diff --git a/tox.ini b/tox.ini
index 66f39c230..5a2abeb2e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,7 +5,7 @@ envlist = py34,py27,pep8,bandit
 setenv =
     VIRTUAL_ENV={envdir}
     OS_TEST_TIMEOUT=30
-passend = OS_*
+passenv = OS_*
 deps = -r{toxinidir}/test-requirements.txt
 commands = python setup.py testr --slowest --testr-args='{posargs}'