Requirements Ability to find, amend and run Behat scenario files locally. Testing Find a Behat scenario that makes use of the And I navigate to "..." in site administration step.  For instance, there is one in admin/tests/behat/purge_caches.feature: " And I navigate to "Development > Purge caches" in site administration " Edit this .feature file and change the path to the admin page to a non-existing one (i.e. "Development > Purge cachesX"). Run that edited Behat scenario.  mdk behat -r -n "Purge selected caches without selecting any caches" TEST : Check that the Behat error reads like Link "..." not found. and not Link "..." not found on the page not found.