As I write this, the checks on master are currently failing on Travis and GitHub actions due to test_integration.py.

https://travis-ci.org/github/pypa/twine/jobs/718433234
https://github.com/pypa/twine/runs/991209553

I've noticed this intermittently since the tests were added, but it seems to be more of a problem lately.

TODO:

• Use pytest-rerunfailures to allow flaky server responses Mitigate flaky integration tests #686
• Consider using VCR.py to record and playback valid server responses (instead of making them each time; this would speed up the tests and remove the flakiness) Use VCR.py for PyPI integration tests #703
• Use a separate GH Action job (and maybe tox testenv) for integration tests to clearly distinguish them from the "fast" tests Use separate environmment for integration tests #704
• Reconsider testing strategy: Fix/mitigate flaky integration tests #684 (comment)
• Try using PyPI instead of TestPyPI: Mitigate flaky integration tests #686 (comment)