diff --git a/core/modules/views/views_ui/lib/Drupal/views_ui/ViewUI.php b/core/modules/views/views_ui/lib/Drupal/views_ui/ViewUI.php
index dda1c01..d00126f 100644
--- a/core/modules/views/views_ui/lib/Drupal/views_ui/ViewUI.php
+++ b/core/modules/views/views_ui/lib/Drupal/views_ui/ViewUI.php
@@ -740,23 +740,16 @@ public static function getAdminCSS() {
     $themes = list_themes();
     $theme_key = $GLOBALS['theme'];
     while ($theme_key) {
-      // Try to find the admin css file for non-core themes.
-      if (!in_array($theme_key, array('seven', 'bartik'))) {
-        $theme_path = drupal_get_path('theme', $theme_key);
-        // First search in the css directory, then in the root folder of the theme.
-        if (file_exists($theme_path . "/css/views-admin.$theme_key.css")) {
-          $list[$theme_path . "/css/views-admin.$theme_key.css"] = array(
-            'group' => CSS_THEME,
-          );
-        }
-        elseif (file_exists($theme_path . "/views-admin.$theme_key.css")) {
-          $list[$theme_path . "/views-admin.$theme_key.css"] = array(
-            'group' => CSS_THEME,
-          );
-        }
+      // Try to find the admin css file.
+      $theme_path = drupal_get_path('theme', $theme_key);
+      // First search in the css directory, then in the root folder of the theme.
+      if (file_exists($theme_path . "/css/views-admin.$theme_key.css")) {
+        $list[$theme_path . "/css/views-admin.$theme_key.css"] = array(
+          'group' => CSS_THEME,
+        );
       }
-      else {
-        $list[$module_path . "/css/views-admin.$theme_key.css"] = array(
+      elseif (file_exists($theme_path . "/views-admin.$theme_key.css")) {
+        $list[$theme_path . "/views-admin.$theme_key.css"] = array(
           'group' => CSS_THEME,
         );
       }