Index: Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/IFailureMechanismCreateExtensionsTest.cs
===================================================================
diff -u -rb5c11c4e073b7e10365ddbe62f83418ebaba14c4 -rc312034c7478db99d3c2ef96b1c351df806e8d21
--- Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/IFailureMechanismCreateExtensionsTest.cs	(.../IFailureMechanismCreateExtensionsTest.cs)	(revision b5c11c4e073b7e10365ddbe62f83418ebaba14c4)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/IFailureMechanismCreateExtensionsTest.cs	(.../IFailureMechanismCreateExtensionsTest.cs)	(revision c312034c7478db99d3c2ef96b1c351df806e8d21)
@@ -24,6 +24,8 @@
 using Application.Ringtoets.Storage.DbContext;
 using Application.Ringtoets.Storage.TestUtil;
 using NUnit.Framework;
+
+using Ringtoets.Common.Data.FailureMechanism;
 using Ringtoets.Common.Data.TestUtil;
 
 namespace Application.Ringtoets.Storage.Test.Create
@@ -87,5 +89,24 @@
             // Assert
             Assert.AreEqual(1, failureMechanismEntity.FailureMechanismSectionEntities.Count);
         }
+
+        [Test]
+        public void Create_StringPropertiesDoNotShareReference()
+        {
+            // Setup
+            const string original = "ladida";
+            IFailureMechanism failureMechanism = new TestFailureMechanism("a", "cool");
+            failureMechanism.Comments = original;
+
+            var registry = new PersistenceRegistry();
+
+            // Call
+            FailureMechanismEntity entity = failureMechanism.Create(FailureMechanismType.DuneErosion, registry);
+
+            // Assert
+            Assert.AreNotSame(original, entity.Comments,
+                "To create stable binary representations/fingerprints, it's really important that strings are not shared.");
+            Assert.AreEqual(original, entity.Comments);
+        }
     }
 }
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