Index: Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Data.Test/ClosingStructuresFailureMechanismTest.cs
===================================================================
diff -u -rcd7467ba87da02a6146cd5cedb8414c352cac862 -r4b9148359793969630d803f2477e765fba4e206f
--- Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Data.Test/ClosingStructuresFailureMechanismTest.cs	(.../ClosingStructuresFailureMechanismTest.cs)	(revision cd7467ba87da02a6146cd5cedb8414c352cac862)
+++ Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Data.Test/ClosingStructuresFailureMechanismTest.cs	(.../ClosingStructuresFailureMechanismTest.cs)	(revision 4b9148359793969630d803f2477e765fba4e206f)
@@ -60,14 +60,17 @@
         }
 
         [Test]
-        public void AddSection_WithSection_AddedSectionResult()
+        public void SetSections_WithSection_SetsSectionResults()
         {
             // Setup
             var failureMechanism = new ClosingStructuresFailureMechanism();
             FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
 
             // Call
-            failureMechanism.AddSection(section);
+            FailureMechanismTestHelper.SetSections(failureMechanism, new[]
+            {
+                section
+            });
 
             // Assert
             Assert.AreEqual(1, failureMechanism.Sections.Count());
@@ -76,29 +79,30 @@
         }
 
         [Test]
-        public void ClearAllSections_WithSectionsAndSectionResults_SectionsAndSectionResultsCleared()
+        public void ClearAllSections_WithSectionResults_SectionResultsCleared()
         {
             // Setup
             var failureMechanism = new ClosingStructuresFailureMechanism();
 
-            failureMechanism.AddSection(FailureMechanismSectionTestFactory.CreateFailureMechanismSection(new[]
+            FailureMechanismTestHelper.SetSections(failureMechanism, new[]
             {
-                new Point2D(2, 1)
-            }));
-            failureMechanism.AddSection(FailureMechanismSectionTestFactory.CreateFailureMechanismSection(new[]
-            {
-                new Point2D(2, 1)
-            }));
+                FailureMechanismSectionTestFactory.CreateFailureMechanismSection(new[]
+                {
+                    new Point2D(2, 1)
+                }),
+                FailureMechanismSectionTestFactory.CreateFailureMechanismSection(new[]
+                {
+                    new Point2D(2, 1)
+                })
+            });
 
             // Precondition
-            Assert.AreEqual(2, failureMechanism.Sections.Count());
             Assert.AreEqual(2, failureMechanism.SectionResults.Count());
 
             // Call
             failureMechanism.ClearAllSections();
 
             // Assert
-            CollectionAssert.IsEmpty(failureMechanism.Sections);
             CollectionAssert.IsEmpty(failureMechanism.SectionResults);
         }