diff --git a/core/modules/file/file.module b/core/modules/file/file.module
index 9220fe7..ee12a41 100644
--- a/core/modules/file/file.module
+++ b/core/modules/file/file.module
@@ -1192,7 +1192,6 @@ function template_preprocess_file_managed_file(&$variables) {
   if (!empty($element['#attributes']['class'])) {
     $variables['attributes']['class'] = (array) $element['#attributes']['class'];
   }
-  $variables['attributes']['class'][] = 'form-managed-file';
 }
 
 /**
diff --git a/core/modules/file/templates/file-managed-file.html.twig b/core/modules/file/templates/file-managed-file.html.twig
index 9a33ae1..7a87511 100644
--- a/core/modules/file/templates/file-managed-file.html.twig
+++ b/core/modules/file/templates/file-managed-file.html.twig
@@ -12,6 +12,6 @@
  * @ingroup themeable
  */
 #}
-<div{{ attributes }}>
+<div{{ attributes.addClass('form-managed-file') }}>
   {{ element }}
 </div>
diff --git a/core/modules/system/templates/menu-local-task.html.twig b/core/modules/system/templates/menu-local-task.html.twig
index 5939203..2a67339 100644
--- a/core/modules/system/templates/menu-local-task.html.twig
+++ b/core/modules/system/templates/menu-local-task.html.twig
@@ -5,6 +5,7 @@
  *
  * Available variables:
  * - attributes: HTML attributes for the wrapper element.
+ * - active: Whether the task item is an active tab.
  * - link: A rendered link element.
  *
  * Note: This template renders the content for each task item in
diff --git a/core/themes/classy/templates/content-edit/file-managed-file.html.twig b/core/themes/classy/templates/content-edit/file-managed-file.html.twig
index d7b9120..43739be 100644
--- a/core/themes/classy/templates/content-edit/file-managed-file.html.twig
+++ b/core/themes/classy/templates/content-edit/file-managed-file.html.twig
@@ -10,6 +10,6 @@
  * @see template_preprocess_file_managed_file()
  */
 #}
-<div{{ attributes }}>
+<div{{ attributes.addClass('form-managed-file') }}>
   {{ element }}
 </div>