Index: Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/CalculationGroupCreateExtensionsTest.cs
===================================================================
diff -u -r06e4debe3f4a9bdfb38c40b8c00ed013e8f7bb98 -rc312034c7478db99d3c2ef96b1c351df806e8d21
--- Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/CalculationGroupCreateExtensionsTest.cs	(.../CalculationGroupCreateExtensionsTest.cs)	(revision 06e4debe3f4a9bdfb38c40b8c00ed013e8f7bb98)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/CalculationGroupCreateExtensionsTest.cs	(.../CalculationGroupCreateExtensionsTest.cs)	(revision c312034c7478db99d3c2ef96b1c351df806e8d21)
@@ -75,6 +75,27 @@
         }
 
         [Test]
+        public void Create_StringPropertiesDoNotShareReference()
+        {
+            // Setup
+            const string name = "original";
+            var group = new CalculationGroup
+            {
+                Name = name
+            };
+
+            var registry = new PersistenceRegistry();
+
+            // Call
+            CalculationGroupEntity entity = group.Create(registry, 0);
+
+            // Assert
+            Assert.AreNotSame(name, entity.Name,
+                "To create stable binary representations/fingerprints, it's really important that strings are not shared.");
+            Assert.AreEqual(name, entity.Name);
+        }
+
+        [Test]
         public void Create_GroupWithChildren_CreateEntities()
         {
             // Setup