diff --git a/core/lib/Drupal/Core/Test/FunctionalTestSetupTrait.php b/core/lib/Drupal/Core/Test/FunctionalTestSetupTrait.php
index e59b66a4dd..9f255ea375 100644
--- a/core/lib/Drupal/Core/Test/FunctionalTestSetupTrait.php
+++ b/core/lib/Drupal/Core/Test/FunctionalTestSetupTrait.php
@@ -496,9 +496,6 @@ protected function rebuildAll() {
     // @todo Test-specific setUp() methods may set up further fixtures; find a
     //   way to execute this after setUp() is done, or to eliminate it entirely.
     $this->resetAll();
-
-    // Explicitly call register() again on the container registered in \Drupal.
-    $this->container->get('stream_wrapper_manager')->register();
   }
 
   /**