Why the hell do we need tests for CSS?
Pulling down the latest code from your repo, you see that one of your team has added some new features. "Great!", you think, as you compile the code, switch to your browser and hit refresh.
But what.... horror is this? The site is broken. Elements look bloated, the navigation icons are wrapping around each other, the search box is making a break for the border and where the hell have your grids gone?