Index: Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Read/FailureMechanismEntityReadExtensionsTest.cs
===================================================================
diff -u -re749ff5c1ebced7fc8ac52bfc26417f405aee728 -re57e79927485e44d681b0617f17bada42dbfb862
--- Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Read/FailureMechanismEntityReadExtensionsTest.cs	(.../FailureMechanismEntityReadExtensionsTest.cs)	(revision e749ff5c1ebced7fc8ac52bfc26417f405aee728)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Read/FailureMechanismEntityReadExtensionsTest.cs	(.../FailureMechanismEntityReadExtensionsTest.cs)	(revision e57e79927485e44d681b0617f17bada42dbfb862)
@@ -222,11 +222,11 @@
             entity.ReadAsDuneErosionFailureMechanism(failureMechanism, collector);
 
             // Assert
-            ObservableList<DuneLocation> duneLocations = failureMechanism.DuneLocations;
-            Assert.AreEqual(2, duneLocations.Count);
+            IObservableEnumerable<DuneLocation> duneLocations = failureMechanism.DuneLocations;
+            Assert.AreEqual(2, duneLocations.Count());
 
-            Assert.AreEqual(locationAName, duneLocations[0].Name);
-            Assert.AreEqual(locationBName, duneLocations[1].Name);
+            Assert.AreEqual(locationAName, duneLocations.ElementAt(0).Name);
+            Assert.AreEqual(locationBName, duneLocations.ElementAt(1).Name);
         }
 
         #endregion