diff --git a/core/lib/Drupal/Core/Cache/Context/PagersCacheContext.php b/core/lib/Drupal/Core/Cache/Context/PagersCacheContext.php
index 74f10bb5c3..47221c654e 100644
--- a/core/lib/Drupal/Core/Cache/Context/PagersCacheContext.php
+++ b/core/lib/Drupal/Core/Cache/Context/PagersCacheContext.php
@@ -27,7 +27,11 @@ class PagersCacheContext implements CalculatedCacheContextInterface {
    * @param \Drupal\Core\Pager\PagerParametersInterface $pager_params
    *   The pager parameters.
    */
-  public function __construct(PagerParametersInterface $pager_params) {
+  public function __construct(PagerParametersInterface $pager_params = NULL) {
+    if (!$pager_params) {
+      @trigger_error('Calling ' . __METHOD__ . ' without the $pager_params argument is deprecated in drupal:8.8.0 and is required in drupal:9.0.0. See https://www.drupal.org/node/2779457', E_USER_DEPRECATED);
+      $pager_params = \Drupal::service('pager.parameters');
+    }
     $this->pagerParams = $pager_params;
   }
 
diff --git a/core/lib/Drupal/Core/Pager/PagerManager.php b/core/lib/Drupal/Core/Pager/PagerManager.php
index 0acbc885f6..eea7e5867a 100644
--- a/core/lib/Drupal/Core/Pager/PagerManager.php
+++ b/core/lib/Drupal/Core/Pager/PagerManager.php
@@ -110,11 +110,6 @@ protected function setPager(Pager $pager, $element = 0) {
 
   /**
    * Initialize global variables for backwards compatibility.
-   *
-   * @todo Pager global variables are deprecated and will be removed before
-   * Drupal 9.0.0.
-   *
-   * @see https://www.drupal.org/node/2779457
    */
   protected function initializeGlobals() {
     if (empty($GLOBALS['pager_page_array'])) {
@@ -123,12 +118,7 @@ protected function initializeGlobals() {
   }
 
   /**
-   * Updates global variables with a pager data.
-   *
-   * @todo Pager global variables are deprecated and will be removed before
-   * Drupal 9.0.0.
-   *
-   * @see https://www.drupal.org/node/2779457
+   * Updates global variables with a pager data for backwards compatibility.
    */
   protected function updateGlobals() {
     $pager_total_items = [];