Index: Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Service.Test/GrassCoverErosionOutwardsDataSynchronizationServiceTest.cs
===================================================================
diff -u -re182f6f394aa75e739467a77e7bcacd9a8b25429 -rce9e1d476f00cfb42ce2a8ab6c762baf5abfd97b
--- Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Service.Test/GrassCoverErosionOutwardsDataSynchronizationServiceTest.cs	(.../GrassCoverErosionOutwardsDataSynchronizationServiceTest.cs)	(revision e182f6f394aa75e739467a77e7bcacd9a8b25429)
+++ Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Service.Test/GrassCoverErosionOutwardsDataSynchronizationServiceTest.cs	(.../GrassCoverErosionOutwardsDataSynchronizationServiceTest.cs)	(revision ce9e1d476f00cfb42ce2a8ab6c762baf5abfd97b)
@@ -26,6 +26,7 @@
 using NUnit.Framework;
 using Ringtoets.Common.Data.Calculation;
 using Ringtoets.Common.Data.Hydraulics;
+using Ringtoets.Common.Service;
 using Ringtoets.GrassCoverErosionOutwards.Data;
 using Ringtoets.Revetment.Data;
 
@@ -176,22 +177,28 @@
             // Setup
             GrassCoverErosionOutwardsFailureMechanism failureMechanism = CreateFullyConfiguredFailureMechanism();
 
+            var expectedRemovedObjects = failureMechanism.Sections.OfType<object>()
+                                                         .Concat(failureMechanism.SectionResults)
+                                                         .Concat(failureMechanism.WaveConditionsCalculationGroup.GetAllChildrenRecursive())
+                                                         .Concat(failureMechanism.ForeshoreProfiles)
+                                                         .ToArray();
+
             // Call
-            IEnumerable<IObservable> observables = GrassCoverErosionOutwardsDataSynchronizationService.ClearReferenceLineDependentData(failureMechanism);
+            ClearResults results = GrassCoverErosionOutwardsDataSynchronizationService.ClearReferenceLineDependentData(failureMechanism);
 
             // Assert
-            // Note: To make sure the clear is performed regardless of what is done with
-            // the return result, no ToArray() should be called before these assertions:
             CollectionAssert.IsEmpty(failureMechanism.Sections);
             CollectionAssert.IsEmpty(failureMechanism.SectionResults);
             CollectionAssert.IsEmpty(failureMechanism.WaveConditionsCalculationGroup.Children);
             CollectionAssert.IsEmpty(failureMechanism.ForeshoreProfiles);
 
-            IObservable[] array = observables.ToArray();
+            IObservable[] array = results.ChangedObjects.ToArray();
             Assert.AreEqual(3, array.Length);
             CollectionAssert.Contains(array, failureMechanism);
             CollectionAssert.Contains(array, failureMechanism.WaveConditionsCalculationGroup);
             CollectionAssert.Contains(array, failureMechanism.ForeshoreProfiles);
+
+            CollectionAssert.AreEquivalent(expectedRemovedObjects, results.DeletedObjects);
         }
 
         private static GrassCoverErosionOutwardsFailureMechanism CreateFullyConfiguredFailureMechanism()