diff --git a/core/modules/system/lib/Drupal/system/Tests/Common/FormatDateTest.php b/core/modules/system/lib/Drupal/system/Tests/Common/FormatDateTest.php
index cc3d4e8..7278a3d 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Common/FormatDateTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Common/FormatDateTest.php
@@ -89,6 +89,7 @@ function testAdminDefinedFormatDate() {
    */
   function testFormatDate() {
     global $user;
+    $this->resetAll();
 
     $language_interface = language(Language::TYPE_INTERFACE);