Index: Ringtoets/HydraRing/test/Ringtoets.HydraRing.IO.Test/HydraulicBoundaryLocationsWriterTest.cs
===================================================================
diff -u -r3d27194c4194dd405ab3471818957a64a59a0f19 -rce190360da30edf73fb464cc0fea1d9a795aa5d4
--- Ringtoets/HydraRing/test/Ringtoets.HydraRing.IO.Test/HydraulicBoundaryLocationsWriterTest.cs	(.../HydraulicBoundaryLocationsWriterTest.cs)	(revision 3d27194c4194dd405ab3471818957a64a59a0f19)
+++ Ringtoets/HydraRing/test/Ringtoets.HydraRing.IO.Test/HydraulicBoundaryLocationsWriterTest.cs	(.../HydraulicBoundaryLocationsWriterTest.cs)	(revision ce190360da30edf73fb464cc0fea1d9a795aa5d4)
@@ -78,7 +78,7 @@
             var writer = new HydraulicBoundaryLocationsWriter("aName", "bName");
 
             // Call
-            TestDelegate call = () => writer.WriteHydraulicBoundaryLocations(Enumerable.Empty<IHydraulicBoundaryLocation>(), null);
+            TestDelegate call = () => writer.WriteHydraulicBoundaryLocations(Enumerable.Empty<HydraulicBoundaryLocation>(), null);
 
             // Assert
             Assert.Throws<ArgumentNullException>(call);