diff -u b/core/modules/user/src/Plugin/views/argument_default/CurrentUser.php b/core/modules/user/src/Plugin/views/argument_default/CurrentUser.php
--- b/core/modules/user/src/Plugin/views/argument_default/CurrentUser.php
+++ b/core/modules/user/src/Plugin/views/argument_default/CurrentUser.php
@@ -39,9 +39,12 @@
    * @param \Drupal\Core\Session\AccountProxyInterface $currentUser
    *   The current user.
    */
-  public function __construct(array $configuration, $plugin_id, $plugin_definition, AccountProxyInterface $currentUser) {
+  public function __construct(array $configuration, $plugin_id, $plugin_definition, AccountProxyInterface $currentUser = NULL) {
     parent::__construct($configuration, $plugin_id, $plugin_definition);
-    $this->currentUser = $currentUser;
+    if (is_null($currentUser)) {
+      @trigger_error('Calling' . __CLASS__ . '::__construct() without the $currentUser argument is deprecated in drupal:10.1.0 and is removed in drupal:11.0.0. See https://www.drupal.org/node/TBD', E_USER_DEPRECATED);
+      $this->currentUser = $currentUser;
+    }
   }
 
   /**