diff --git a/ext/date/tests/date_sunrise_and_sunset_basic.phpt b/ext/date/tests/date_sunrise_and_sunset_basic.phpt
index 9f294b75111..a96fa830349 100644
--- a/ext/date/tests/date_sunrise_and_sunset_basic.phpt
+++ b/ext/date/tests/date_sunrise_and_sunset_basic.phpt
@@ -3,6 +3,8 @@ Basic test for date_sunrise and date_sunset based on example in PHP manual
 --FILE--
 <?php
 
+date_default_timezone_set('UTC');
+
 /* calculate the sunrise time for Lisbon, Portugal
 Latitude: 38.4 North
 Longitude: 9 West