");
  assert_false(element instanceof HTMLSpanElement, "Should not be an HTMLSpanElement");
}, "Upper-case HTML element with a prefix");

test(function() {
  var element = document.createElementNS("test", "SPAN");
  assert_equals(element.namespaceURI, "test");
  assert_equals(element.prefix, null);
  assert_equals(element.localName, "SPAN");
  assert_equals(element.tagName, "SPAN");
  assert_true(element instanceof Node, "Should be a Node");
  assert_true(element instanceof Element, "Should be an Element");