Index: Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.IO.Test/Model/SerializableFailureMechanismSectionCollectionTest.cs
===================================================================
diff -u -r5a7fbd8f43c609641b0a1398e2cab204a46542bf -r2f2055ad087e60f1c66914d69df623279b14bd95
--- Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.IO.Test/Model/SerializableFailureMechanismSectionCollectionTest.cs	(.../SerializableFailureMechanismSectionCollectionTest.cs)	(revision 5a7fbd8f43c609641b0a1398e2cab204a46542bf)
+++ Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.IO.Test/Model/SerializableFailureMechanismSectionCollectionTest.cs	(.../SerializableFailureMechanismSectionCollectionTest.cs)	(revision 2f2055ad087e60f1c66914d69df623279b14bd95)
@@ -67,9 +67,7 @@
         }
 
         [Test]
-        [TestCase(" ")]
-        [TestCase("")]
-        [TestCase(" InvalidId")]
+        [TestCaseSource(typeof(InvalidIdTestHelper), nameof(InvalidIdTestHelper.InvalidIdCases))]
         public void ConstructorWithFailureMechanism_InvalidId_ThrowsArgumentNullException(string invalidId)
         {
             // Call
@@ -129,9 +127,7 @@
         }
 
         [Test]
-        [TestCase(" ")]
-        [TestCase("")]
-        [TestCase(" InvalidId")]
+        [TestCaseSource(typeof(InvalidIdTestHelper), nameof(InvalidIdTestHelper.InvalidIdCases))]
         public void ConstructorWithTotalAssemblyResult_InvalidId_ThrowsArgumentNullException(string invalidId)
         {
             // Call