diff -u b/core/modules/views_ui/src/Form/Ajax/ViewsFormBase.php b/core/modules/views_ui/src/Form/Ajax/ViewsFormBase.php
--- b/core/modules/views_ui/src/Form/Ajax/ViewsFormBase.php
+++ b/core/modules/views_ui/src/Form/Ajax/ViewsFormBase.php
@@ -216,9 +216,6 @@
 
     // These forms have the title built in, so set the title here:
     $title = $form_state->get('title') ?: '';
-    if (!$ajax && $title) {
-      $form['#attached']['css'][] = drupal_get_path('module', 'views_ui') . '/css/views_ui.admin.css';
-    }
 
     if ($ajax && (!$form_state->isExecuted() || $form_state->get('rerender'))) {
       // If the form didn't execute and we're using ajax, build up an