diff --git a/ext/intl/tests/dateformat_parse.phpt b/ext/intl/tests/dateformat_parse.phpt
index 67ac42ce6ab..ce800aa48a1 100755
--- a/ext/intl/tests/dateformat_parse.phpt
+++ b/ext/intl/tests/dateformat_parse.phpt
@@ -11,6 +11,7 @@ date.timezone="America/Los_Angeles"
  * Test for the datefmt_parse  function
  */
 
+putenv('TZ=America/Los_Angeles');
 
 function ut_main()
 {