use Drupal\Component\Serialization\Json;
use Drupal\Core\Url;
-use Drupal\system\Tests\Cache\AssertPageCacheContextsAndTagsTrait;
use Drupal\Tests\BrowserTestBase;
+use Drupal\Tests\system\Functional\Cache\AssertPageCacheContextsAndTagsTrait;
use GuzzleHttp\Cookie\CookieJar;
/**