ad('revert'));
  }, 'Loading CSS-wide keyword "revert" causes SyntaxError (document)')

  promise_test(test => {
    return promise_rejects_dom(test, 'SyntaxError', load_on_worker('initial'));
  }, 'Loading CSS-wide keyword "initial" causes SyntaxError (worker)')

  promise_test(test => {
    return promise_rejects_dom(test, 'SyntaxError', load_on_worker('inherit'));
  }, 'Loading CSS-wide keyword "inherit" causes SyntaxError (worker)')

  promise_test(test => {
    return promise_rejects_dom(test, 'SyntaxE