I'm still seeing the issue on https://github.com/python/cpython/pull/12255 (freshly rebased to master to have 2cc0223f43a1ffd59c887a73e2b0ce5202f3be90.

On this build: https://dev.azure.com/Python/cpython/_build/results?buildId=42065

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ERROR: test_networked_good_cert (test.test_httplib.HTTPSTest)
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Traceback (most recent call last):
  File "/home/vsts/work/1/s/Lib/test/test_httplib.py", line 1632, in test_networked_good_cert
    h.request('GET', '/')
  File "/home/vsts/work/1/s/Lib/http/client.py", line 1221, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "/home/vsts/work/1/s/Lib/http/client.py", line 1267, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "/home/vsts/work/1/s/Lib/http/client.py", line 1216, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/home/vsts/work/1/s/Lib/http/client.py", line 1004, in _send_output
    self.send(msg)
  File "/home/vsts/work/1/s/Lib/http/client.py", line 944, in send
    self.connect()
  File "/home/vsts/work/1/s/Lib/http/client.py", line 1383, in connect
    self.sock = self._context.wrap_socket(self.sock,
  File "/home/vsts/work/1/s/Lib/ssl.py", line 405, in wrap_socket
    return self.sslsocket_class._create(
  File "/home/vsts/work/1/s/Lib/ssl.py", line 853, in _create
    self.do_handshake()
  File "/home/vsts/work/1/s/Lib/ssl.py", line 1117, in do_handshake
    self._sslobj.do_handshake()
ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate (_ssl.c:1055)

which does not looks covered by 2cc0223f43a1ffd59c887a73e2b0ce5202f3be90 which only checks for key too weak.