use Drupal\simpletest\WebTestBase;
+@trigger_error('\Drupal\tour\Tests\TourTestBase is deprecated in 8.4.0 and will be removed before Drupal 9.0.0. Instead, use \Drupal\Tests\tour\Functional\TourTestBase.', E_USER_DEPRECATED);
+
/**
* Base class for testing Tour functionality.
+ *
+ * @deprecated in Drupal 8.4.0 and will be removed before Drupal 9.0.0.
+ * Use \Drupal\Tests\tour\Functional\TourTestBase instead.
*/
abstract class TourTestBase extends WebTestBase {