Disable Flask's debug logger if testing mode enabled

settings.py

import logging
import os


DEBUG = False
TESTING = 'TESTING' in os.environ or 'nosetests' in os.environ.get('_', '')


try:
    from settings_local import *
except ImportError:
    pass


if TESTING and DEBUG:
    from flask import logging as flask_logging

    def mock_create_logger(app):
        return logging.getLogger(app.logger_name)

    flask_logging.create_logger = mock_create_logger