def METHOD_NAME(self):
    nested_dir = os.path.join(TEST_REPOS_DIR, "multi_repos_nested")
    # Fails to find any tools without -r.
    lint_cmd = ["lint", "--skip", "citations", nested_dir]
    self._check_exit_code(lint_cmd, exit_code=2)
    # Works with -r.
    lint_cmd = ["lint", "--skip", "citations", "-r", nested_dir]
    self._check_exit_code(lint_cmd, exit_code=0)