Make test more descriptive.

Probably there are more tests where we could use a better wording, my argument for this is that when there is a failure is really hard to find out immediately what's going on both with phantom or the web interface. 

![failing-test](https://www.evernote.com/shard/s191/sh/e00bbde4-d3f8-4b80-899b-88d6561dd5dc/89e71d51f284b757c1748ac9856d7bc4/res/c4148da4-c9fd-4f1c-af27-1feb9e1c345c/skitch.png?resizeSmall&width=832)

Or the ci:

          Running "testem:ci:basic" (testem:ci) task
          
            ..
          
            2 tests complete (3254 ms)
          
            1) description: the model
               failed