diff --git a/tox.ini b/tox.ini
index fe42bb1..861074c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,6 +18,10 @@ deps =
     pytest-cov
 ignore_outcome =
     djangotrunk: True
+passenv =
+  CI
+  TRAVIS
+  TRAVIS_*
 
 commands =
     pip install -e .