Index: test/Common/DelftTools.Tests/TestObjects/Parent.cs
===================================================================
diff -u -r5fc71a385897af92ccb092f2f969b5709afab85a -r616892066b6752b40088bb870b4d577a2ac24ac3
--- test/Common/DelftTools.Tests/TestObjects/Parent.cs	(.../Parent.cs)	(revision 5fc71a385897af92ccb092f2f969b5709afab85a)
+++ test/Common/DelftTools.Tests/TestObjects/Parent.cs	(.../Parent.cs)	(revision 616892066b6752b40088bb870b4d577a2ac24ac3)
@@ -4,7 +4,7 @@
 {
     public class Parent
     {
-        public IList<Child> Children = new List<Child>();
+        public readonly IList<Child> Children = new List<Child>();
         public string Name { get; set; }
     }
 }
\ No newline at end of file