Cannot load custom Ember.Test helper inside component integration test using ember-qunit with ember-cli

I have a custom ember test helper that I want to use in an integration test for my component. I created the helper with ember cli using the command ember g test-helper component-helper, and double checked that everything follows the guide on the ember website. However, when I run ember test --server I get an error in the integration test stating that the helper is undefined because of an Object.TestLoader.moduleLoadFailure. Here is what I have:

helpers/component-helper.js

import Ember from 'ember';
import { test } from 'ember-qunit';

export default Ember.Test.registerHelper('componentHelper', function (app, name, opts) {
    opts = opts || {};

    test(name, function (assert) {
        if (opts.setup) {
            // we can use this to provide out component tests with stuff
            opts.setup.call(this);
        }

        andThen(() => this.render(Ember.HTMLBars.compile(opts.template)));
        andThen(() => opts.test.call(this, assert));
    });
});

helpers/start-app.js

import Ember from 'ember';
import Application from '../../app';
import config from '../../config/environment';
import './component-helper';

export default function startApp(attrs) {
  var application;

  var attributes = Ember.merge({}, config.APP);
  attributes = Ember.merge(attributes, attrs); // use defaults, but you can override;

  Ember.run(function() {
    application = Application.create(attributes);
    application.setupForTesting();
    application.injectTestHelpers();
  });

  return application;
}

integration/pods/components/input-checkbox/component-test.js

import { moduleForComponent } from 'ember-qunit';

moduleForComponent('input-checkbox', 'Integration | Component | input checkbox', {
  integration: true
});

componentHelper('regular checkbox', {
    template: '{{input-checkbox}}',

    test(assert) {
        assert.equal(1, 1);
    }
});