bject3).color, "rgb(0, 0, 0)",
                  "subject3 should be black");

    await test_driver.send_keys(document.body, tab_key);
    assert_equals(getComputedStyle(subject2).color, "rgb(0, 128, 0)",
                  "subject2 should be green");
    assert_equals(getComputedStyle(subject4).color, "rgb(0, 100, 0)",
                  "subject4 should be darkgreen");

    focusme4.remove();
    assert_equals(getComputedStyle(subject2).color, "rgb(0, 0, 0)",
                  "subject2 should be black");