Fixed #27327 -- Simplified time zone handling by requiring pytz.

tests/db_functions/test_datetime.py

@@ -1,7 +1,8 @@
 from __future__ import unicode_literals
 
 from datetime import datetime
-from unittest import skipIf
+
+import pytz
 
 from django.conf import settings
 from django.db import connection
@@ -16,11 +17,6 @@ from django.utils import timezone
 
 from .models import DTModel
 
-try:
-    import pytz
-except ImportError:
-    pytz = None
-
 
 def microsecond_support(value):
     return value if connection.features.supports_microsecond_precision else value.replace(microsecond=0)
@@ -659,7 +655,6 @@ class DateFunctionTests(TestCase):
             list(DTModel.objects.annotate(truncated=TruncSecond('start_date', output_field=DateField())))
 
 
-@skipIf(pytz is None, "this test requires pytz")
 @override_settings(USE_TZ=True, TIME_ZONE='UTC')
 class DateFunctionWithTimeZoneTests(DateFunctionTests):