Why isn't this alternative to the deprecated Factory.set_creation_function working with nosetests?

Why isn't this alternative to the deprecated Factory.set_creation_function working with nosetests?

python flask sqlalchemy flask-sqlalchemy nose

flask

Generating fixture data with Python's fixture module

python sqlalchemy flask nose

flask

Checking flash messages in flask application nose tests

python flask nose nosetests flash-message

flask

unit testing flask app with login_required

python unit-testing flask nose

flask

Flask test_client is not restarted at setUp() of unittest.TestCase

unit-testing flask nose

flask

ImportError: No module named config on Travis-CI build

python configuration flask nose travis-ci

flask

flask - unit testing session with nose

python python-3.x flask nose

flask

Flask-Script command that passes all remaining args to nose?

python flask nose flask-script

flask

put() throwing error while unit testing NDB based Flask app in GAE

python google-app-engine google-cloud-datastore flask nose

flask

Flask application randomly refuses connections when testing

python unit-testing flask python-requests nose

flask

Message queues- how do I know who I am?

python flask rabbitmq celery nose

flask

Relative vs. Absolute imports for Flask and nose

python-3.x flask nose

flask