Duck-punch the `QUnit.test` method to support Mocha-style "pending" tests. UPDATE: As of QUnit v1.16.0, `QUnit.skip` will be a core part of the framework.

qunit.pending.js

/*global QUnit, window, global */

(function (QUnit, global) {
  'use strict';

  var document = global && global.document;
  var pendingTestIds = [];
  var QUnit_test = QUnit.test;

  QUnit.test = function(testName, expected, callback, async) {
    if (typeof expected === 'function' && typeof callback === 'undefined') {
      callback = expected;
      expected = null;
    }
    async = async === true;

    if (typeof callback === 'function') {
      QUnit_test(testName, expected, callback, async);
    }
    else {
      testName = '[PENDING] ' + testName;
      // NOTE: If `expected > 0`, the test will FAIL
      expected = expected || 0;
      if (expected !== 0) {
        QUnit_test(testName, expected, callback, async);
      }
      else {
        QUnit_test(testName, expected, function() {
          pendingTestIds.push(QUnit.config.current.id);
        });
      }
    }
  };

  // If running in the browser
  if (document && document.getElementById) {
    // When the test run is completed, go through all of the pending tests and update their HTML
    QUnit.done(function() {
      for (var i = 0, len = pendingTestIds.length; i < len; i++) {
        var li = document.getElementById(pendingTestIds[i]);
        li.className = 'pending';
        li.style.background = '#FFFF99';
      }
    });
  }

  // Export the global `test` but only if it is exported globally already
  if (global.test === QUnit_test) {
    global.test = QUnit.test;
  }

}(QUnit, window || global || this));