Index: Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Data.Test/ClosingStructuresFailureMechanismTest.cs
===================================================================
diff -u -rb8f08406d6090fac1ef3e711929406cb4cc1110f -rfc8446fc65eb82bb381278d8a94fd061e6278bbe
--- Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Data.Test/ClosingStructuresFailureMechanismTest.cs	(.../ClosingStructuresFailureMechanismTest.cs)	(revision b8f08406d6090fac1ef3e711929406cb4cc1110f)
+++ Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Data.Test/ClosingStructuresFailureMechanismTest.cs	(.../ClosingStructuresFailureMechanismTest.cs)	(revision fc8446fc65eb82bb381278d8a94fd061e6278bbe)
@@ -63,14 +63,15 @@
         {
             // Setup
             var failureMechanism = new ClosingStructuresFailureMechanism();
+            FailureMechanismSection section = FailureMechanismSectionTestFactory.CreateFailureMechanismSection();
 
             // Call
-            failureMechanism.AddSection(FailureMechanismSectionTestFactory.CreateFailureMechanismSection());
+            failureMechanism.AddSection(section);
 
             // Assert
             Assert.AreEqual(1, failureMechanism.Sections.Count());
             Assert.AreEqual(1, failureMechanism.SectionResults.Count());
-            Assert.IsInstanceOf<ClosingStructuresFailureMechanismSectionResult>(failureMechanism.SectionResults.ElementAt(0));
+            Assert.AreSame(section, failureMechanism.SectionResults.First().Section);
         }
 
         [Test]
@@ -96,8 +97,8 @@
             failureMechanism.ClearAllSections();
 
             // Assert
-            Assert.AreEqual(0, failureMechanism.Sections.Count());
-            Assert.AreEqual(0, failureMechanism.SectionResults.Count());
+            CollectionAssert.IsEmpty(failureMechanism.Sections);
+            CollectionAssert.IsEmpty(failureMechanism.SectionResults);
         }
 
         [Test]