Discovered while investigating this failed build: https://ci.moodle.org/job/W.03.03%20-%20Behat%20-%20Chrome%20+%20MariaDB%20(lowest)/1612/

For some reason when the test fails course index is showing an activity that is supposed to be hidden:

Running the test locally, the activity is hidden on the course index and main page:

As an workaround for the behat failure we have made the verification more specific, changing it to: I should not see "Test lesson" in the "region-main" "region"... ideally we should be able to use just: I should not see "Test lesson"

Affected scenario is "Lesson activity access can be restricted" in mod/lesson/tests/behat/lesson_restrict_access.feature