diff --git a/core/modules/filter/filter.module b/core/modules/filter/filter.module
index 145691a..d31cca1 100644
--- a/core/modules/filter/filter.module
+++ b/core/modules/filter/filter.module
@@ -749,10 +749,10 @@ function template_preprocess_filter_guidelines(&$variables) {
  *   - attributes: An associative array containing properties of the element.
  */
 function template_preprocess_text_format_wrapper(&$variables) {
-  $variables['description_class'] = FALSE;
+  $variables['aria_description'] = FALSE;
   // Add element class and id for screen readers.
   if (isset($variables['attributes']['aria-describedby'])) {
-    $variables['description_class'] = TRUE;
+    $variables['aria_description'] = TRUE;
     $variables['attributes']['id'] = $variables['attributes']['aria-describedby'];
     // Remove aria-describedby attribute as it shouldn't be visible here.
     unset($variables['attributes']['aria-describedby']);
diff --git a/core/modules/filter/templates/text-format-wrapper.html.twig b/core/modules/filter/templates/text-format-wrapper.html.twig
index 607c38f..4e5ff6d 100644
--- a/core/modules/filter/templates/text-format-wrapper.html.twig
+++ b/core/modules/filter/templates/text-format-wrapper.html.twig
@@ -7,8 +7,8 @@
  * - children: Text format element children.
  * - description: Text format element description.
  * - attributes: HTML attributes for the containing element.
- * - description_class: Flag for whether or not to add a class to the
- *   description container.
+ * - aria_description: Flag for whether or not an ARIA description has been
+ *   added to the description container.
  *
  * @see template_preprocess_text_format_wrapper()
  *
@@ -20,7 +20,7 @@
   {% if description %}
     {%
       set classes = [
-        description_class ? 'description',
+        aria_description ? 'description',
       ]
     %}
     <div{{ attributes.addClass(classes) }}>{{ description }}</div>