Index: Ringtoets/Integration/test/Ringtoets.Integration.IO.Test/Helpers/ExportableFailureMechanismSectionHelperTest.cs
===================================================================
diff -u -r712a8c27a403a3da9bb6441d6ecd8ee53172803c -r16a1f79533ceabeb1b4c6ed00fd7bc1e604dbfa9
--- Ringtoets/Integration/test/Ringtoets.Integration.IO.Test/Helpers/ExportableFailureMechanismSectionHelperTest.cs	(.../ExportableFailureMechanismSectionHelperTest.cs)	(revision 712a8c27a403a3da9bb6441d6ecd8ee53172803c)
+++ Ringtoets/Integration/test/Ringtoets.Integration.IO.Test/Helpers/ExportableFailureMechanismSectionHelperTest.cs	(.../ExportableFailureMechanismSectionHelperTest.cs)	(revision 16a1f79533ceabeb1b4c6ed00fd7bc1e604dbfa9)
@@ -92,5 +92,16 @@
             Assert.AreEqual(20, thirdExportableSection.StartDistance);
             Assert.AreEqual(40, thirdExportableSection.EndDistance);
         }
+
+        [Test]
+        public void GetFailureMechanismSectionGeometry_ReferenceLineNull_ThrowsArgumentNullException()
+        {
+            // Call
+            TestDelegate call = () => ExportableFailureMechanismSectionHelper.GetFailureMechanismSectionGeometry(null, 0, 0);
+
+            // Assert
+            var exception = Assert.Throws<ArgumentNullException>(call);
+            Assert.AreEqual("referenceLine", exception.ParamName);
+        }
     }
 }
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