ES6 replacement for Ember.testing


When adding ember-simple-auth to a project, I noticed that Ember.testing is being used, for instance here

I was wondering if there is an ES6 replacement, as importing Ember from 'ember' will probably cause issues with three shaking in the future?

I noticed that using Ember.testing without an import seems to work fine, however I am not quite sure if this is something that should be done at all…