With en.wp as test site:
====================================================================== FAIL: test_featured (tests.script_tests.TestScriptSimulate) Test running featured -simulate. ---------------------------------------------------------------------- Traceback (most recent call last): File "tests/script_tests.py", line 295, in testScript stderr_other) AssertionError: u'Use -help for further information.' not found in [u'Link FA does not exist', u'', u'NOTE: featured articles are not implemented at wikipedia:en.', u'0 pages written.']
With ar.wp
====================================================================== FAIL: test_featured (tests.script_tests.TestScriptSimulate) Test running featured -simulate. ---------------------------------------------------------------------- Traceback (most recent call last): File "tests/script_tests.py", line 295, in testScript stderr_other) AssertionError: u'Use -help for further information.' not found in [u'\u0648\u0635\u0644\u0629 \u0645\u0642\u0627\u0644\u0629 \u0645\u062e\u062a\u0627\u0631\u0629 does not exist', u'', u'NOTE: featured articles are not implemented at wikipedia:ar.', u'0 pages written.']
featured.py was recently 'archived' in T109210: [RFC] featured.py is outdated for wm projects, but I am not sure if that is the cause.