How to inject the store into an Ember.Service in unit tests?

In my app I have this initializer which injects the store into all services:

export function initialize(container, application) {
  application.inject('service', 'store', 'store:main');
}

export default {
  name: 'inject-store-in-services',
  initialize: initialize
};

My problem is that when I run unit tests, services don’t have the store property. So my question: is there a way to achieve what my initializer does but inside a unit test context?