t) - getBox("msubsupBase").left, e, "msubsup: width is determined by the left/right sides of base/scripts (+ some space after script)");
    }, "Width of scripted elements");

    test(function() {
      assert_true(MathMLFeatureDetection.has_mspace());

      var e = 1;
      assert_greater_than_equal(getBox("msub").height, getBox("msubBase").height, e, "msub: height is at least the one of the base");
      assert_greater_than_equal(getBox("msup").height, getBox("msupBase").height, e, "msup: height is at l