Index: Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/RingtoetsPipingSurfaceLineCollectionTest.cs
===================================================================
diff -u -r66b07e7599319ea71ff109d8303f74a4a2e5f71c -rc290911dd4647e3115e239c8baf814717c098a5a
--- Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/RingtoetsPipingSurfaceLineCollectionTest.cs	(.../RingtoetsPipingSurfaceLineCollectionTest.cs)	(revision 66b07e7599319ea71ff109d8303f74a4a2e5f71c)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/RingtoetsPipingSurfaceLineCollectionTest.cs	(.../RingtoetsPipingSurfaceLineCollectionTest.cs)	(revision c290911dd4647e3115e239c8baf814717c098a5a)
@@ -37,7 +37,7 @@
             var collection = new RingtoetsPipingSurfaceLineCollection();
 
             // Assert
-            Assert.IsInstanceOf<ObservableUniqueItemCollectionWithSourcePath<RingtoetsPipingSurfaceLine>>(collection);
+            Assert.IsInstanceOf<ObservableUniqueItemCollectionWithSourcePath<RingtoetsPipingSurfaceLine, string>>(collection);
         }
 
         [Test]