Index: Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Service.Test/ClosingStructuresCalculationActivityTest.cs
===================================================================
diff -u -rf7a5d22408a43c70b20a9eb5ee79cb336bacdf9e -r57cf41dc262bf62fdf1dddc550884a2f79163d4e
--- Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Service.Test/ClosingStructuresCalculationActivityTest.cs	(.../ClosingStructuresCalculationActivityTest.cs)	(revision f7a5d22408a43c70b20a9eb5ee79cb336bacdf9e)
+++ Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Service.Test/ClosingStructuresCalculationActivityTest.cs	(.../ClosingStructuresCalculationActivityTest.cs)	(revision 57cf41dc262bf62fdf1dddc550884a2f79163d4e)
@@ -48,7 +48,7 @@
             var activity = new ClosingStructuresCalculationActivity(calculation, "", failureMechanism, assessmentSection);
 
             // Assert
-            Assert.IsInstanceOf<HydraRingActivityBase>(activity);
+            Assert.IsInstanceOf<CalculatableActivity>(activity);
             Assert.AreEqual($"Uitvoeren van berekening '{calculation.Name}'", activity.Description);
             Assert.IsNull(activity.ProgressText);
             Assert.AreEqual(ActivityState.None, activity.State);