diff --git a/tox.ini b/tox.ini
index c77ce07..2c823c9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,7 +9,7 @@ deps =
   -r{toxinidir}/test-requirements.txt
 commands =
   bash -c "TESTS_DIR=./proliantutils/tests/ python setup.py testr --slowest --testr-args='{posargs}'"
-#setenv = PYTHONDONTWRITEBYTECODE=1
+whitelist_externals = bash
 
 [testenv:pep8]
 basepython = python2.7