFactoryTest.cs	(.../HeightStructuresCalculationActivityFactoryTest.cs)	(revision 21aa790cf953408179b21b73040628307d296ff2)
@@ -303,7 +303,8 @@
             {
                 activity.Run();
 
-                Assert.AreEqual(calculation.InputParameters.FailureProbabilityStructureWithErosion, testCalculator.ReceivedInputs.Single().Variables.ElementAt(11).Value);
+                Assert.AreEqual(calculation.InputParameters.FailureProbabilityStructureWithErosion, 
+                                testCalculator.ReceivedInputs.Single().Variables.Single(v => v.VariableId == 105).Value);
             }
 
             mocks.VerifyAll();