Ember 1.11 lookup route:application oddity when testing

In Ember 1.10, the following code works:

App.__container__.lookup('route:application')

In Ember 1.11, it returns undefined.

When my test is run in isolation, it works, so my issue has to be something to do with clean up of code. I'm using:

module("Integration App Test", {
  teardown: function() {
    App.reset();
  }
});

But that doesn't seem to be working correctly