diff --git a/trytond/tests/test_tryton.py b/trytond/tests/test_tryton.py
index e5ffc9bc4b..fb35ab2b8f 100644
--- a/trytond/tests/test_tryton.py
+++ b/trytond/tests/test_tryton.py
@@ -38,6 +38,7 @@ if __name__ == '__main__':
 from trytond.config import CONFIG
 CONFIG['db_type'] = 'sqlite'
 CONFIG.update_etc(_CONFIGFILE)
+CONFIG.set_timezone()
 if not CONFIG['admin_passwd']:
     CONFIG['admin_passwd'] = 'admin'