nt.getElementById('checkbox1'),
            checkbox2 = document.getElementById('checkbox2');

        label.click();
        assert_true(checkbox1.checked, "checkbox should be checked")
        assert_false(checkbox2.checked, "checkbox should not be checked")

        label.click();
        assert_false(checkbox1.checked, "checkbox should not be checked")
        assert_false(checkbox2.checked, "checkbox should not be checked")
    }, "Check if click on label selects 1st item (checkbox button)");

    test