Index: Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Service.Test/HeightStructuresDataSynchronizationServiceTest.cs
===================================================================
diff -u -r1051f838aebbd5977351542027ce6330583b0d43 -rd9e5e7ea1e028347a738fc8e3d9c158a9b53ce15
--- Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Service.Test/HeightStructuresDataSynchronizationServiceTest.cs	(.../HeightStructuresDataSynchronizationServiceTest.cs)	(revision 1051f838aebbd5977351542027ce6330583b0d43)
+++ Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Service.Test/HeightStructuresDataSynchronizationServiceTest.cs	(.../HeightStructuresDataSynchronizationServiceTest.cs)	(revision d9e5e7ea1e028347a738fc8e3d9c158a9b53ce15)
@@ -20,6 +20,7 @@
 // All rights reserved.
 
 using System;
+using System.Collections.Generic;
 using System.Linq;
 using NUnit.Framework;
 using Ringtoets.Common.Data.Probability;
@@ -46,17 +47,21 @@
                 Output = new ProbabilityAssessmentOutput(0, 0, 0, 0, 0)
             };
 
+            HeightStructuresCalculation calculation3 = new HeightStructuresCalculation();
+
             failureMechanism.CalculationsGroup.Children.Add(calculation1);
             failureMechanism.CalculationsGroup.Children.Add(calculation2);
+            failureMechanism.CalculationsGroup.Children.Add(calculation3);
 
             // Call
-            HeightStructuresDataSynchronizationService.ClearAllCalculationOutput(failureMechanism);
+            IEnumerable<HeightStructuresCalculation> affectedItems = HeightStructuresDataSynchronizationService.ClearAllCalculationOutput(failureMechanism);
 
             // Assert
             foreach (HeightStructuresCalculation calculation in failureMechanism.CalculationsGroup.Children.Cast<HeightStructuresCalculation>())
             {
                 Assert.IsNull(calculation.Output);
             }
+            CollectionAssert.AreEqual(new[] { calculation1, calculation2 }, affectedItems);
         }
 
         [Test]
@@ -87,7 +92,7 @@
         }
 
         [Test]
-        public void ClearHydraulicBoundaryLocations_WithHydraulicBoundaryLocation_ClearsHydraulicBoundaryLocation()
+        public void ClearHydraulicBoundaryLocations_WithHydraulicBoundaryLocation_ClearsHydraulicBoundaryLocationAndReturnsAffectedCalculations()
         {
             // Setup
             HeightStructuresFailureMechanism failureMechanism = new HeightStructuresFailureMechanism();
@@ -109,17 +114,25 @@
                 }
             };
 
+            HeightStructuresCalculation calculation3 = new HeightStructuresCalculation();
+
             failureMechanism.CalculationsGroup.Children.Add(calculation1);
             failureMechanism.CalculationsGroup.Children.Add(calculation2);
+            failureMechanism.CalculationsGroup.Children.Add(calculation3);
 
             // Call
-            HeightStructuresDataSynchronizationService.ClearHydraulicBoundaryLocations(failureMechanism);
+            IEnumerable<HeightStructuresCalculation> affectedItems = HeightStructuresDataSynchronizationService.ClearHydraulicBoundaryLocations(failureMechanism);
 
             // Assert
             foreach (HeightStructuresCalculation calculation in failureMechanism.CalculationsGroup.Children.Cast<HeightStructuresCalculation>())
             {
                 Assert.IsNull(calculation.InputParameters.HydraulicBoundaryLocation);
             }
+            CollectionAssert.AreEqual(new[]
+            {
+                calculation1,
+                calculation2
+            }, affectedItems);
         }
     }
 }
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