Run some good repetitions (say 50) of the "A user can navigate to previous and next discussions" feature, ensuring that it's executed in a quick server (able to create all the discussions and forums in the scenarios in the very same second). Alternatively, look to the builds that have been posted in this issue, because they are showing how the feature is performing now. Verify that the repetition builds launched or checked in the previous points are passing. Verify (also) that all the PHPUnit and Behat builds in the issue (ToBiC) are passing.