It appears following unit tests are broken, I ran the tests on 4.1 Moodle
core_privacy\privacy\provider_test::test_userdata_provider_implements_userlist with data set "block_stash" ('block_stash', 'block_stash\privacy\provider')
Failed asserting that false is true.
privacy/tests/privacy/provider_test.php:213
lib/phpunit/classes/advanced_testcase.php:80
vendor/phpunit/phpunit/phpunit:97
It appears following unit tests are broken, I ran the tests on 4.1 Moodle