Title: test_ssl fails on Windows buildbots
Type: Stage: patch review
Components: Versions: Python 3.10
Status: open Resolution:
Dependencies: Superseder:
Assigned To: christian.heimes Nosy List: christian.heimes, pablogsal, steve.dower
Priority: deferred blocker Keywords: patch

Created on 2021-04-23 10:56 by pablogsal, last changed 2021-04-24 13:08 by christian.heimes.

Pull Requests
URL Status Linked Edit
PR 25561 merged christian.heimes, 2021-04-23 17:26
PR 25574 merged christian.heimes, 2021-04-24 10:22
Messages (4)
msg391677 - (view) Author: Pablo Galindo Salgado (pablogsal) * (Python committer) Date: 2021-04-23 10:56

Extract from the logs:

The Buildbot has detected a new failure on builder AMD64 Windows8.1 Non-Debug 3.x while building python/cpython.
Full details are available at:

Buildbot URL:

Worker for this Build: ware-win81-release

Build Reason: <unknown>
Blamelist: E-Paine <>, Raymond Hettinger <>, Simon Charette <>, Steve Dower <>

BUILD FAILED: failed test (failure)

Summary of the results of the build (if available):

== Tests result: FAILURE then FAILURE ==

395 tests OK.

10 slowest tests:
- test_multiprocessing_spawn: 2 min 43 sec
- test_concurrent_futures: 2 min 25 sec
- test_io: 1 min 43 sec
- test_largefile: 1 min 41 sec
- test_peg_generator: 1 min 39 sec
- test_mmap: 1 min 19 sec
- test_asyncio: 58.8 sec
- test_regrtest: 45.3 sec
- test_unparse: 44.1 sec
- test_tokenize: 41.1 sec

1 test failed:

30 tests skipped:
    test_curses test_dbm_gnu test_dbm_ndbm test_devpoll test_epoll
    test_fcntl test_fork1 test_gdb test_grp test_ioctl test_kqueue
    test_multiprocessing_fork test_multiprocessing_forkserver test_nis
    test_openpty test_ossaudiodev test_pipes test_poll test_posix
    test_pty test_pwd test_readline test_resource test_spwd
    test_syslog test_threadsignals test_wait3 test_wait4
    test_xxtestfuzz test_zipfile64

1 re-run test:

Total duration: 9 min 15 sec

Captured traceback

Traceback (most recent call last):
   File "D:\buildarea\3.x.ware-win81-release.nondebug\build\lib\test\", line 2333, in wrap_conn
    self.sslconn = self.server.context.wrap_socket(
   File "D:\buildarea\3.x.ware-win81-release.nondebug\build\lib\", line 518, in wrap_socket
    return self.sslsocket_class._create(
   File "D:\buildarea\3.x.ware-win81-release.nondebug\build\lib\", line 1070, in _create
   File "D:\buildarea\3.x.ware-win81-release.nondebug\build\lib\", line 1339, in do_handshake
 ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate (_ssl.c:969)

Traceback (most recent call last):
  File "D:\buildarea\3.x.ware-win81-release.nondebug\build\lib\test\", line 255, in wrapper
    return func(*args, **kw)
  File "D:\buildarea\3.x.ware-win81-release.nondebug\build\lib\test\", line 3171, in test_wrong_cert_tls13"Use of invalid cert should have failed!")
AssertionError: Use of invalid cert should have failed!

Test report

Failed tests:

- test_ssl

Failed subtests:

- test_wrong_cert_tls13 - test.test_ssl.ThreadedTests

 -The Buildbot
msg391717 - (view) Author: Christian Heimes (christian.heimes) * (Python committer) Date: 2021-04-23 18:03
New changeset e047239eafefe8b19725efffe7756443495cf78b by Christian Heimes in branch 'master':
bpo-43921: ignore failing test_wrong_cert_tls13 on Windows (GH-25561)
msg391725 - (view) Author: Christian Heimes (christian.heimes) * (Python committer) Date: 2021-04-23 18:47
Another TLS 1.3 client cert auth test is flaky, too.

FAIL: test_pha_required_nocert (test.test_ssl.TestPostHandshakeAuth)
Traceback (most recent call last):
  File "D:\buildarea\pull_request.bolen-windows10\build\lib\test\", line 4412, in test_pha_required_nocert
AssertionError: SSLError not raised
msg391775 - (view) Author: Christian Heimes (christian.heimes) * (Python committer) Date: 2021-04-24 13:08
New changeset ce9a0643496ba802ea97a3da20eace3a1117ea48 by Christian Heimes in branch 'master':
bpo-43921: also accept EOF in post-handshake auth test (GH-25574)
Date User Action Args
2021-04-24 13:08:16christian.heimessetmessages: + msg391775
2021-04-24 10:22:33christian.heimessetpull_requests: + pull_request24293
2021-04-23 18:47:42christian.heimessetmessages: + msg391725
2021-04-23 18:03:33christian.heimessetmessages: + msg391717
2021-04-23 17:37:13pablogsalsetpriority: normal -> deferred blocker
2021-04-23 17:26:43christian.heimessetkeywords: + patch
stage: patch review
pull_requests: + pull_request24280
2021-04-23 11:18:15christian.heimessetnosy: + steve.dower
2021-04-23 10:56:18pablogsalcreate