Have you ever shipped a pytest suite that looked literate on your laptop and then went illiterate on the server? I spent two days chasing a collector crash that never reproduced on my Mac. I had pinned the same CPython minor and the same requirements lock, which made the gap feel insulting.
Source: [Dev.to](https://dev.to/codepy_1473/the-failure-message-had-a-checkmark-langc-refused-to-print-it-fkd)