iddle = (getBox("mo1").bottom + getBox("mo1").top) / 2;
      assert_approx_equals(getBox("mo1").height,
                           14000 * emToPx, epsilon, "mo: size");
      assert_approx_equals(getBox("baseline1").bottom - moMiddle,
                           v1, epsilon, "mo: axis height");
    }, "AxisHeight (size variant)");

    test(function() {
      var v1 = 5000 * emToPx;
      var moMiddle = (getBox("mo2").bottom + getBox("mo2").top) / 2;
      assert_approx_equals(getBox("mo2").height,
        