def METHOD_NAME(self):
    config_file_vars = {
        'region': 'us-west-2'
    }
    session = FakeSession(
        all_variables={'config_file': '/config/location'},
        config_file_vars=config_file_vars)
    session.session_var_map = {'region': ('region', "AWS_DEFAULT_REGION")}
    session.full_config = {
        'profiles': {'default': {'region': 'AWS_DEFAULT_REGION'}}}
    stream = six.StringIO()
    self.configure_list = ConfigureListCommand(session, stream)
    self.configure_list(args=[], parsed_globals=None)
    rendered = stream.getvalue()
    self.assertRegex(
        rendered, r'region\s+us-west-2\s+config-file\s+/config/location')