Index: Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Service/ClosingStructuresCalculationActivity.cs
===================================================================
diff -u -ra494bde768f1b989d31bff6a801a1816d6f9692e -r4c9281162ddc3a03e3e658addfad69f4b8f9762f
--- Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Service/ClosingStructuresCalculationActivity.cs	(.../ClosingStructuresCalculationActivity.cs)	(revision a494bde768f1b989d31bff6a801a1816d6f9692e)
+++ Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Service/ClosingStructuresCalculationActivity.cs	(.../ClosingStructuresCalculationActivity.cs)	(revision 4c9281162ddc3a03e3e658addfad69f4b8f9762f)
@@ -32,7 +32,7 @@
     /// <summary>
     /// <see cref="CalculatableActivity"/> for running a structures closure calculation.
     /// </summary>
-    public class ClosingStructuresCalculationActivity : CalculatableActivity
+    internal class ClosingStructuresCalculationActivity : CalculatableActivity
     {
         private readonly StructuresCalculation<ClosingStructuresInput> calculation;
         private readonly ClosingStructuresCalculationService calculationService;