diff --git a/core/modules/update/templates/update-project-status.html.twig b/core/modules/update/templates/update-project-status.html.twig
index 78738aa..eebbd08 100644
--- a/core/modules/update/templates/update-project-status.html.twig
+++ b/core/modules/update/templates/update-project-status.html.twig
@@ -29,9 +29,18 @@
  * @ingroup themeable
  */
 #}
+{%
+  set status_classes = [
+    project.status == constant('UPDATE_NOT_SECURE') ? 'security-error',
+    project.status == constant('UPDATE_REVOKED') ? 'revoked',
+    project.status == constant('UPDATE_NOT_SUPPORTED') ? 'not-supported',
+    project.status == constant('UPDATE_NOT_CURRENT') ? 'not-current',
+    project.status == constant('UPDATE_CURRENT') ? 'current',
+  ]
+%}
 <div class="version-status">
   {%- if status.label -%}
-    <span{{ status.attributes }}>{{ status.label }}</span>
+    <span{{ status.attributes.addClass(status_classes) }}>{{ status.label }}</span>
   {%- else -%}
     {{ status.reason }}
   {%- endif %}
@@ -58,11 +67,18 @@
   </div>
 {% endif %}
 
+{%
+  set extra_attributes = [
+    project.status == constant('UPDATE_NOT_SECURE') ? 'project-not-secure',
+    project.status == constant('UPDATE_REVOKED') ? 'project-revoked',
+    project.status == constant('UPDATE_NOT_SUPPORTED') ? 'project-not-supported',
+  ]
+%}
 <div class="info">
   {% if extras %}
     <div class="extra">
       {% for extra in extras %}
-        <div{{ extra.attributes }}>
+        <div{{ extra.attributes.addClass(extra_attributes) }}>
           {{ extra.label }}: {{ extra.data }}
         </div>
       {% endfor %}
diff --git a/core/modules/update/update.compare.inc b/core/modules/update/update.compare.inc
index da6d63b..86f7244 100644
--- a/core/modules/update/update.compare.inc
+++ b/core/modules/update/update.compare.inc
@@ -238,7 +238,6 @@ function update_calculate_project_update_status(&$project_data, $available) {
           $project_data['extra'] = array();
         }
         $project_data['extra'][] = array(
-          'class' => array('project-not-secure'),
           'label' => t('Project not secure'),
           'data' => t('This project has been labeled insecure by the Drupal security team, and is no longer available for download. Immediately disabling everything included by this project is strongly recommended!'),
         );
@@ -250,7 +249,6 @@ function update_calculate_project_update_status(&$project_data, $available) {
           $project_data['extra'] = array();
         }
         $project_data['extra'][] = array(
-          'class' => array('project-revoked'),
           'label' => t('Project revoked'),
           'data' => t('This project has been revoked, and is no longer available for download. Disabling everything included by this project is strongly recommended!'),
         );
@@ -261,7 +259,6 @@ function update_calculate_project_update_status(&$project_data, $available) {
           $project_data['extra'] = array();
         }
         $project_data['extra'][] = array(
-          'class' => array('project-not-supported'),
           'label' => t('Project not supported'),
           'data' => t('This project is no longer supported, and is no longer available for download. Disabling everything included by this project is strongly recommended!'),
         );
diff --git a/core/modules/update/update.report.inc b/core/modules/update/update.report.inc
index ad396c8..edb4f82 100644
--- a/core/modules/update/update.report.inc
+++ b/core/modules/update/update.report.inc
@@ -246,7 +246,7 @@ function template_preprocess_update_project_status(&$variables) {
   if (!empty($project['extra'])) {
     foreach ($project['extra'] as $value) {
       $extra_item = array();
-      $extra_item['attributes'] = new Attribute(array('class' => $value['class']));
+      $extra_item['attributes'] = new Attribute();
       $extra_item['label'] = $value['label'];
       $extra_item['data'] = drupal_placeholder($value['data']);
       $variables['extras'][] = $extra_item;
@@ -290,32 +290,26 @@ function template_preprocess_update_project_status(&$variables) {
   }
 
   // Set the project status details.
-  $status_attributes = array();
   $status_label = NULL;
   switch ($project['status']) {
     case UPDATE_NOT_SECURE:
-      $status_attributes['class'][] = 'security-error';
       $status_label = t('Security update required!');
       break;
     case UPDATE_REVOKED:
-      $status_attributes['class'][] = 'revoked';
       $status_label = t('Revoked!');
       break;
     case UPDATE_NOT_SUPPORTED:
-      $status_attributes['class'][] = 'not-supported';
       $status_label = t('Not supported!');
       break;
     case UPDATE_NOT_CURRENT:
-      $status_attributes['class'][] = 'not-current';
       $status_label = t('Update available');
       break;
     case UPDATE_CURRENT:
-      $status_attributes['class'][] = 'current';
       $status_label = t('Up to date');
       break;
   }
   $variables['status']['label'] = $status_label;
-  $variables['status']['attributes'] = new Attribute($status_attributes);
+  $variables['status']['attributes'] = new Attribute;
   $variables['status']['reason'] = (isset($project['reason'])) ? $project['reason'] : NULL;
 
   switch ($project['status']) {