Refs #27025 -- Fixed a timezone test for Python 3.6.

Reflects behavior changes in PEP 495 (Local Time Disambiguation).

tests/utils_tests/test_timezone.py

@@ -193,8 +193,14 @@ class TimezoneTests(SimpleTestCase):
                 pytz.timezone("Asia/Bangkok").localize(datetime.datetime(2011, 9, 1, 17, 20, 30)), CET
             ),
             datetime.datetime(2011, 9, 1, 12, 20, 30))
-        with self.assertRaises(ValueError):
-            timezone.make_naive(datetime.datetime(2011, 9, 1, 12, 20, 30), CET)
+        if PY36:
+            self.assertEqual(
+                timezone.make_naive(datetime.datetime(2011, 9, 1, 12, 20, 30), CET),
+                datetime.datetime(2011, 9, 1, 19, 20, 30)
+            )
+        else:
+            with self.assertRaises(ValueError):
+                timezone.make_naive(datetime.datetime(2011, 9, 1, 12, 20, 30), CET)
 
     @requires_pytz
     def test_make_aware_pytz_ambiguous(self):