diff -u b/core/modules/locale/lib/Drupal/locale/Tests/LocaleFileImportStatus.php b/core/modules/locale/lib/Drupal/locale/Tests/LocaleFileImportStatus.php
--- b/core/modules/locale/lib/Drupal/locale/Tests/LocaleFileImportStatus.php
+++ b/core/modules/locale/lib/Drupal/locale/Tests/LocaleFileImportStatus.php
@@ -183,6 +183,7 @@
    */
   function testDeleteLanguage() {
     $dir = conf_path() . '/files/translations';
+    file_prepare_directory($dir, FILE_CREATE_DIRECTORY);
     variable_set('locale_translate_file_directory', $dir);
     $langcode = 'de';
     $this->addLanguage($langcode);
diff -u b/core/modules/locale/lib/Drupal/locale/TranslationsStream.php b/core/modules/locale/lib/Drupal/locale/TranslationsStream.php
--- b/core/modules/locale/lib/Drupal/locale/TranslationsStream.php
+++ b/core/modules/locale/lib/Drupal/locale/TranslationsStream.php
@@ -20,7 +20,7 @@
    * Implements Drupal\Core\StreamWrapper\LocalStream::getDirectoryPath()
    */
   public function getDirectoryPath() {
-    return variable_get('locale_translate_file_directory', 
+    return variable_get('locale_translate_file_directory',
       conf_path() . '/files/translations');
   }