In forms validate dictionaries, the example makes no sense. At first, I assumed this was a duplicate key issue, but I cannot reproduce this problem.

>>> good_form = MyForm({"title": "Two Scoops of Django"}) >>> good_form.is_valid() True >>> good_form.errors {} >>> bad_form = MyForm({"title": "Two Scoops of Django"}) >>> bad_form.is_valid() True >>> bad_form.errors {}