diff --git a/core/modules/locale/lib/Drupal/locale/Tests/LocaleExportTest.php b/core/modules/locale/lib/Drupal/locale/Tests/LocaleExportTest.php
index e962d2c..f6cc32c 100644
--- a/core/modules/locale/lib/Drupal/locale/Tests/LocaleExportTest.php
+++ b/core/modules/locale/lib/Drupal/locale/Tests/LocaleExportTest.php
@@ -169,7 +169,10 @@ function getCustomPoFile() {
   }
 
   /**
-   * Helper function that returns a .po fragment file with an unstranslated string.
+   * Returns a .po file fragment with an untranslated string.
+   *
+   * @return string
+   *   A .po file fragment with an untranslated string.
    */
   function getUntranslatedString() {
     return <<< EOF