diff --git a/ext/date/tests/timezone-configuration.phpt b/ext/date/tests/timezone-configuration.phpt
index efd248977fa..2e6eec79d15 100644
--- a/ext/date/tests/timezone-configuration.phpt
+++ b/ext/date/tests/timezone-configuration.phpt
@@ -5,9 +5,18 @@ date.timezone=GMT
 --FILE--
 <?php
 	putenv('TZ=Europe/Oslo');
+	if (defined('PHP_WINDOWS_VERSION_MAJOR')) {
+		date_default_timezone_set('Europe/Oslo');
+	} else {
+		putenv('TZ=Europe/Oslo');
+	}
 	echo strtotime("2005-06-18 22:15:44"), "\n";
 
-	putenv('TZ=Europe/London');
+	if (defined('PHP_WINDOWS_VERSION_MAJOR')) {
+		date_default_timezone_set('Europe/London');
+	} else {
+		putenv('TZ=Europe/London');
+	}
 	echo strtotime("2005-06-18 22:15:44"), "\n";
 
 	date_default_timezone_set('Europe/Oslo');