Index: Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Plugin.Test/TreeNodeInfos/HeightStructureTreeNodeInfoTest.cs
===================================================================
diff -u -re46bec50706f5ea1a7754bbaebfc892745d8604a -rfada97a57c5c19983ffe23b02944dc48d02c509c
--- Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Plugin.Test/TreeNodeInfos/HeightStructureTreeNodeInfoTest.cs	(.../HeightStructureTreeNodeInfoTest.cs)	(revision e46bec50706f5ea1a7754bbaebfc892745d8604a)
+++ Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Plugin.Test/TreeNodeInfos/HeightStructureTreeNodeInfoTest.cs	(.../HeightStructureTreeNodeInfoTest.cs)	(revision fada97a57c5c19983ffe23b02944dc48d02c509c)
@@ -230,7 +230,7 @@
             info.OnNodeRemoved(nodeData, parentData);
 
             // Assert
-            CollectionAssert.DoesNotContain(failureMechanism.HeightStructures, nodeData);
+            CollectionAssert.DoesNotContain(failureMechanism.HeightStructuresCollection, nodeData);
 
             Assert.IsNull(calculation1.InputParameters.Structure);
             Assert.IsNotNull(calculation2.InputParameters.Structure);