diff --git a/core/modules/system/lib/Drupal/system/Controller/SystemInfoController.php b/core/modules/system/lib/Drupal/system/Controller/SystemInfoController.php
index 0c7f4c1..0f7cba1 100644
--- a/core/modules/system/lib/Drupal/system/Controller/SystemInfoController.php
+++ b/core/modules/system/lib/Drupal/system/Controller/SystemInfoController.php
@@ -51,8 +51,8 @@ public function __construct(SystemManager $systemManager) {
    *   The current status of the Drupal installation.
    */
   public function status() {
-    $requirements = $this->systemManager->list_requirements();
-    $this->systemManager->fix_anonymous_uid();
+    $requirements = $this->systemManager->listRequirements();
+    $this->systemManager->fixAnonymousUid();
     return theme('status_report', array('requirements' => $requirements));
   }
 
diff --git a/core/modules/system/lib/Drupal/system/SystemManager.php b/core/modules/system/lib/Drupal/system/SystemManager.php
index cdb46e8..c6b9572 100644
--- a/core/modules/system/lib/Drupal/system/SystemManager.php
+++ b/core/modules/system/lib/Drupal/system/SystemManager.php
@@ -43,9 +43,9 @@ public function __construct(ModuleHandlerInterface $module_handler, Connection $
    * @return boolean
    *   Returns the status of the system.
    */
-  public function check_requirements() {
-    $requirements = $this->list_requirements();
-    return drupal_requirements_severity($requirements) == REQUIREMENT_ERROR;
+  public function checkRequirements() {
+    $requirements = $this->listRequirements();
+    return $this->getMaxSeverity($requirements) == REQUIREMENT_ERROR;
   }
 
   /**
@@ -54,7 +54,7 @@ public function check_requirements() {
    * @return array
    *   An array of system requirements.
    */
-  public function list_requirements() {
+  public function listRequirements() {
     // Load .install files
     include_once DRUPAL_ROOT . '/core/includes/install.inc';
     drupal_load_updates();
@@ -78,7 +78,7 @@ public function list_requirements() {
    * MySQL import might have set the uid of the anonymous user to autoincrement
    * value. Let's try fixing it. See http://drupal.org/node/204411
    */
-  public function fix_anonymous_uid() {
+  public function fixAnonymousUid() {
     $this->database->update('users')
       ->expression('uid', 'uid - uid')
       ->condition('name', '')
@@ -87,4 +87,24 @@ public function fix_anonymous_uid() {
       ->execute();
   }
 
+  /**
+   * Extracts the highest severity from the requirements array.
+   *
+   * @param $requirements
+   *   An array of requirements, in the same format as is returned by
+   *   hook_requirements().
+   *
+   * @return
+   *   The highest severity in the array.
+   */
+  public function getMaxSeverity(&$requirements) {
+    $severity = REQUIREMENT_OK;
+    foreach ($requirements as $requirement) {
+      if (isset($requirement['severity'])) {
+        $severity = max($severity, $requirement['severity']);
+      }
+    }
+    return $severity;
+  }
+
 }
diff --git a/core/modules/system/system.admin.inc b/core/modules/system/system.admin.inc
index e889dc4..9459998 100644
--- a/core/modules/system/system.admin.inc
+++ b/core/modules/system/system.admin.inc
@@ -20,7 +20,7 @@
 function system_admin_config_page() {
   // Check for status report errors.
   // @todo Use depedancy injection in http://drupal.org/node/1987810.
-  if (Drupal::service('system.manager')->check_requirements() && user_access('administer site configuration')) {
+  if (Drupal::service('system.manager')->checkRequirements() && user_access('administer site configuration')) {
     drupal_set_message(t('One or more problems were detected with your Drupal installation. Check the <a href="@status">status report</a> for more information.', array('@status' => url('admin/reports/status'))), 'error');
   }
   $blocks = array();