How do you organize yung acceptance tests in Ember?

I believe in the concept that for every user story, there should be an acceptance tests to indicate that the story is done and it works. However, this won't scale when you already have numerous acceptance tests. Everything will live in the root of tests/acceptance/ directory.

I'm thinking of making it that there should be an acceptance test file for every route and all acceptance test for it should live in that file. I'm curious though of what other possible conventions there are for organizing acceptance tests. Any other suggestions?