Index: Application/Ringtoets/test/Application.Ringtoets.Storage.TestUtil/TestDbSet.cs
===================================================================
diff -u -r4e14ed090d09a220a790b3562ceb4232dab1cce6 -rbc9552772d4e6a6bd786dfcaef808da1964e8c53
--- Application/Ringtoets/test/Application.Ringtoets.Storage.TestUtil/TestDbSet.cs	(.../TestDbSet.cs)	(revision 4e14ed090d09a220a790b3562ceb4232dab1cce6)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.TestUtil/TestDbSet.cs	(.../TestDbSet.cs)	(revision bc9552772d4e6a6bd786dfcaef808da1964e8c53)
@@ -74,7 +74,8 @@
 
         public override IEnumerable<T> RemoveRange(IEnumerable<T> entities)
         {
-            foreach (var e in entities)
+            var list = entities.ToList();
+            foreach (var e in list)
             {
                 collection.Remove(e);
             }