diff --git a/tox.ini b/tox.ini
index 8d4ad05..f81fa40 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,12 +4,13 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py27, py34
+envlist = py27, py38
 
 [testenv]
 commands = py.test \
 			test_parser.py \
 			test_parser_ca.py \
-			test_parser_us.py
+			test_parser_us.py \
+			test_parser_gb.py
 deps =
     pytest