diff --git a/core/modules/basic_auth/src/Tests/BasicAuthTestTrait.php b/core/modules/basic_auth/src/Tests/BasicAuthTestTrait.php
index c21547a..78056c9 100644
--- a/core/modules/basic_auth/src/Tests/BasicAuthTestTrait.php
+++ b/core/modules/basic_auth/src/Tests/BasicAuthTestTrait.php
@@ -2,6 +2,8 @@
 
 namespace Drupal\basic_auth\Tests;
 
+@trigger_error(__FILE__ . ' is deprecated in Drupal 8.4.0 and will be removed before Drupal 9.0.0. Use \Drupal\Tests\basic_auth\Traits\BasicAuthTestTrait instead. See https://www.drupal.org/node/2862800.', E_USER_DEPRECATED);
+
 /**
  * Provides common functionality for Basic Authentication test classes.
  *
@@ -10,7 +12,6 @@
  *
  * @see https://www.drupal.org/node/2862800
  */
-@trigger_error(__FILE__ . ' is deprecated in Drupal 8.4.0 and will be removed before Drupal 9.0.0. Use \Drupal\Tests\basic_auth\Traits\BasicAuthTestTrait instead. See https://www.drupal.org/node/2862800.', E_USER_DEPRECATED);
 trait BasicAuthTestTrait {
 
   /**