def METHOD_NAME(setup):
    """Ensure that is_on is FALSE when reading a flag that doesn't exist from local JSON file."""
    app.config['AUTH_LD_SDK_KEY'] = 'https://no.flag/avail'
    with app.app_context():
        flags = Flags()
        flags.init_app(app)
        flag_on = flags.is_on('missing flag')
    assert not flag_on