 isn't serialized if border-image longhands are not initial");
    }, "Declaration with border longhands is not serialized to a border shorthand declaration.");
    test(function() {
        let rule = document.getElementById('target').sheet.cssRules[1];
        assert_equals(rule.style.border, "", "border shorthand isn't serialized if border-image longhands are not initial");
    }, "Declaration with border longhands and border-image is not serialized to a border shorthand declaration.");
    test(function