**Steps to replicate the issue** (include links if applicable):
`pwb timestripper_tests -v TestTimeStripperLanguage.test_timestripper_match_viwiki`
**What happens?**:
```
tests: max_retries reduced from 15 to 1
test_timestripper_match_viwiki (__main__.TestTimeStripperLanguage.test_timestripper_match_viwiki)
Test that correct date is matched on wikipedia:vi ... FAIL
======================================================================
FAIL: test_timestripper_match_viwiki (__main__.TestTimeStripperLanguage.test_timestripper_match_viwiki)
Test that correct date is matched on wikipedia:vi
----------------------------------------------------------------------
Traceback (most recent call last):
File "D:\pwb\GIT\core\tests\aspects.py", line 727, in wrapped_method
func(self, key)
File "D:\pwb\GIT\core\tests\timestripper_tests.py", line 235, in test_timestripper_match
self.assertEqual(self.ts.timestripper(txt_match), res)
AssertionError: None != datetime.datetime(2010, 2, 7, 19, 48, tzinfo=TZoneFixedOffset(0, UTC))
----------------------------------------------------------------------
Ran 1 test in 5.899s
FAILED (failures=1)
```
**Software version** :
Pywikibot 8.0.0.dev.0
```
>>> s = pywikibot.Site('vi')
>>> s.version()
'1.40.0-wmf.12'
```
**Other information**:
Seems month names was changed