I very much agree- but swapping out the database is a scary operation if you use the database for any sort of nontrivial logic. You need to make sure that your

I very much agree- but swapping out the database is a scary operation if you use the database for any sort of nontrivial logic. You need to make sure that your unique indicies, partial indicies, constraints, views, triggers, etc. work just as well. Another option is to start each test in an isolated transaction and roll back at the end instead of committing, but that comes with its own set of headaches too.