diff --git a/tox.ini b/tox.ini
index b01de1286..f94dfb492 100644
--- a/tox.ini
+++ b/tox.ini
@@ -8,7 +8,7 @@ deps = -rrequirements.txt
 commands = py.test -n 8 --timeout 60 ./test
 
 [testenv:py35]
-commands = py.test -n 8 --timeout 60 test/netlib test/mitmproxy/script test/pathod/test_utils.py test/pathod/test_log.py test/pathod/test_language_generators.py test/pathod/test_language_writer.py
+commands = py.test -n 8 --timeout 60 test/netlib test/mitmproxy/script test/pathod/test_utils.py test/pathod/test_log.py test/pathod/test_language_generators.py test/pathod/test_language_writer.py test/pathod/test_language_base.py
 
 [testenv:lint]
 deps = flake8