Index: Ringtoets/Piping/test/Ringtoets.Piping.Plugin.Test/TreeNodeInfos/PipingCalculationGroupContextTreeNodeInfoTest.cs
===================================================================
diff -u -re20dbeea13952a2efba3e9357ead39687e6be8b9 -rb3345281c7e78a005873e216f5c703ba3558f29b
--- Ringtoets/Piping/test/Ringtoets.Piping.Plugin.Test/TreeNodeInfos/PipingCalculationGroupContextTreeNodeInfoTest.cs	(.../PipingCalculationGroupContextTreeNodeInfoTest.cs)	(revision e20dbeea13952a2efba3e9357ead39687e6be8b9)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Plugin.Test/TreeNodeInfos/PipingCalculationGroupContextTreeNodeInfoTest.cs	(.../PipingCalculationGroupContextTreeNodeInfoTest.cs)	(revision b3345281c7e78a005873e216f5c703ba3558f29b)
@@ -189,13 +189,7 @@
             });
 
             var pipingFailureMechanism = new TestPipingFailureMechanism();
-            pipingFailureMechanism.AddSection(new FailureMechanismSection("A", new[]
-            {
-                new Point2D(0, 0)
-            }));
-
             var assessmentSectionMock = mocks.StrictMock<IAssessmentSection>();
-
             var nodeData = new PipingCalculationGroupContext(group,
                                                              Enumerable.Empty<RingtoetsPipingSurfaceLine>(),
                                                              Enumerable.Empty<StochasticSoilModel>(),
@@ -304,12 +298,7 @@
             });
 
             var pipingFailureMechanism = new TestPipingFailureMechanism();
-            pipingFailureMechanism.AddSection(new FailureMechanismSection("A", new[]
-            {
-                new Point2D(0, 0)
-            }));
             var assessmentSectionMock = mocks.StrictMock<IAssessmentSection>();
-
             var nodeData = new PipingCalculationGroupContext(group,
                                                              Enumerable.Empty<RingtoetsPipingSurfaceLine>(),
                                                              Enumerable.Empty<StochasticSoilModel>(),
@@ -826,14 +815,8 @@
                 group.Children.Add(invalidCalculation);
 
                 var pipingFailureMechanism = new TestPipingFailureMechanism();
-                pipingFailureMechanism.AddSection(new FailureMechanismSection("A", new[]
-                {
-                    new Point2D(0, 0)
-                }));
-
                 IAssessmentSection assessmentSectionStub = AssessmentSectionHelper.CreateAssessmentSectionStubWithoutBoundaryDatabase(
                     pipingFailureMechanism, mocks);
-
                 var nodeData = new PipingCalculationGroupContext(group,
                                                                  Enumerable.Empty<RingtoetsPipingSurfaceLine>(),
                                                                  Enumerable.Empty<StochasticSoilModel>(),
Index: Ringtoets/Piping/test/Ringtoets.Piping.Plugin.Test/TreeNodeInfos/PipingCalculationScenarioContextTreeNodeInfoTest.cs
===================================================================
diff -u -rf0787b7d6179789f8d05cfbd362ab98679087569 -rb3345281c7e78a005873e216f5c703ba3558f29b
--- Ringtoets/Piping/test/Ringtoets.Piping.Plugin.Test/TreeNodeInfos/PipingCalculationScenarioContextTreeNodeInfoTest.cs	(.../PipingCalculationScenarioContextTreeNodeInfoTest.cs)	(revision f0787b7d6179789f8d05cfbd362ab98679087569)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Plugin.Test/TreeNodeInfos/PipingCalculationScenarioContextTreeNodeInfoTest.cs	(.../PipingCalculationScenarioContextTreeNodeInfoTest.cs)	(revision b3345281c7e78a005873e216f5c703ba3558f29b)
@@ -192,12 +192,7 @@
             {
                 var calculation = new PipingCalculationScenario(new GeneralPipingInput());
                 var pipingFailureMechanism = new TestPipingFailureMechanism();
-                pipingFailureMechanism.AddSection(new FailureMechanismSection("A", new[]
-                {
-                    new Point2D(0, 0)
-                }));
                 var assessmentSectionMock = mocks.StrictMock<IAssessmentSection>();
-
                 var nodeData = new PipingCalculationScenarioContext(calculation,
                                                                     Enumerable.Empty<RingtoetsPipingSurfaceLine>(),
                                                                     Enumerable.Empty<StochasticSoilModel>(),
@@ -237,12 +232,7 @@
                     SemiProbabilisticOutput = new TestPipingSemiProbabilisticOutput()
                 };
                 var pipingFailureMechanism = new TestPipingFailureMechanism();
-                pipingFailureMechanism.AddSection(new FailureMechanismSection("A", new[]
-                {
-                    new Point2D(0, 0)
-                }));
                 var assessmentSectionMock = mocks.StrictMock<IAssessmentSection>();
-
                 var nodeData = new PipingCalculationScenarioContext(calculation,
                                                                     Enumerable.Empty<RingtoetsPipingSurfaceLine>(),
                                                                     Enumerable.Empty<StochasticSoilModel>(),
@@ -277,12 +267,7 @@
             {
                 var calculation = new PipingCalculationScenario(new GeneralPipingInput());
                 var pipingFailureMechanism = new PipingFailureMechanism();
-                pipingFailureMechanism.AddSection(new FailureMechanismSection("A", new[]
-                {
-                    new Point2D(0, 0)
-                }));
                 var assessmentSectionMock = mocks.StrictMock<IAssessmentSection>();
-
                 var nodeData = new PipingCalculationScenarioContext(calculation,
                                                                     Enumerable.Empty<RingtoetsPipingSurfaceLine>(),
                                                                     Enumerable.Empty<StochasticSoilModel>(),
@@ -325,12 +310,7 @@
             {
                 var calculation = new PipingCalculationScenario(new GeneralPipingInput());
                 var pipingFailureMechanism = new TestPipingFailureMechanism();
-                pipingFailureMechanism.AddSection(new FailureMechanismSection("A", new[]
-                {
-                    new Point2D(0, 0)
-                }));
                 var assessmentSectionMock = mocks.StrictMock<IAssessmentSection>();
-
                 var nodeData = new PipingCalculationScenarioContext(calculation,
                                                                     Enumerable.Empty<RingtoetsPipingSurfaceLine>(),
                                                                     Enumerable.Empty<StochasticSoilModel>(),
Index: Ringtoets/Piping/test/Ringtoets.Piping.Plugin.Test/TreeNodeInfos/PipingFailureMechanismContextTreeNodeInfoTest.cs
===================================================================
diff -u -r56eeb5bf4519319c96065c68b4454f9f8fa25f5e -rb3345281c7e78a005873e216f5c703ba3558f29b
--- Ringtoets/Piping/test/Ringtoets.Piping.Plugin.Test/TreeNodeInfos/PipingFailureMechanismContextTreeNodeInfoTest.cs	(.../PipingFailureMechanismContextTreeNodeInfoTest.cs)	(revision 56eeb5bf4519319c96065c68b4454f9f8fa25f5e)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Plugin.Test/TreeNodeInfos/PipingFailureMechanismContextTreeNodeInfoTest.cs	(.../PipingFailureMechanismContextTreeNodeInfoTest.cs)	(revision b3345281c7e78a005873e216f5c703ba3558f29b)
@@ -261,7 +261,6 @@
 
                 plugin.Gui = gui;
 
-                failureMechanism.CalculationsGroup.Children.Clear();
                 failureMechanism.CalculationsGroup.Children.Add(pipingCalculation1);
                 failureMechanism.CalculationsGroup.Children.Add(pipingCalculation2);
                 failureMechanism.CalculationsGroup.Children.ElementAt(0).Attach(observer);
@@ -307,10 +306,6 @@
         {
             // Setup
             var failureMechanism = new TestPipingFailureMechanism();
-            failureMechanism.AddSection(new FailureMechanismSection("test", new[]
-            {
-                new Point2D(0, 0)
-            }));
             var pipingCalculation = new PipingCalculationScenario(failureMechanism.GeneralInput)
             {
                 Output = new TestPipingOutput(),
@@ -624,8 +619,6 @@
             using (var treeViewControl = new TreeViewControl())
             {
                 var failureMechanism = new TestPipingFailureMechanism();
-                failureMechanism.CalculationsGroup.Children.Clear();
-
                 PipingCalculationScenario validCalculation = PipingCalculationScenarioFactory.CreatePipingCalculationScenarioWithValidInput();
                 validCalculation.Name = "A";
                 PipingCalculationScenario invalidCalculation = PipingCalculationScenarioFactory.CreatePipingCalculationScenarioWithInvalidInput();
@@ -672,12 +665,6 @@
             using (var treeViewControl = new TreeViewControl())
             {
                 var failureMechanism = new TestPipingFailureMechanism();
-                failureMechanism.AddSection(new FailureMechanismSection("test", new[]
-                {
-                    new Point2D(0, 0)
-                }));
-                failureMechanism.CalculationsGroup.Children.Clear();
-
                 PipingCalculationScenario validCalculation = PipingCalculationScenarioFactory.CreatePipingCalculationScenarioWithValidInput();
                 validCalculation.Name = "A";
                 PipingCalculationScenario invalidCalculation = PipingCalculationScenarioFactory.CreatePipingCalculationScenarioWithInvalidInput();