Index: Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Plugin.Test/TreeNodeInfos/GrassCoverErosionOutwardsWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs
===================================================================
diff -u -r8b60c9e846480f3ffeeb263bfea5d3367bf6bee3 -rb6e6c2d3cc811c3365c0265d1ccd70f2ebac99ed
--- Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Plugin.Test/TreeNodeInfos/GrassCoverErosionOutwardsWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs	(.../GrassCoverErosionOutwardsWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs)	(revision 8b60c9e846480f3ffeeb263bfea5d3367bf6bee3)
+++ Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Plugin.Test/TreeNodeInfos/GrassCoverErosionOutwardsWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs	(.../GrassCoverErosionOutwardsWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs)	(revision b6e6c2d3cc811c3365c0265d1ccd70f2ebac99ed)
@@ -218,6 +218,7 @@
             Assert.AreSame(calculationItem, children[0]);
             var returnedCalculationGroupContext = (GrassCoverErosionOutwardsWaveConditionsCalculationGroupContext) children[1];
             Assert.AreSame(childGroup, returnedCalculationGroupContext.WrappedData);
+            Assert.AreSame(failureMechanism.WaveConditionsCalculationGroup, returnedCalculationGroupContext.Parent);
             Assert.AreSame(failureMechanism, returnedCalculationGroupContext.FailureMechanism);
         }
 
Index: Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Plugin.Test/TreeNodeInfos/HydraulicBoundariesGroupContextTreeNodeInfoTest.cs
===================================================================
diff -u -rfcd32c8e949b4581cc20adcaa7cf7639fcb69d20 -rb6e6c2d3cc811c3365c0265d1ccd70f2ebac99ed
--- Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Plugin.Test/TreeNodeInfos/HydraulicBoundariesGroupContextTreeNodeInfoTest.cs	(.../HydraulicBoundariesGroupContextTreeNodeInfoTest.cs)	(revision fcd32c8e949b4581cc20adcaa7cf7639fcb69d20)
+++ Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Plugin.Test/TreeNodeInfos/HydraulicBoundariesGroupContextTreeNodeInfoTest.cs	(.../HydraulicBoundariesGroupContextTreeNodeInfoTest.cs)	(revision b6e6c2d3cc811c3365c0265d1ccd70f2ebac99ed)
@@ -191,6 +191,7 @@
 
             var waveConditionsCalculationGroupContext = (GrassCoverErosionOutwardsWaveConditionsCalculationGroupContext) children[2];
             Assert.AreSame(failureMechanism.WaveConditionsCalculationGroup, waveConditionsCalculationGroupContext.WrappedData);
+            Assert.IsNull(waveConditionsCalculationGroupContext.Parent);
         }
 
         [Test]
Index: Ringtoets/StabilityStoneCover/test/Ringtoets.StabilityStoneCover.Plugin.Test/TreeNodeInfos/StabilityStoneCoverFailureMechanismContextTreeNodeInfoTest.cs
===================================================================
diff -u -r94f2ec1496623ae488b567f883e66b4d26243441 -rb6e6c2d3cc811c3365c0265d1ccd70f2ebac99ed
--- Ringtoets/StabilityStoneCover/test/Ringtoets.StabilityStoneCover.Plugin.Test/TreeNodeInfos/StabilityStoneCoverFailureMechanismContextTreeNodeInfoTest.cs	(.../StabilityStoneCoverFailureMechanismContextTreeNodeInfoTest.cs)	(revision 94f2ec1496623ae488b567f883e66b4d26243441)
+++ Ringtoets/StabilityStoneCover/test/Ringtoets.StabilityStoneCover.Plugin.Test/TreeNodeInfos/StabilityStoneCoverFailureMechanismContextTreeNodeInfoTest.cs	(.../StabilityStoneCoverFailureMechanismContextTreeNodeInfoTest.cs)	(revision b6e6c2d3cc811c3365c0265d1ccd70f2ebac99ed)
@@ -207,6 +207,7 @@
 
             var hydraulicBoundariesCalculationGroup = (StabilityStoneCoverWaveConditionsCalculationGroupContext) children[1];
             Assert.AreSame(failureMechanism.WaveConditionsCalculationGroup, hydraulicBoundariesCalculationGroup.WrappedData);
+            Assert.IsNull(hydraulicBoundariesCalculationGroup.Parent);
             Assert.AreSame(failureMechanism, hydraulicBoundariesCalculationGroup.FailureMechanism);
 
             var outputsFolder = (CategoryTreeFolder) children[2];
Index: Ringtoets/StabilityStoneCover/test/Ringtoets.StabilityStoneCover.Plugin.Test/TreeNodeInfos/StabilityStoneCoverWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs
===================================================================
diff -u -r8b60c9e846480f3ffeeb263bfea5d3367bf6bee3 -rb6e6c2d3cc811c3365c0265d1ccd70f2ebac99ed
--- Ringtoets/StabilityStoneCover/test/Ringtoets.StabilityStoneCover.Plugin.Test/TreeNodeInfos/StabilityStoneCoverWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs	(.../StabilityStoneCoverWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs)	(revision 8b60c9e846480f3ffeeb263bfea5d3367bf6bee3)
+++ Ringtoets/StabilityStoneCover/test/Ringtoets.StabilityStoneCover.Plugin.Test/TreeNodeInfos/StabilityStoneCoverWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs	(.../StabilityStoneCoverWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs)	(revision b6e6c2d3cc811c3365c0265d1ccd70f2ebac99ed)
@@ -194,6 +194,7 @@
             Assert.AreSame(calculationItem, children[0]);
             var returnedCalculationGroupContext = (StabilityStoneCoverWaveConditionsCalculationGroupContext) children[1];
             Assert.AreSame(childGroup, returnedCalculationGroupContext.WrappedData);
+            Assert.AreSame(failureMechanism.WaveConditionsCalculationGroup, returnedCalculationGroupContext.Parent);
             Assert.AreSame(failureMechanism, returnedCalculationGroupContext.FailureMechanism);
         }
 
Index: Ringtoets/WaveImpactAsphaltCover/test/Ringtoets.WaveImpactAsphaltCover.Plugin.Test/TreeNodeInfos/WaveImpactAsphaltCoverFailureMechanismContextTreeNodeInfoTest.cs
===================================================================
diff -u -r08d25a2d4cd349395730ef39d3abf2cc51c30508 -rb6e6c2d3cc811c3365c0265d1ccd70f2ebac99ed
--- Ringtoets/WaveImpactAsphaltCover/test/Ringtoets.WaveImpactAsphaltCover.Plugin.Test/TreeNodeInfos/WaveImpactAsphaltCoverFailureMechanismContextTreeNodeInfoTest.cs	(.../WaveImpactAsphaltCoverFailureMechanismContextTreeNodeInfoTest.cs)	(revision 08d25a2d4cd349395730ef39d3abf2cc51c30508)
+++ Ringtoets/WaveImpactAsphaltCover/test/Ringtoets.WaveImpactAsphaltCover.Plugin.Test/TreeNodeInfos/WaveImpactAsphaltCoverFailureMechanismContextTreeNodeInfoTest.cs	(.../WaveImpactAsphaltCoverFailureMechanismContextTreeNodeInfoTest.cs)	(revision b6e6c2d3cc811c3365c0265d1ccd70f2ebac99ed)
@@ -224,6 +224,7 @@
 
                 var hydraulicBoundariesCalculationGroup = (WaveImpactAsphaltCoverWaveConditionsCalculationGroupContext) children[1];
                 Assert.AreSame(failureMechanism.WaveConditionsCalculationGroup, hydraulicBoundariesCalculationGroup.WrappedData);
+                Assert.IsNull(hydraulicBoundariesCalculationGroup.Parent);
                 Assert.AreSame(failureMechanism, hydraulicBoundariesCalculationGroup.FailureMechanism);
 
                 var outputsFolder = (CategoryTreeFolder) children[2];
Index: Ringtoets/WaveImpactAsphaltCover/test/Ringtoets.WaveImpactAsphaltCover.Plugin.Test/TreeNodeInfos/WaveImpactAsphaltCoverWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs
===================================================================
diff -u -r8b60c9e846480f3ffeeb263bfea5d3367bf6bee3 -rb6e6c2d3cc811c3365c0265d1ccd70f2ebac99ed
--- Ringtoets/WaveImpactAsphaltCover/test/Ringtoets.WaveImpactAsphaltCover.Plugin.Test/TreeNodeInfos/WaveImpactAsphaltCoverWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs	(.../WaveImpactAsphaltCoverWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs)	(revision 8b60c9e846480f3ffeeb263bfea5d3367bf6bee3)
+++ Ringtoets/WaveImpactAsphaltCover/test/Ringtoets.WaveImpactAsphaltCover.Plugin.Test/TreeNodeInfos/WaveImpactAsphaltCoverWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs	(.../WaveImpactAsphaltCoverWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs)	(revision b6e6c2d3cc811c3365c0265d1ccd70f2ebac99ed)
@@ -217,6 +217,7 @@
             Assert.AreSame(calculationItem, children[0]);
             var returnedCalculationGroupContext = (WaveImpactAsphaltCoverWaveConditionsCalculationGroupContext) children[1];
             Assert.AreSame(childGroup, returnedCalculationGroupContext.WrappedData);
+            Assert.AreSame(failureMechanism.WaveConditionsCalculationGroup, returnedCalculationGroupContext.Parent);
             Assert.AreSame(failureMechanism, returnedCalculationGroupContext.FailureMechanism);
         }