test: skip unsupported test for python 3.8

tests/views/test_settings.py

@@ -1,5 +1,6 @@
 # -*- coding: utf-8; -*-
 
+import sys
 from unittest.mock import patch
 
 import colander
@@ -57,6 +58,8 @@ class TestAppInfoView(WebTestCase):
         # invalid
         with patch.object(self.request, "GET", new={"tzname": "bad_name"}):
             result = view.configure_check_timezone()
+            # nb. this check won't work for python 3.8
+            if sys.version_info >= (3, 9):
                 self.assertEqual(
                     result["invalid"], "'No time zone found with key bad_name'"
                 )