ait next_message();
  assert_true(msg1.ok, 'Message passing');

  worker.port.postMessage({type: 'echo_cookies_http'});
  const msg2 = await next_message();
  assert_true(msg2.ok, 'Get cookies');
  assert_false(
      msg2.cookies.includes('__Host-partitioned'),
      'Cannot access partitioned cookie via HTTP');
  assert_true(
      msg2.cookies.includes('unpartitioned'),
      'Can access unpartitioned cookie via HTTP');

  worker.port.postMessage({type: 'echo_cookies_import'});
  const msg3 = await next_