Fix generate_test_file_spec

What does this MR do and why?

fix failed pipeline job: https://jihulab.com/gitlab-cn/gitlab/-/jobs/9096314

related upstream MR: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/128501/diffs#diff-content-fa22d271612aa021b3b9d4be8da735bfc0102f44

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