Index: Ringtoets/Integration/test/Ringtoets.Integration.Service.Test/RingtoetsDataSynchronizationServiceTest.cs
===================================================================
diff -u -r178bbc2c5f319a03f6272570fe3668e70bd6dc8c -rd82035163d2c3826a24e898b45e13147edd475a9
--- Ringtoets/Integration/test/Ringtoets.Integration.Service.Test/RingtoetsDataSynchronizationServiceTest.cs	(.../RingtoetsDataSynchronizationServiceTest.cs)	(revision 178bbc2c5f319a03f6272570fe3668e70bd6dc8c)
+++ Ringtoets/Integration/test/Ringtoets.Integration.Service.Test/RingtoetsDataSynchronizationServiceTest.cs	(.../RingtoetsDataSynchronizationServiceTest.cs)	(revision d82035163d2c3826a24e898b45e13147edd475a9)
@@ -356,7 +356,7 @@
         }
 
         [Test]
-        [TestCaseSource(nameof(GrassAndDuneLocations))]
+        [TestCaseSource(nameof(GrassAndDuneLocations2))]
         public void ClearHydraulicBoundaryLocationOutputForFailureMechanisms_FailureMechanismsGrassCoverErosionOutwardsAndDuneLocations_ClearDataAndReturnAffectedLocations(HydraulicBoundaryLocation grassCoverErosionLocation,
                                                                                                                                                            DuneLocation duneLocation,
                                                                                                                                                            IEnumerable<IObservable> expectedAffectedItems)
@@ -475,7 +475,7 @@
         }
 
         [Test]
-        [TestCaseSource(nameof(FailureMechanisms))]
+        [TestCaseSource(nameof(FailureMechanisms2))]
         public void GetHydraulicBoundaryLocationCollectionsOfFailureMechanisms_FailureMechanismsGrassCoverOutwardsAndDuneLocations_ReturnsExpectedAffectedCollections(IEnumerable<IFailureMechanism> availableFailureMechanisms,
                                                                                                                                                      IEnumerable<IObservable> expectedCollections)
         {
@@ -1532,7 +1532,7 @@
                     {
                         grassBoundaryLocationWithOutput
                     }
-                    ).SetName("GrassLocationWithOutput");
+                    ).SetName("DuneLocationWithoutOutputGrassLocationWithOutput");
                 yield return new TestCaseData(
                     new TestHydraulicBoundaryLocation(),
                     duneLocationWithOutput = new TestDuneLocation
@@ -1543,7 +1543,7 @@
                     {
                         duneLocationWithOutput
                     }
-                    ).SetName("DuneLocationWithOutput");
+                    ).SetName("GrassLocationWithoutOutputDuneLocationWithOutput");
                 yield return new TestCaseData(
                     grassBoundaryLocationWithOutput = TestHydraulicBoundaryLocation.CreateFullyCalculated(),
                     duneLocationWithOutput = new TestDuneLocation
@@ -1559,6 +1559,52 @@
             }
         }
 
+        private static IEnumerable<TestCaseData> GrassAndDuneLocations2
+        {
+            get
+            {
+                TestDuneLocation duneLocationWithOutput;
+                TestHydraulicBoundaryLocation grassBoundaryLocationWithOutput;
+
+                yield return new TestCaseData(
+                    new TestHydraulicBoundaryLocation(),
+                    new TestDuneLocation(),
+                    new IObservable[0]
+                    ).SetName("GrassAndDuneLocationNoOutput2");
+                yield return new TestCaseData(
+                    grassBoundaryLocationWithOutput = TestHydraulicBoundaryLocation.CreateFullyCalculated(),
+                    new TestDuneLocation(),
+                    new IObservable[]
+                    {
+                        grassBoundaryLocationWithOutput
+                    }
+                    ).SetName("GrassLocationWithOutput2");
+                yield return new TestCaseData(
+                    new TestHydraulicBoundaryLocation(),
+                    duneLocationWithOutput = new TestDuneLocation
+                    {
+                        Output = new TestDuneLocationOutput()
+                    },
+                    new IObservable[]
+                    {
+                        duneLocationWithOutput
+                    }
+                    ).SetName("DuneLocationWithOutput2");
+                yield return new TestCaseData(
+                    grassBoundaryLocationWithOutput = TestHydraulicBoundaryLocation.CreateFullyCalculated(),
+                    duneLocationWithOutput = new TestDuneLocation
+                    {
+                        Output = new TestDuneLocationOutput()
+                    },
+                    new IObservable[]
+                    {
+                        grassBoundaryLocationWithOutput,
+                        duneLocationWithOutput
+                    }
+                    ).SetName("GrassAndDuneLocationWithOutput2");
+            }
+        }
+
         private static IEnumerable<TestCaseData> HydraulicBoundaryLocationAndGrassAndDuneLocations
         {
             get
@@ -1620,7 +1666,7 @@
                     new IObservable[]
                     {
                         duneLocationWithOutput
-                    }).SetName("DuneLocationWithOutput");
+                    }).SetName("HydraulicBoundaryLocationWithoutOutputDuneLocationWithOutput");
                 yield return new TestCaseData(
                     new TestHydraulicBoundaryLocation(),
                     new TestHydraulicBoundaryLocation(),
@@ -1638,7 +1684,7 @@
                     {
                         grassCoverErosionOutwardsLocation,
                         duneLocationWithOutput
-                    }).SetName("GrassAndDuneLocationWithOutput");
+                    }).SetName("HydraulicBoundaryLocationWithoutOutputGrassAndDuneLocationWithOutput");
                 yield return new TestCaseData(
                     new TestHydraulicBoundaryLocation(),
                     grassCoverErosionOutwardsLocation = TestHydraulicBoundaryLocation.CreateFullyCalculated(),
@@ -1698,6 +1744,54 @@
             }
         }
 
+        private static IEnumerable<TestCaseData> FailureMechanisms2
+        {
+            get
+            {
+                DuneErosionFailureMechanism duneErosionFailureMechanism;
+                GrassCoverErosionOutwardsFailureMechanism grassCoverErosionOutwardsFailureMechanism;
+
+                yield return new TestCaseData(
+                    new IFailureMechanism[]
+                    {
+                        new TestFailureMechanism(),
+                        duneErosionFailureMechanism = new DuneErosionFailureMechanism(),
+                        grassCoverErosionOutwardsFailureMechanism = new GrassCoverErosionOutwardsFailureMechanism()
+                    },
+                    new IObservable[]
+                    {
+                        grassCoverErosionOutwardsFailureMechanism.HydraulicBoundaryLocations,
+                        duneErosionFailureMechanism.DuneLocations
+                    }).SetName("DuneAndGrassFailureMechanism2");
+                yield return new TestCaseData(
+                    new IFailureMechanism[]
+                    {
+                        new TestFailureMechanism()
+                    },
+                    new IObservable[0]).SetName("NoRelevantFailureMechanism2");
+                yield return new TestCaseData(
+                    new IFailureMechanism[]
+                    {
+                        new TestFailureMechanism(),
+                        duneErosionFailureMechanism = new DuneErosionFailureMechanism(),
+                    },
+                    new IObservable[]
+                    {
+                        duneErosionFailureMechanism.DuneLocations
+                    }).SetName("DuneFailureMechanism2");
+                yield return new TestCaseData(
+                    new IFailureMechanism[]
+                    {
+                        new TestFailureMechanism(),
+                        grassCoverErosionOutwardsFailureMechanism = new GrassCoverErosionOutwardsFailureMechanism()
+                    },
+                    new IObservable[]
+                    {
+                        grassCoverErosionOutwardsFailureMechanism.HydraulicBoundaryLocations
+                    }).SetName("GrassFailureMechanism2");
+            }
+        }
+
         #endregion
     }
 }
\ No newline at end of file