Index: Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Service.Test/ClosingStructureDataSynchronizationServiceTest.cs
===================================================================
diff -u -r8905298103eb01ce13dd5c1a2f267f879d4fda3e -rce9e1d476f00cfb42ce2a8ab6c762baf5abfd97b
--- Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Service.Test/ClosingStructureDataSynchronizationServiceTest.cs	(.../ClosingStructureDataSynchronizationServiceTest.cs)	(revision 8905298103eb01ce13dd5c1a2f267f879d4fda3e)
+++ Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Service.Test/ClosingStructureDataSynchronizationServiceTest.cs	(.../ClosingStructureDataSynchronizationServiceTest.cs)	(revision ce9e1d476f00cfb42ce2a8ab6c762baf5abfd97b)
@@ -33,6 +33,7 @@
 using Ringtoets.Common.Data.Probability;
 using Ringtoets.Common.Data.Structures;
 using Ringtoets.Common.Data.TestUtil;
+using Ringtoets.Common.Service;
 
 namespace Ringtoets.ClosingStructures.Service.Test
 {
@@ -277,24 +278,31 @@
             // Setup
             ClosingStructuresFailureMechanism failureMechanism = CreateFullyConfiguredFailureMechanism();
 
+            var expectedRemovedObjects = failureMechanism.Sections.OfType<object>()
+                                                         .Concat(failureMechanism.SectionResults)
+                                                         .Concat(failureMechanism.CalculationsGroup.GetAllChildrenRecursive())
+                                                         .Concat(failureMechanism.ForeshoreProfiles)
+                                                         .Concat(failureMechanism.ClosingStructures)
+                                                         .ToArray();
+
             // Call
-            IEnumerable<IObservable> observables = ClosingStructuresDataSynchronizationService.ClearReferenceLineDependentData(failureMechanism);
+            ClearResults results = ClosingStructuresDataSynchronizationService.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.CalculationsGroup.Children);
             CollectionAssert.IsEmpty(failureMechanism.ForeshoreProfiles);
             CollectionAssert.IsEmpty(failureMechanism.ClosingStructures);
 
-            IObservable[] array = observables.ToArray();
+            IObservable[] array = results.ChangedObjects.ToArray();
             Assert.AreEqual(4, array.Length);
             CollectionAssert.Contains(array, failureMechanism);
             CollectionAssert.Contains(array, failureMechanism.CalculationsGroup);
             CollectionAssert.Contains(array, failureMechanism.ForeshoreProfiles);
             CollectionAssert.Contains(array, failureMechanism.ClosingStructures);
+
+            CollectionAssert.AreEquivalent(expectedRemovedObjects, results.DeletedObjects);
         }
 
         [Test]