yword = `"${keyword}"`;
      assert_equals(SetFontFamilyAndSerialize(quoted_keyword), quoted_keyword);
    });
  }, "Serialization of quoted \"<generic-family>\"");

  test(function() {
    kGenericFontFamilyKeywords.forEach(keyword => {
      var prefixed_keyword = `-webkit-${keyword}`;
      assert_equals(SetFontFamilyAndSerialize(prefixed_keyword), prefixed_keyword);
    });
  }, "Serialization of prefixed -webkit-<generic-family>");

  test(function() {
    kNonGenericFontFamilyKeywords.forEach(keyword