Index: Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Integration.Test/GrassCoverErosionOutwardsWaveConditionsCalculationActivityIntegrationTest.cs
===================================================================
diff -u -r736f04ea6f24399148ab8efd7f3b03ae8f8f56b5 -r6c049c504e7f599a8cebb26ae37fcd82b03782f2
--- Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Integration.Test/GrassCoverErosionOutwardsWaveConditionsCalculationActivityIntegrationTest.cs	(.../GrassCoverErosionOutwardsWaveConditionsCalculationActivityIntegrationTest.cs)	(revision 736f04ea6f24399148ab8efd7f3b03ae8f8f56b5)
+++ Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Integration.Test/GrassCoverErosionOutwardsWaveConditionsCalculationActivityIntegrationTest.cs	(.../GrassCoverErosionOutwardsWaveConditionsCalculationActivityIntegrationTest.cs)	(revision 6c049c504e7f599a8cebb26ae37fcd82b03782f2)
@@ -357,9 +357,10 @@
         }
 
         [Test]
-        [TestCase(true, null)]
-        [TestCase(false, "An error occurred")]
-        [TestCase(true, "An error occurred")]
+        [TestCaseSource(typeof(HydraRingCalculatorTestCaseProvider), nameof(HydraRingCalculatorTestCaseProvider.GetCalculatorFailingConditions), new object[]
+        {
+            nameof(Run_ErrorInCalculation_ActivityStateFailed)
+        })]
         public void Run_ErrorInCalculation_ActivityStateFailed(bool endInFailure, string lastErrorFileContent)
         {
             // Setup
@@ -403,8 +404,12 @@
         }
 
         [Test]
-        public void Run_CalculationFailed_OutputNull()
+        [TestCaseSource(typeof(HydraRingCalculatorTestCaseProvider), nameof(HydraRingCalculatorTestCaseProvider.GetCalculatorFailingConditions), new object[]
         {
+            nameof(Run_CalculationFailed_OutputNull)
+        })]
+        public void Run_CalculationFailed_OutputNull(bool endInFailure, string lastErrorFileContent)
+        {
             // Setup
             var assessmentSection = new AssessmentSection(AssessmentSectionComposition.Dike);
             ImportHydraulicBoundaryDatabase(assessmentSection);
@@ -418,7 +423,8 @@
 
             var waveConditionsCosineCalculator = new TestWaveConditionsCosineCalculator
             {
-                EndInFailure = true
+                EndInFailure = endInFailure,
+                LastErrorFileContent = lastErrorFileContent
             };
 
             int nrOfCalculators = calculation.InputParameters.WaterLevels.Count();