0. Place attached temporary file mdl44991.feature in the location course/tests/behat within your Moodle installation. 1. Ensure Behat is working in general, including running the behat init script. 2. Run Behat with --tags=mdl44991 EXPECTED: You should see 2 scenarios both passed (usually takes a minute or two). 3. Edit the .feature file to change both instances of 'has-region-side-pre' by removing the x from the name (so that the attribute does now contain that value). 4. Rerun the same test EXPECTED: This time there should be 2 failures indicated and you should see a message like: 01. The attribute "class" contains "haxs-region-side-pre" (value: "format-site course path-site [...and so on, it's kind of a long attribute....] ")