Issue with ember test: beforeEach failed on it exists

I have this code that doesn't work fine in a test:

  click('#home');
  andThen(function() {
    assert.equal(currentPath(), 'index');
  });

beforeEach failed on it exists: Attempting to register an unknown factory: `model:app/index

but running ember server it works fine, I also have the mocks set up correct.