Drupal testing

It's a Monday morning and you push your first bit of code for the week. Suddenly all your Javascript tests start failing with crazy errors you've never seen before! And it's not just happening on one project! This post will hopefully help you track down the fix to the Bad Message 400 errors plaguing WebDriver.

Several times in the past I've been caught out by Drupal's cron handler silently catching exceptions during tests.

Your test fails, and there is no clue as to why.

Read on to find out how to shine some light on this, by making your kernel tests fail on any exception during cron.