Index: Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Integration.Test/GrassCoverErosionInwardsCalculationActivityIntegrationTest.cs
===================================================================
diff -u -rbd73023d5f8926a411da214fb5ce522056a0e30a -r2d900083e4f3a92af1acc0584aa3e2bc9155b8cb
--- Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Integration.Test/GrassCoverErosionInwardsCalculationActivityIntegrationTest.cs	(.../GrassCoverErosionInwardsCalculationActivityIntegrationTest.cs)	(revision bd73023d5f8926a411da214fb5ce522056a0e30a)
+++ Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Integration.Test/GrassCoverErosionInwardsCalculationActivityIntegrationTest.cs	(.../GrassCoverErosionInwardsCalculationActivityIntegrationTest.cs)	(revision 2d900083e4f3a92af1acc0584aa3e2bc9155b8cb)
@@ -35,6 +35,7 @@
 using Ringtoets.Common.IO.FileImporters;
 using Ringtoets.GrassCoverErosionInwards.Data;
 using Ringtoets.GrassCoverErosionInwards.Service;
+using Ringtoets.HydraRing.Calculation.Calculator.Factory;
 using Ringtoets.HydraRing.Calculation.TestUtil.Calculator;
 using Ringtoets.HydraRing.Data;
 using Ringtoets.Integration.Data;
@@ -199,24 +200,31 @@
 
             var activity = new GrassCoverErosionInwardsCalculationActivity(calculation, testDataPath, assessmentSection.GrassCoverErosionInwards, assessmentSection);
 
-            // Call
-            Action call = () => activity.Run();
-
-            // Assert
-            TestHelper.AssertLogMessages(call, messages =>
+            using (new HydraRingCalculatorFactoryConfig())
             {
-                var msgs = messages.ToArray();
-                Assert.AreEqual(7, msgs.Length);
-                StringAssert.StartsWith(string.Format("Validatie van '{0}' gestart om: ", calculation.Name), msgs[0]);
-                StringAssert.StartsWith(string.Format("Validatie van '{0}' beëindigd om: ", calculation.Name), msgs[1]);
-                StringAssert.StartsWith(string.Format("Berekening van '{0}' gestart om: ", calculation.Name), msgs[2]);
-                StringAssert.StartsWith("Overloop berekening is uitgevoerd op de tijdelijke locatie:", msgs[3]);
-                StringAssert.StartsWith(string.Format("De HBN berekening voor grasbekleding erosie kruin en binnentalud '{0}' is niet gelukt.", calculation.Name), msgs[4]);
-                StringAssert.StartsWith("Dijkhoogte berekening is uitgevoerd op de tijdelijke locatie:", msgs[5]);
-                StringAssert.StartsWith(string.Format("Berekening van '{0}' beëindigd om: ", calculation.Name), msgs[6]);
-            });
-            Assert.AreEqual(ActivityState.Executed, activity.State);
-            mocks.VerifyAll(); // Expect no calls on the observer
+                var calculator = ((TestHydraRingCalculatorFactory)HydraRingCalculatorFactory.Instance).DikeHeightCalculator;
+                calculator.DikeHeight = double.NaN;
+                calculator.EndInFailure = true;
+
+                // Call
+                Action call = () => activity.Run();
+
+                // Assert
+                TestHelper.AssertLogMessages(call, messages =>
+                {
+                    var msgs = messages.ToArray();
+                    Assert.AreEqual(7, msgs.Length);
+                    StringAssert.StartsWith(string.Format("Validatie van '{0}' gestart om: ", calculation.Name), msgs[0]);
+                    StringAssert.StartsWith(string.Format("Validatie van '{0}' beëindigd om: ", calculation.Name), msgs[1]);
+                    StringAssert.StartsWith(string.Format("Berekening van '{0}' gestart om: ", calculation.Name), msgs[2]);
+                    StringAssert.StartsWith("Overloop berekening is uitgevoerd op de tijdelijke locatie:", msgs[3]);
+                    StringAssert.StartsWith(string.Format("De HBN berekening voor grasbekleding erosie kruin en binnentalud '{0}' is niet gelukt.", calculation.Name), msgs[4]);
+                    StringAssert.StartsWith("Dijkhoogte berekening is uitgevoerd op de tijdelijke locatie:", msgs[5]);
+                    StringAssert.StartsWith(string.Format("Berekening van '{0}' beëindigd om: ", calculation.Name), msgs[6]);
+                });
+                Assert.AreEqual(ActivityState.Executed, activity.State);
+                mocks.VerifyAll(); // Expect no calls on the observer
+            }
         }
 
         [Test]
@@ -458,8 +466,15 @@
 
             var activity = new GrassCoverErosionInwardsCalculationActivity(calculation, testDataPath, assessmentSection.GrassCoverErosionInwards, assessmentSection);
 
-            activity.Run();
+            using (new HydraRingCalculatorFactoryConfig())
+            {
+                var calculator = ((TestHydraRingCalculatorFactory) HydraRingCalculatorFactory.Instance).DikeHeightCalculator;
+                calculator.DikeHeight = double.NaN;
+                calculator.EndInFailure = true;
 
+                activity.Run();
+            }
+
             // Call
             activity.Finish();