No Tests Running with Ember CLI

I've setup a model that I would like to unit test in Ember but every time I run the test suite, no matter what I do, I get 0 tests ran.

$ ember test
version: 1.13.1
Built project successfully. Stored in "/Users/BenAMorgan/Sites/frontend/tmp/class-tests_dist-pjaTeNtp.tmp".

1..0
# tests 0
# pass  0
# fail  0

# ok
No tests were run, please check whether any errors occurred in the page (ember test --server) and ensure that you have a test launcher (e.g. PhantomJS) enabled.

The model:

// app/models/feature.js
import DS from 'ember-data';

export default DS.Model.extend({
  title: DS.attr('string'),
  description: DS.attr('string')
});

What the test looks like:

// tests/unit/models/feature-test.js
import { moduleForModel, test } from 'ember-qunit';

moduleForModel('feature', 'Unit | Model | feature', {
  // Specify the other units that are required for this test.
  needs: []
});

test('it exists', function(assert) {
  var model = this.subject();
  // var store = this.store();
  assert.ok(!!model);
});

All the npm dependencies installed without errors. Testem is installed. PhantomJS is installed via npm. Not sure where I'm going wrong.