text: const NEAR_ZERO = 5e-6; // 0.000005, Firefox fails at higher levels of precision.
  
  /**
   * Checks that the supplied values are equal with a high though not absolute degree of precision.
   * @param {Float} actual
   * @param {Float} expected
   * @param {string} message
   * @returns {undefined}
   */
  function almostEquals (actual, expected, message) {
    message = message || (actual + ' did not equal ' + expected);
    this.pushResult({
      result: Math.abs(actual - expected) < NEAR_ZERO,
      actual,
      expected,
      message
    });
  }
  
  /**
   * @param {external:qunit} QUnit
   * @returns {external:qunit} The same instance passed in after extending
   */
  export default function extend (QUnit) {
    QUnit.extend(QUnit.assert, {
      almostEquals
    });
    return QUnit;
  }
  