New submission from Denis Osipov : In Developer Guide says: "If you don’t have easy access to a command line, you can run the test suite from a Python or IDLE shell:

...

...

from test import autotest"

But I can't run test from IDLE: Traceback (most recent call last): File "", line 1, in <module> from test import autotest File "D:\repos\cpython\Lib\test\autotest.py", line 5, in <module> main() File "D:\repos\cpython\Lib\test\libregrtest\main.py", line 585, in main Regrtest().main(tests=tests, **kwargs) File "D:\repos\cpython\Lib\test\libregrtest\main.py", line 510, in main self._main(tests, kwargs) File "D:\repos\cpython\Lib\test\libregrtest\main.py", line 524, in _main setup_tests(self.ns) File "D:\repos\cpython\Lib\test\libregrtest\setup.py", line 18, in setup_tests faulthandler.enable(all_threads=True) io.UnsupportedOperation: fileno If I understand it correct, this behavior is reasonable (issues 3003 and 25588). Maybe it's worth to remove words about running from IDLE. Or in case if it's possible to run such tests add some words about it. ---------- assignee: docs@python components: Documentation messages: 304163 nosy: denis-osipov, docs@python priority: normal severity: normal status: open title: Possible error in devguide part about tests type: behavior versions: Python 3.7, Python 3.8 _______________________________________ Python tracker https://bugs.python.org/issue31761 _______________________________________