Against 1.6b4, something with BooleanField has changed. Run the test suite, `IntegrityError: testapp_root.my_boolean may not be NULL` You need to modify the manage.py there a little bit, set a `SECRET_KEY` ... https://github.com/skyl/milkman/commit/7dae03a9fcd4d988656781b09f39e4519d24680e