string changed to timezoned object

smash/web/tests/view/test_appointments.py

@@ -159,7 +159,7 @@ class AppointmentsViewTests(LoggedInTestCase):
     def test_save_appointments_edit_with_valid_nd_number(self):
         subject = create_study_subject()
         visit = create_visit(subject)
-        visit.datetime_begin = "2011-01-01"
+        visit.datetime_begin = timezone.now().replace(year=2011)
         visit.save()
         appointment = create_appointment(visit, get_today_midnight_date())