Index: Ringtoets/Common/test/Ringtoets.Common.Forms.TestUtil.Test/MapDataTestHelperTest.cs
===================================================================
diff -u -rb7bfa326e697eed7d8c203b678f20dfc55e1c7ff -r86b6ce2b77450d63016858e8e18796c02bdaad52
--- Ringtoets/Common/test/Ringtoets.Common.Forms.TestUtil.Test/MapDataTestHelperTest.cs	(.../MapDataTestHelperTest.cs)	(revision b7bfa326e697eed7d8c203b678f20dfc55e1c7ff)
+++ Ringtoets/Common/test/Ringtoets.Common.Forms.TestUtil.Test/MapDataTestHelperTest.cs	(.../MapDataTestHelperTest.cs)	(revision 86b6ce2b77450d63016858e8e18796c02bdaad52)
@@ -196,7 +196,7 @@
             var mapData = new MapLineData("test");
 
             // Call
-            TestDelegate test = () => MapDataTestHelper.AssertHydraulicBoundaryLocationsMapData(null, mapData);
+            TestDelegate test = () => MapDataTestHelper.AssertHydraulicBoundaryLocationsMapData(Enumerable.Empty<HydraulicBoundaryLocation>(), mapData);
 
             // Assert
             Assert.Throws<AssertionException>(test);