=================================== FAILURES ===================================
_______________________ TestDeletionBotWrite.test_delete _______________________

self = <tests.deletionbot_tests.TestDeletionBotWrite testMethod=test_delete>

    def test_delete(self):
        """Test deletionbot on the test wiki."""
        site = self.get_site()
        cat = pywikibot.Category(site, 'Pywikibot Delete Test')
        delete.main('-cat:Pywikibot_Delete_Test', '-always')
        self.assertIsEmpty(list(cat.members()))
        delete.main('-page:User:Unicodesnowman/DeleteTest1', '-always',
>                   '-undelete', '-summary=pywikibot unit tests')

tests/deletionbot_tests.py:36: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
scripts/delete.py:292: in main
    bot.run()
pywikibot/bot.py:1561: in run
    self.treat(page)
pywikibot/bot.py:1814: in treat
    self.treat_page()
scripts/delete.py:195: in treat_page
    self.current_page.undelete(self.summary)
pywikibot/page/_basepage.py:2122: in undelete
    self.site.undelete(self, reason, revision=undelete_revs)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = APISite("test", "wikipedia")
args = (PageWithRefs('User:Unicodesnowman/DeleteTest1'), '')
kwargs = {'revision': []}

    def callee(self, *args, **kwargs):
        if self.obsolete:
            if not self.has_group('steward'):
                raise UserRightsError(CLOSED_WIKI_MSG.format(site=self))
    
        elif right is not None and not self.has_right(right):
            if os.environ.get('PYWIKIBOT_TEST_RUNNING', '0') == '1':
                rights = ' but:\n' + fill(
                    str(sorted(self.userinfo['rights'])),
                    width=76, break_on_hyphens=False)
            else:
                rights = '.'
            raise UserRightsError(
                f'User "{self.user()}" does not have required user right '
                f'"{right}" on site {self}{rights}')
>       return fn(self, *args, **kwargs)
E       TypeError: undelete() got an unexpected keyword argument 'revision'