For lack of better things to do with that... https://bugs.python.org/issue43382 filed to track it.

On Tue, Mar 2, 2021 at 7:30 PM Gregory P. Smith <greg@krypto.org> wrote:

On Tue, Mar 2, 2021 at 6:44 PM Senthil Kumaran <senthil@python.org> wrote:
Hello Python Developers,

I notice TLS tests failing in the ssl test suite in master, 3.9 and
3.8 branches.

https://github.com/python/cpython/runs/2018191733

Is it to do with infrastructure, certificate? I am unable to determine
it exactly.
The failure is observed upon merge to master. or with 3.8, 3.9
backports of any PR.

It's not just you.  This is holding PRs up.  It started within the last ~18 hours?

-gps