QUnit.test( 'append', function( assert ) {
  'use strict';

  var imgUrls = [
    'http://i.imgur.com/bwy74ok.jpg',
    'http://i.imgur.com/bAZWoqx.jpg',
    'http://i.imgur.com/PgmEBSB.jpg',
    'http://i.imgur.com/aboaFoB.jpg',
    'http://i.imgur.com/LkmcILl.jpg',
    'http://i.imgur.com/q9zO6tw.jpg'
  ];

  // create images
  var fragment = document.createDocumentFragment();
  for ( var i=0, len = imgUrls.length; i < len; i++ ) {
    var img = document.createElement('img');
    img.src = imgUrls[i];
    fragment.appendChild( img );
  }

  var elem = document.querySelector('#append');
  elem.appendChild( fragment );
  var done = assert.async();

  imagesLoaded( elem, { debug: false } ).on( 'always', function() {
    assert.ok( 'appended images loaded' );
    done();
  }); 

});