diff --git a/core/lib/Drupal/Core/Session/SessionManager.php b/core/lib/Drupal/Core/Session/SessionManager.php
index a011664..2893e17 100644
--- a/core/lib/Drupal/Core/Session/SessionManager.php
+++ b/core/lib/Drupal/Core/Session/SessionManager.php
@@ -78,7 +78,7 @@ public function initialize() {
     global $user;
 
     if ($this->isCli()) {
-      return;
+      return $this;
     }
 
     // Register the default session handler.