h 1000.
      var v1 = 5000 * emToPx;
      var radicalSymbolWidth = 1000 * emToPx;
      var radicalLeft = getBox("base004").left - radicalSymbolWidth;
      assert_approx_equals(getBox("index004").right - radicalLeft,
                           v1, epsilon,
                           "mroot: kern after degree");
    }, "RadicalKernAfterDegree");

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

      var v1 = 4000 * emToPx;
      assert_approx_equals(getBox("index005").left -