Index: Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Plugin.Test/TreeNodeInfos/ClosingStructuresCalculationGroupContextTreeNodeInfoTest.cs
===================================================================
diff -u -rf8c28b3b04cdabb62ea37772efcb1f4ebbbf2b9e -r4ba98c21e6463be2dc07c1f5e57f5de56590a48e
--- Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Plugin.Test/TreeNodeInfos/ClosingStructuresCalculationGroupContextTreeNodeInfoTest.cs	(.../ClosingStructuresCalculationGroupContextTreeNodeInfoTest.cs)	(revision f8c28b3b04cdabb62ea37772efcb1f4ebbbf2b9e)
+++ Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Plugin.Test/TreeNodeInfos/ClosingStructuresCalculationGroupContextTreeNodeInfoTest.cs	(.../ClosingStructuresCalculationGroupContextTreeNodeInfoTest.cs)	(revision 4ba98c21e6463be2dc07c1f5e57f5de56590a48e)
@@ -321,12 +321,14 @@
                 new TestClosingStructure()
             }, "some path");
             var assessmentSection = mocks.Stub<IAssessmentSection>();
-            assessmentSection.HydraulicBoundaryDatabase = new HydraulicBoundaryDatabase();
             var groupContext = new ClosingStructuresCalculationGroupContext(group,
                                                                             null,
                                                                             failureMechanism,
                                                                             assessmentSection);
             var menuBuilder = new CustomItemsOnlyContextMenuBuilder();
+
+            assessmentSection.Stub(a => a.HydraulicBoundaryDatabase).Return(new HydraulicBoundaryDatabase());
+
             using (var treeViewControl = new TreeViewControl())
             {
                 gui.Stub(g => g.Get(groupContext, treeViewControl)).Return(menuBuilder);
@@ -540,7 +542,7 @@
             failureMechanism.CalculationsGroup.Children.Add(new StructuresCalculation<ClosingStructuresInput>());
 
             var assessmentSection = mocks.Stub<IAssessmentSection>();
-            assessmentSection.HydraulicBoundaryDatabase = new HydraulicBoundaryDatabase();
+            assessmentSection.Stub(a => a.HydraulicBoundaryDatabase).Return(new HydraulicBoundaryDatabase());
 
             var nodeData = new ClosingStructuresCalculationGroupContext(group,
                                                                         null,