Updated Drupal to 8.6. This goes with the following updates because it's possible...

[yaffs-website] / web / core / modules / aggregator / tests / src / Functional / Hal / FeedHalJsonCookieTest.php

<?php

namespace Drupal\Tests\aggregator\Functional\Hal;

use Drupal\Tests\rest\Functional\CookieResourceTestTrait;

/**
 * @group hal
 */
class FeedHalJsonCookieTest extends FeedHalJsonTestBase {

  use CookieResourceTestTrait;

  /**
   * {@inheritdoc}
   */
  protected static $auth = 'cookie';

}