diff --git a/tox.ini b/tox.ini
index f4fa0b08..609ab751 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,7 +5,7 @@ envlist = py26,py27,py33,py34,pypy
 
 [testenv]
 deps = -rrequirements-dev.txt
-passenv = HOME HOMEPATH LANG TERM
+passenv = HOME HOMEPATH TERM
 commands =
     coverage erase
     coverage run -m pytest {posargs:tests}