diff --git a/tox.ini b/tox.ini
index 688c837a4..f6fd3f783 100644
--- a/tox.ini
+++ b/tox.ini
@@ -29,7 +29,7 @@ commands = python setup.py testr --slowest --testr-args='--concurrency=1 {posarg
 setenv =
    {[testenv]setenv}
    OS_TEST_PATH = ./shade/tests/functional
-passenv = {OS_* SHADE_* UPPER_CONSTRAINTS_FILE
+passenv = OS_* SHADE_* UPPER_CONSTRAINTS_FILE
 whitelist_externals = bash
 commands =
    bash -x {toxinidir}/extras/install-tips.sh