Index: Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Data.Test/ClosingStructuresFailureMechanismTest.cs
===================================================================
diff -u -r67d6a305cec6967c1247f3d9cba8a817499d2a1d -rb6a9219d1e628e4430ccf880e8ea390cec04fc04
--- Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Data.Test/ClosingStructuresFailureMechanismTest.cs	(.../ClosingStructuresFailureMechanismTest.cs)	(revision 67d6a305cec6967c1247f3d9cba8a817499d2a1d)
+++ Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Data.Test/ClosingStructuresFailureMechanismTest.cs	(.../ClosingStructuresFailureMechanismTest.cs)	(revision b6a9219d1e628e4430ccf880e8ea390cec04fc04)
@@ -22,6 +22,8 @@
 using System.Linq;
 using Core.Common.Base.Geometry;
 using NUnit.Framework;
+using Rhino.Mocks;
+using Ringtoets.Common.Data.Calculation;
 using Ringtoets.Common.Data.FailureMechanism;
 
 namespace Ringtoets.ClosingStructures.Data.Test
@@ -97,5 +99,35 @@
             Assert.AreEqual(0, failureMechanism.Sections.Count());
             Assert.AreEqual(0, failureMechanism.SectionResults.Count());
         }
+
+        [Test]
+        public void Calculations_MultipleChildrenAdded_ReturnClosingStructuresCalculations()
+        {
+            // Setup
+            var mocks = new MockRepository();
+            var failureMechanism = new ClosingStructuresFailureMechanism
+            {
+                CalculationsGroup =
+                {
+                    Children =
+                    {
+                        new CalculationGroup(),
+                        new ClosingStructuresCalculation(),
+                        mocks.StrictMock<ICalculation>(),
+                        new ClosingStructuresCalculation()
+                    }
+                }
+            };
+
+            mocks.ReplayAll();
+
+            // Call
+            var calculations = failureMechanism.Calculations.ToList();
+
+            // Assert
+            Assert.AreEqual(2, calculations.Count);
+            Assert.IsTrue(calculations.All(c => c is ClosingStructuresCalculation));
+            mocks.VerifyAll();
+        }
     }
 }
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