      testStyleSheet.disabled = false;

        /* Retrieve the actual viewport values for the test. */
        viewport.actualWidth = testElm.offsetWidth;
        viewport.actualHeight = testElm.offsetHeight;
        viewport.zoom = viewport.initialWidth / window.innerWidth;
    }

    /* Check viewport values. */
    test.step(function(){
        assert_equals(viewport.actualWidth, 300); assert_equals(viewport.actualHeight, 500);
    });

    /* Finished. Show the results. */
    test.done();
    testStyl