Index: Ringtoets/Integration/test/Ringtoets.Integration.Data.Test/AssessmentSectionTest.cs
===================================================================
diff -u -rf432893149ee8f4e74d4c21f082974fb89916150 -rca0345432ea951a80e3e956a8d485840c0897e1d
--- Ringtoets/Integration/test/Ringtoets.Integration.Data.Test/AssessmentSectionTest.cs	(.../AssessmentSectionTest.cs)	(revision f432893149ee8f4e74d4c21f082974fb89916150)
+++ Ringtoets/Integration/test/Ringtoets.Integration.Data.Test/AssessmentSectionTest.cs	(.../AssessmentSectionTest.cs)	(revision ca0345432ea951a80e3e956a8d485840c0897e1d)
@@ -21,6 +21,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.ComponentModel;
 using System.Linq;
 using Core.Common.Base;
 using Core.Common.Base.Geometry;
@@ -153,6 +154,21 @@
         }
 
         [Test]
+        public void Constructor_InvalidAssessmentSectionComposition_ThrowsInvalidEnumArgumentException()
+        {
+            // Setup
+            const int invalidValue = 99;
+
+            // Call
+            TestDelegate call = () => new AssessmentSection((AssessmentSectionComposition) invalidValue);
+
+            // Assert
+            string expectedMessage = $"The value of argument 'newComposition' ({invalidValue}) is invalid for Enum type '{nameof(AssessmentSectionComposition)}'.";
+            string parameterName = TestHelper.AssertThrowsArgumentExceptionAndTestMessage<InvalidEnumArgumentException>(call, expectedMessage).ParamName;
+            Assert.AreEqual("newComposition", parameterName);
+        }
+
+        [Test]
         [TestCaseSource(nameof(GetInvalidNormValues),
             new object[]
             {
@@ -319,6 +335,22 @@
         }
 
         [Test]
+        public void ChangeComposition_InvalidAssessmentSectionComposition_ThrowsInvalidEnumArgumentException()
+        {
+            // Setup
+            const int invalidValue = 99;
+            var assessmentSection = new AssessmentSection(AssessmentSectionComposition.Dike);
+
+            // Call
+            TestDelegate call = () => assessmentSection.ChangeComposition((AssessmentSectionComposition) invalidValue);
+
+            // Assert
+            string expectedMessage = $"The value of argument 'newComposition' ({invalidValue}) is invalid for Enum type '{nameof(AssessmentSectionComposition)}'.";
+            string parameterName = TestHelper.AssertThrowsArgumentExceptionAndTestMessage<InvalidEnumArgumentException>(call, expectedMessage).ParamName;
+            Assert.AreEqual("newComposition", parameterName);
+        }
+
+        [Test]
         [TestCaseSource(nameof(GetFailureMechanismRelevancy))]
         public void ChangeComposition_ToTargetValue_UpdateContributionsAndFailureMechanismRelevancies(AssessmentSectionComposition composition,
                                                                                                       bool[] relevancies)