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
@@ -439,22 +439,25 @@
       'value' => $summary,
     );
     if ($severity != REQUIREMENT_INFO) {
-      $requirements['cron']['description'][] = ['#markup' => t('Cron has not run recently.'), '#weight' => 0];
       $requirements['cron']['description'][] = [
-        '#prefix' => ' ',
-        '#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' => ' ',
-        '#weight' => 1,
+        [
+          '#markup' => t('Cron has not run recently.'),
+          '#suffix' => ' ',
+        ],
+        [
+          '#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' => ' ',
+        ],
       ];
     }
     $requirements['cron']['description'][] = [
-      '#markup' => t('You can <a href="@cron">run cron manually</a>.', ['@cron' => \Drupal::url('system.run_cron')]),
-      '#weight' => 2,
-    ];
-    $requirements['cron']['description'][] = [
-      '#prefix' => '<br />',
-      '#markup' => t('To run cron from outside the site, go to <a href="@cron">@cron</a>', ['@cron' => \Drupal::url('system.cron', ['key' => \Drupal::state()->get('system.cron_key'), ['absolute' => TRUE]])]),
-      '#weight' => 3,
+      [
+        '#markup' => t('You can <a href="@cron">run cron manually</a>.', ['@cron' => \Drupal::url('system.run_cron')]),
+      ],
+      [
+        '#prefix' => '<br />',
+        '#markup' => t('To run cron from outside the site, go to <a href="@cron">@cron</a>', ['@cron' => \Drupal::url('system.cron', ['key' => \Drupal::state()->get('system.cron_key'), ['absolute' => TRUE]])]),
+      ],
     ];
   }
   if ($phase != 'install') {