text: setup({ single_test: true });
  
  
  var root = document.createElement("div");
  for (var i = 0; i < 12; i++) {
    var child = document.createElement("span");
    if (i == 11)
    child.id = "pass";
    root.appendChild(child);
  }
  
  assert_equals(root.querySelector(":nth-child(12)").id, "pass");
  done();
  