Simpletest fails to create the field_config table I'm only just getting into TDD with Drupal and unfortunately run into trouble right away. For some reason the simpletest####field_config table isn't being created, and I don't get why; many other tables do get created. The (seemingly) relevant part of the error I get is: 


  Base table or view not found: 1146 Table &#039;mcdonalds.simpletest405637field_config&amp;#039 


coming from /modules/field/field.crud.inc (that is the project's root modules folder, NOT the modules folder in any theme or something).

I'm a bit stuck here, so I hope someone can tell me how to debug this, or even how to solve, that would be great of course;) Thanks!
The issue is definitely related to cache backends.

Disable cache backends if you are testing using Simpletest classes.