diff --git a/ext/standard/tests/time/bug13142.phpt b/ext/standard/tests/time/bug13142.phpt
index 6e2bf87d319..f021bea6aa1 100644
--- a/ext/standard/tests/time/bug13142.phpt
+++ b/ext/standard/tests/time/bug13142.phpt
@@ -8,6 +8,7 @@ if (!@putenv("TZ=US/Eastern") || getenv("TZ") != 'US/Eastern') {
 ?>
 --FILE--
 <?php
+putenv("TZ=US/Eastern");
 echo date("r\n", strtotime("Sep 04 16:39:45 2001"));
 echo date("r\n", strtotime("Sep 04 2001 16:39:45"));	
 ?>