def METHOD_NAME(*args, **kwargs):
    """Helper function for `subprocess.check_output()`.
    Install tests should use this function instead of
    `subprocess.check_output()`. This function is a simple helper function that
    calls `subprocess.check_output()` and updates the current working directory
    to `/`.
    """
    if 'env' in kwargs:
        env = kwargs.pop('env')
    else:
        env = os.environ
    return subprocess.METHOD_NAME(
        cwd='/', env=env, *args, **kwargs).decode('utf8')