title: Uncaught Error: Assertion Failed: calling set on destroyed object
body: <p>working in ember-cli testing. After all tests passed it returns extra two test with errors.</p>
  
  <blockquote>
    <p>Uncaught Error: Assertion Failed: calling set on destroyed object
    Source : '../dist/assets/vendor.js:13269'</p>
  </blockquote>
  
  <p>this is one unit test configuration</p>
  
  <pre><code>import Ember from "ember";
  import { test,moduleFor } from 'ember-qunit';
  import startApp from '../helpers/start-app';
  
  var App;
  
  module('An Integration test',{
      setup:function(){
          App=startApp();
      },
      teardown: function() {
          Ember.run(App, 'destroy');
      }
  });
  </code></pre>