Index: Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.IO.Test/Model/SerializableAssessmentSectionTest.cs
===================================================================
diff -u -rf567b2b8e99d56ee71cdb33116f85c0c918cc59e -r2f2055ad087e60f1c66914d69df623279b14bd95
--- Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.IO.Test/Model/SerializableAssessmentSectionTest.cs	(.../SerializableAssessmentSectionTest.cs)	(revision f567b2b8e99d56ee71cdb33116f85c0c918cc59e)
+++ Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.IO.Test/Model/SerializableAssessmentSectionTest.cs	(.../SerializableAssessmentSectionTest.cs)	(revision 2f2055ad087e60f1c66914d69df623279b14bd95)
@@ -75,9 +75,7 @@
         }
 
         [Test]
-        [TestCase(" ")]
-        [TestCase("")]
-        [TestCase(" InvalidId")]
+        [TestCaseSource(typeof(InvalidIdTestHelper), nameof(InvalidIdTestHelper.InvalidIdCases))]
         public void Constructor_InvalidId_ThrowsArgumentNullException(string invalidId)
         {
             // Setup