Index: Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Plugin.Test/ImportInfos/HeightStructuresContextImportInfoTest.cs
===================================================================
diff -u -r2a81f01756e227d5ce93717b21b87e8a5cd5fcbb -rd942c0a3949acb6400597d20243788a5bf6c66b5
--- Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Plugin.Test/ImportInfos/HeightStructuresContextImportInfoTest.cs	(.../HeightStructuresContextImportInfoTest.cs)	(revision 2a81f01756e227d5ce93717b21b87e8a5cd5fcbb)
+++ Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Plugin.Test/ImportInfos/HeightStructuresContextImportInfoTest.cs	(.../HeightStructuresContextImportInfoTest.cs)	(revision d942c0a3949acb6400597d20243788a5bf6c66b5)
@@ -51,10 +51,9 @@
             // Setup
             var mocks = new MockRepository();
             var assessmentSection = mocks.Stub<IAssessmentSection>();
+            assessmentSection.Stub(a => a.ReferenceLine).Return(new ReferenceLine());
             mocks.ReplayAll();
 
-            assessmentSection.ReferenceLine = new ReferenceLine();
-
             var failureMechanism = new HeightStructuresFailureMechanism();
             var importTarget = new HeightStructuresContext(failureMechanism.HeightStructures,
                                                            failureMechanism, assessmentSection);
@@ -143,7 +142,7 @@
             // Setup
             var mocks = new MockRepository();
             var assessmentSection = mocks.Stub<IAssessmentSection>();
-            assessmentSection.ReferenceLine = new ReferenceLine();
+            assessmentSection.Stub(a => a.ReferenceLine).Return(new ReferenceLine());
             mocks.ReplayAll();
 
             var failureMechanism = new HeightStructuresFailureMechanism();
@@ -171,7 +170,7 @@
             // Setup
             var mocks = new MockRepository();
             var assessmentSection = mocks.Stub<IAssessmentSection>();
-            assessmentSection.ReferenceLine = null;
+            assessmentSection.Stub(a => a.ReferenceLine).Return(new ReferenceLine());
             mocks.ReplayAll();
 
             var failureMechanism = new HeightStructuresFailureMechanism();
Index: Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Plugin.Test/UpdateInfos/HeightStructuresContextUpdateInfoTest.cs
===================================================================
diff -u -r2a81f01756e227d5ce93717b21b87e8a5cd5fcbb -rd942c0a3949acb6400597d20243788a5bf6c66b5
--- Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Plugin.Test/UpdateInfos/HeightStructuresContextUpdateInfoTest.cs	(.../HeightStructuresContextUpdateInfoTest.cs)	(revision 2a81f01756e227d5ce93717b21b87e8a5cd5fcbb)
+++ Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Plugin.Test/UpdateInfos/HeightStructuresContextUpdateInfoTest.cs	(.../HeightStructuresContextUpdateInfoTest.cs)	(revision d942c0a3949acb6400597d20243788a5bf6c66b5)
@@ -249,10 +249,9 @@
             // Setup
             var mocks = new MockRepository();
             var assessmentSection = mocks.Stub<IAssessmentSection>();
+            assessmentSection.Stub(a => a.ReferenceLine).Return(new ReferenceLine());
             mocks.ReplayAll();
 
-            assessmentSection.ReferenceLine = new ReferenceLine();
-
             var failureMechanism = new HeightStructuresFailureMechanism();
             var structures = new StructureCollection<HeightStructure>();
 
Index: Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Plugin.Test/UpdateInfos/HeightStructuresFailureMechanismSectionsContextUpdateInfoTest.cs
===================================================================
diff -u -r2a81f01756e227d5ce93717b21b87e8a5cd5fcbb -rd942c0a3949acb6400597d20243788a5bf6c66b5
--- Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Plugin.Test/UpdateInfos/HeightStructuresFailureMechanismSectionsContextUpdateInfoTest.cs	(.../HeightStructuresFailureMechanismSectionsContextUpdateInfoTest.cs)	(revision 2a81f01756e227d5ce93717b21b87e8a5cd5fcbb)
+++ Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Plugin.Test/UpdateInfos/HeightStructuresFailureMechanismSectionsContextUpdateInfoTest.cs	(.../HeightStructuresFailureMechanismSectionsContextUpdateInfoTest.cs)	(revision d942c0a3949acb6400597d20243788a5bf6c66b5)
@@ -162,7 +162,7 @@
             // Setup
             var mocks = new MockRepository();
             var assessmentSection = mocks.Stub<IAssessmentSection>();
-            assessmentSection.ReferenceLine = new ReferenceLine();
+            assessmentSection.Stub(a => a.ReferenceLine).Return(new ReferenceLine());
             mocks.ReplayAll();
 
             var failureMechanism = new HeightStructuresFailureMechanism();