Index: Ringtoets/HydraRing/test/Ringtoets.HydraRing.Calculation.Test/Calculator/HydraRingCalculatorBaseTest.cs
===================================================================
diff -u -r9b92b0800fb589b1964b6e97e2d82a1765d3e6ad -re42bdf3dd379c46bab9212eb7b30f4754c9bc91c
--- Ringtoets/HydraRing/test/Ringtoets.HydraRing.Calculation.Test/Calculator/HydraRingCalculatorBaseTest.cs	(.../HydraRingCalculatorBaseTest.cs)	(revision 9b92b0800fb589b1964b6e97e2d82a1765d3e6ad)
+++ Ringtoets/HydraRing/test/Ringtoets.HydraRing.Calculation.Test/Calculator/HydraRingCalculatorBaseTest.cs	(.../HydraRingCalculatorBaseTest.cs)	(revision e42bdf3dd379c46bab9212eb7b30f4754c9bc91c)
@@ -39,7 +39,7 @@
             TestDelegate test = () => new TestHydraRingCalculator(null, null);
 
             // Assert
-            var paramName = Assert.Throws<ArgumentNullException>(test).ParamName;
+            string paramName = Assert.Throws<ArgumentNullException>(test).ParamName;
             Assert.AreEqual("hlcdDirectory", paramName);
         }