Test test_locale failed when running cpython test on Windows 10 x64 python.bat -m test -j3 on version Python 3.9.0a6+
0:19:51 load avg: 0.00 [209/423/2] test_locale failed
test test_locale failed -- Traceback (most recent call last):
File "C:\personal\cpython\cpython\lib\test\test_locale.py", line 566, in test_getsetlocale_issue1813
locale.setlocale(locale.LC_CTYPE, loc)
File "C:\personal\cpython\cpython\lib\locale.py", line 610, in setlocale
return _setlocale(category, locale)
locale.Error: unsupported locale setting