[3.8] bpo-38323: Skip SubprocessMultiLoopWatcherTest as they can hang the test suite (GH-26542) by miss-islington · Pull Request #26670 · python/cpython
Even if the 3.8 branch no longer accepts bugfixes, Refleak buildbot workers are still run on this branch: "scheduler: 3.8-daily". Example of job: aarch64 RHEL8 Refleaks 3.8.
https://buildbot.python.org/all/#/builders/225
I propose to backport the test_asyncio fix to prevent the test suite to hang randomly after 3 hours: https://bugs.python.org/issue38323
Maybe the buildbot configuration should be modified to no longer run the 3.8 branch. In this case, we don't need this backport (the hang is random and unlikely).