diff -u b/core/modules/system/system.install b/core/modules/system/system.install
--- b/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -443,7 +443,7 @@
       $requirements['cron']['description'][] = ['#markup' => t('Cron has not run recently.')];
       $requirements['cron']['description'][] = [
         '#prefix' => ' ',
-        '#markup' => t('For more information, see the online handbook entry for <a href="@cron-handbook">configuring cron jobs</a>.'),
+        '#markup' => t('For more information, see the online handbook entry for <a href="@cron-handbook">configuring cron jobs</a>.', ['@cron-handbook' => 'https://www.drupal.org/cron']),
         '#suffix' => ' ',
       ];
     }