Index: Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/PersistenceRegistryTest.cs
===================================================================
diff -u -r0c84eb5ded5af71c3982410db8d00ad4fcc572bd -r15b08c6afb3375830f4cfa1bff8150e828d6e66e
--- Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/PersistenceRegistryTest.cs	(.../PersistenceRegistryTest.cs)	(revision 0c84eb5ded5af71c3982410db8d00ad4fcc572bd)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/PersistenceRegistryTest.cs	(.../PersistenceRegistryTest.cs)	(revision 15b08c6afb3375830f4cfa1bff8150e828d6e66e)
@@ -1794,6 +1794,20 @@
         }
 
         [Test]
+        public void Register_WithNullHeightStructureEntity_ThrowsArgumentNullException()
+        {
+            // Setup
+            var registry = new PersistenceRegistry();
+
+            // Call
+            TestDelegate test = () => registry.Register(null, new TestHeightStructure());
+
+            // Assert
+            string paramName = Assert.Throws<ArgumentNullException>(test).ParamName;
+            Assert.AreEqual("entity", paramName);
+        }
+
+        [Test]
         public void Register_WithNullHeightStructure_ThrowsArgumentNullException()
         {
             // Setup
@@ -1808,6 +1822,20 @@
         }
 
         [Test]
+        public void Register_WithNullStabilityPointStructureEntity_ThrowsArgumentNullException()
+        {
+            // Setup
+            var registry = new PersistenceRegistry();
+
+            // Call
+            TestDelegate test = () => registry.Register(null, new TestStabilityPointStructure());
+
+            // Assert
+            string paramName = Assert.Throws<ArgumentNullException>(test).ParamName;
+            Assert.AreEqual("entity", paramName);
+        }
+
+        [Test]
         public void Register_WithNullStabilityPointStructure_ThrowsArgumentNullException()
         {
             // Setup
@@ -1822,6 +1850,20 @@
         }
 
         [Test]
+        public void Register_WithNullHeightStructuresCalculationEntity_ThrowsArgumentNullException()
+        {
+            // Setup
+            var registry = new PersistenceRegistry();
+
+            // Call
+            TestDelegate test = () => registry.Register(null, new TestHeightStructuresCalculation());
+
+            // Assert
+            string paramName = Assert.Throws<ArgumentNullException>(test).ParamName;
+            Assert.AreEqual("entity", paramName);
+        }
+
+        [Test]
         public void Register_WithNullHeightStructuresCalculation_ThrowsArgumentNullException()
         {
             // Setup