diff --git a/core/tests/Drupal/FunctionalJavascriptTests/Ajax/FrameworkTest.php b/core/modules/system/src/Tests/Ajax/FrameworkTest.php
similarity index 99%
rename from core/tests/Drupal/FunctionalJavascriptTests/Ajax/FrameworkTest.php
rename to core/modules/system/src/Tests/Ajax/FrameworkTest.php
index bf68eaa6cf..14bae06442 100644
--- a/core/tests/Drupal/FunctionalJavascriptTests/Ajax/FrameworkTest.php
+++ b/core/modules/system/src/Tests/Ajax/FrameworkTest.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Drupal\FunctionalJavascriptTests\Ajax;
+namespace Drupal\system\Tests\Ajax;
 
 use Drupal\Core\Ajax\AddCssCommand;
 use Drupal\Core\Ajax\AlertCommand;