Index: Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Data.Test/HeightStructuresFailureMechanismTest.cs
===================================================================
diff -u -r46bd119497bde576fd18d0b4f93961f2a7f84c34 -r42c710f0341da1ca4fc911ef8ba502a41073e400
--- Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Data.Test/HeightStructuresFailureMechanismTest.cs	(.../HeightStructuresFailureMechanismTest.cs)	(revision 46bd119497bde576fd18d0b4f93961f2a7f84c34)
+++ Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Data.Test/HeightStructuresFailureMechanismTest.cs	(.../HeightStructuresFailureMechanismTest.cs)	(revision 42c710f0341da1ca4fc911ef8ba502a41073e400)
@@ -57,16 +57,10 @@
         }
 
         [Test]
-        public void AddSection_WithSection_AddedSectionResultAndNotifiesObserver()
+        public void AddSection_WithSection_AddedSectionResult()
         {
             // Setup
-            var mocks = new MockRepository();
-            var observer = mocks.StrictMock<IObserver>();
-            observer.Expect(o => o.UpdateObserver());
-            mocks.ReplayAll();
-
             var failureMechanism = new HeightStructuresFailureMechanism();
-            failureMechanism.SectionResults.Attach(observer);
 
             // Call
             failureMechanism.AddSection(new FailureMechanismSection(string.Empty, new[]
@@ -78,18 +72,12 @@
             Assert.AreEqual(1, failureMechanism.Sections.Count());
             Assert.AreEqual(1, failureMechanism.SectionResults.Count());
             Assert.IsInstanceOf<StructuresFailureMechanismSectionResult<HeightStructuresInput>>(failureMechanism.SectionResults.ElementAt(0));
-            mocks.VerifyAll();
         }
 
         [Test]
-        public void ClearAllSections_WithSectionsAndSectionResults_SectionsAndSectionResultsClearedAndNotifiesObserver()
+        public void ClearAllSections_WithSectionsAndSectionResults_SectionsAndSectionResultsCleared()
         {
             // Setup
-            var mocks = new MockRepository();
-            var observer = mocks.StrictMock<IObserver>();
-            observer.Expect(o => o.UpdateObserver());
-            mocks.ReplayAll();
-
             var failureMechanism = new HeightStructuresFailureMechanism();
 
             failureMechanism.AddSection(new FailureMechanismSection("", new[]
@@ -101,8 +89,6 @@
                 new Point2D(2, 1)
             }));
 
-            failureMechanism.SectionResults.Attach(observer);
-
             // Precondition
             Assert.AreEqual(2, failureMechanism.Sections.Count());
             Assert.AreEqual(2, failureMechanism.SectionResults.Count());
@@ -113,7 +99,6 @@
             // Assert
             Assert.AreEqual(0, failureMechanism.Sections.Count());
             Assert.AreEqual(0, failureMechanism.SectionResults.Count());
-            mocks.VerifyAll();
         }
 
         [Test]