I marked bpo-38954 as duplicate of this issue. Copy of its message:
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 This issue is probably duplicate of some other, but I decided to make one new one due to the fact that this affect all Fedora build bots.


test test_ssl failed
test_timeout_connect_ex (test.test_ssl.NetworkedTests) ... ok
======================================================================
FAIL: test_min_max_version (test.test_ssl.ContextTests)
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Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.8.cstratak-fedora-rawhide-x86_64.lto-pgo/build/Lib/test/test_ssl.py", line 1207, in test_min_max_version
    self.assertEqual(
AssertionError: <TLSVersion.TLSv1_3: 772> != <TLSVersion.MAXIMUM_SUPPORTED: -1>
----------------------------------------------------------------------
Ran 161 tests in 2.681s
FAILED (failures=1, skipped=11)
1 test failed again:
    test_ssl

Example failure:

https://buildbot.python.org/all/#/builders/222
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