diff --git a/tox.ini b/tox.ini
index aa6c7c00..1b6a3337 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,6 +7,7 @@ envlist = py34, lint
 
 [testenv]
 commands = {envpython} setup.py test
+passenv = TRAVIS
 deps =
 
 [testenv:lint]