Index: Ringtoets/Common/test/Ringtoets.Common.Data.Test/Hydraulics/HydraulicBoundaryDatabaseTest.cs
===================================================================
diff -u -r0bba8a0a6f5f4acd4d90aa43e977c7a5d434c418 -r65f56fc3ba9753004e873085dfae42575f91bc01
--- Ringtoets/Common/test/Ringtoets.Common.Data.Test/Hydraulics/HydraulicBoundaryDatabaseTest.cs	(.../HydraulicBoundaryDatabaseTest.cs)	(revision 0bba8a0a6f5f4acd4d90aa43e977c7a5d434c418)
+++ Ringtoets/Common/test/Ringtoets.Common.Data.Test/Hydraulics/HydraulicBoundaryDatabaseTest.cs	(.../HydraulicBoundaryDatabaseTest.cs)	(revision 65f56fc3ba9753004e873085dfae42575f91bc01)
@@ -155,7 +155,7 @@
             Assert.AreEqual(version, hydraulicBoundaryDatabase.Version);
             Assert.IsFalse(hydraulicBoundaryDatabase.CanUsePreprocessor);
             Assert.IsFalse(hydraulicBoundaryDatabase.UsePreprocessor);
-            Assert.IsEmpty(hydraulicBoundaryDatabase.PreprocessorDirectory);
+            Assert.IsNull(hydraulicBoundaryDatabase.PreprocessorDirectory);
         }
 
         [Test]
@@ -182,7 +182,7 @@
             Assert.AreEqual(version, hydraulicBoundaryDatabase.Version);
             Assert.IsFalse(hydraulicBoundaryDatabase.CanUsePreprocessor);
             Assert.IsFalse(hydraulicBoundaryDatabase.UsePreprocessor);
-            Assert.IsEmpty(hydraulicBoundaryDatabase.PreprocessorDirectory);
+            Assert.IsNull(hydraulicBoundaryDatabase.PreprocessorDirectory);
         }
 
         [Test]