diff --git a/core/lib/Drupal/Core/Config/FileStorage.php b/core/lib/Drupal/Core/Config/FileStorage.php
index 52c9aa520db47c280911b3c85b9273d9efee3f76..bf178c56194cd77a31d9f9e1a02df8e8fe616d70 100644
--- a/core/lib/Drupal/Core/Config/FileStorage.php
+++ b/core/lib/Drupal/Core/Config/FileStorage.php
@@ -204,14 +204,11 @@ public function listAll($prefix = '') {
       throw new StorageException($this->directory . '/ not found.');
     }
     $extension = '.' . static::getFileExtension();
-    $files = new \GlobIterator(DRUPAL_ROOT . '/' . $this->directory . '/' . $prefix . '*' . $extension);
-
-    $names = array();
-    foreach ($files as $file) {
-      $names[] = $file->getBasename($extension);
-    }
-
-    return $names;
+    $files = glob($this->directory . '/' . $prefix . '*' . $extension);
+    $clean_name = function ($value) use ($extension) {
+      return basename($value, $extension);
+    };
+    return array_map($clean_name, $files);
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Config/InstallStorage.php b/core/lib/Drupal/Core/Config/InstallStorage.php
index 16bcc1c3523f36d160eba8f4e1b2c5d4cb1137b1..e8442ea7a772135f8d51a7038ea47a3eab0c3c4d 100644
--- a/core/lib/Drupal/Core/Config/InstallStorage.php
+++ b/core/lib/Drupal/Core/Config/InstallStorage.php
@@ -134,9 +134,10 @@ public function getComponentNames($type, array $list) {
     foreach ($list as $name) {
       $directory = $this->getComponentFolder($type, $name);
       if (file_exists($directory)) {
-        $files = new \GlobIterator(DRUPAL_ROOT . '/' . $directory . '/*' . $extension);
-        foreach ($files as $file) {
-          $folders[$file->getBasename($extension)] = $directory;
+        $files = glob($directory . '/*' . $extension);
+        foreach ($files as $filename) {
+          $name = basename($filename, $extension);
+          $folders[$name] = $directory;
         }
       }
     }
diff --git a/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/Editor/CKEditor.php b/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/Editor/CKEditor.php
index 3eefd376b7c1108a038babcdcf182ab2d96ccc6f..bc0dc61ac5b0257747c8d0793da35a1f7a50f3f5 100644
--- a/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/Editor/CKEditor.php
+++ b/core/modules/ckeditor/lib/Drupal/ckeditor/Plugin/Editor/CKEditor.php
@@ -320,9 +320,9 @@ public function getLangcodes() {
     if (empty($langcodes)) {
       $langcodes = array();
       // Collect languages included with CKEditor based on file listing.
-      $ckeditor_languages = new \GlobIterator(DRUPAL_ROOT . '/core/assets/vendor/ckeditor/lang/*.js');
-      foreach ($ckeditor_languages as $language_file) {
-        $langcode = $language_file->getBasename('.js');
+      $ckeditor_languages = glob(DRUPAL_ROOT . '/core/assets/vendor/ckeditor/lang/*.js');
+      foreach ($ckeditor_languages as $language_filename) {
+        $langcode = basename($language_filename, '.js');
         $langcodes[$langcode] = $langcode;
       }
       cache('ckeditor.languages')->set('langcodes', $langcodes);