Index: Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Data.Test/HeightStructuresCalculationTest.cs
===================================================================
diff -u -rb60b7e12cf211bdbe11e0a54734fa097e8ef2146 -r8047e7fd59525ed424105aaefc4ee88b9ae8def6
--- Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Data.Test/HeightStructuresCalculationTest.cs	(.../HeightStructuresCalculationTest.cs)	(revision b60b7e12cf211bdbe11e0a54734fa097e8ef2146)
+++ Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Data.Test/HeightStructuresCalculationTest.cs	(.../HeightStructuresCalculationTest.cs)	(revision 8047e7fd59525ed424105aaefc4ee88b9ae8def6)
@@ -65,7 +65,7 @@
             var generalInput = new GeneralHeightStructuresInput();
             var calculation = new HeightStructuresCalculation(generalInput)
             {
-                Output = new HeightStructuresOutput()
+                Output = new TestHeightStructuresOutput()
             };
 
             // Call
@@ -96,7 +96,7 @@
             var generalInput = new GeneralHeightStructuresInput();
             var calculation = new HeightStructuresCalculation(generalInput)
             {
-                Output = new HeightStructuresOutput()
+                Output = new TestHeightStructuresOutput()
             };
 
             // Call & Assert
@@ -124,7 +124,7 @@
             var generalInput = new GeneralHeightStructuresInput();
             var calculation = new HeightStructuresCalculation(generalInput)
             {
-                Output = new HeightStructuresOutput()
+                Output = new TestHeightStructuresOutput()
             };
 
             // Call
@@ -133,5 +133,10 @@
             // Assert
             Assert.AreSame(calculation.Output, output);
         }
+
+        private class TestHeightStructuresOutput : ProbabilisticOutput
+        {
+            public TestHeightStructuresOutput() : base(0, 0, 0, 0, 0) {}
+        }
     }
 }
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