The new pytest-cov 2.10.0 requires pytest>=4.6 but pytest 4.3.1 is used for Python < 3.5 which is strange because dev-requirements.txt says pytest>=3.6.0,<5.0.0 ; python_version < '3.5'
See https://api.travis-ci.org/v3/job/700032657/log.txt for example
Change 605363 had a related patch set uploaded (by Xqt; owner: Xqt):
[pywikibot/core@master] [dev] Force pytest >= 4.6.0 which is required by pytest-cov 2.10
Change 606709 had a related patch set uploaded (by Dvorapa; owner: Dvorapa):
[pywikibot/core@master] [bugfix] Fix pytest, pytest-cov and pytest-timeout requirements
Change 605363 abandoned by Xqt:
[dev] Force pytest >= 4.6.0 which is required by pytest-cov 2.10
Reason:
inf favour of https://gerrit.wikimedia.org/r/#/c/pywikibot/core/ /606709/
Change 606709 merged by jenkins-bot:
[pywikibot/core@master] [bugfix] Fix pytest, pytest-cov and pytest-timeout requirements
CHANGELOG of pytest-cov says they dropped support for py < 3.5, but they mean py3 < 3.5. Arghhhhhhh. Fixed in quick patch, should be ok now
Change 606722 had a related patch set uploaded (by Dvorapa; owner: Dvorapa):
[pywikibot/core@master] [bugfix] Make Travis update pytest
Change 606722 merged by jenkins-bot:
[pywikibot/core@master] [bugfix] Make Travis update pytest
Last patch works finally. Travis is now forced to uninstall and then reinstall pytest, which resolves all version conflicts.