Ah right I didn't see that when I made the remark about this line. @samwgoldman it should be rather easy to move these adapter references away, think `config.let(:options) { ... }` and using that in the adapter specs. Different topic/PR though.

Also agree that it's useful being able to run individual spec files. When running the whole suite, the overhead is not just from the rest of the suite, but also from booting Rake (in the case of `bundle exec rake`). You also get to enjoy RSpec's CLI options. But again, different topic, and should be dealt with in another PR, for the sake of this PR's clarity.