diff --git a/core/modules/filter/css/filter.admin.css b/core/modules/filter/css/filter.admin.css
index f766597..b67a86a 100644
--- a/core/modules/filter/css/filter.admin.css
+++ b/core/modules/filter/css/filter.admin.css
@@ -79,7 +79,3 @@
 [dir="rtl"] .tips {
   padding-right: 0;
 }
-
-.fallback-filter-format-roles-description {
-  font-style: italic;
-}
diff --git a/core/modules/filter/src/FilterFormatListBuilder.php b/core/modules/filter/src/FilterFormatListBuilder.php
index 4844448..f84558e 100644
--- a/core/modules/filter/src/FilterFormatListBuilder.php
+++ b/core/modules/filter/src/FilterFormatListBuilder.php
@@ -105,7 +105,10 @@ public function buildRow(EntityInterface $entity) {
       else {
         $roles_markup = $this->t('This format is shown when no other formats are available');
       }
-      $row['roles']['#wrapper_attributes']['class'][] = 'fallback-filter-format-roles-description';
+      // Emphasize the fallback roles text since it is not a role and is
+      // important to understand when configuring filter formats.
+      $row['roles']['#prefix'] = '<em>';
+      $row['roles']['#suffix'] = '</em>';
     }
     else {
       $roles = array_map('\Drupal\Component\Utility\SafeMarkup::checkPlain', filter_get_roles_by_format($entity));
@@ -141,7 +144,6 @@ public function getDefaultOperations(EntityInterface $entity) {
   public function buildForm(array $form, FormStateInterface $form_state) {
     $form = parent::buildForm($form, $form_state);
     $form['actions']['submit']['#value'] = $this->t('Save changes');
-    $form['#attached']['library'][] = 'filter/drupal.filter.admin';
     return $form;
   }