diff --git a/tox.ini b/tox.ini
index 88bf0caa1b18a625125d67275de52f68333f0f17..86a7ce2a3e4293a0f2b668507c7850acee255ae4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,7 +5,7 @@ envlist = py36
 exclude = venv,.tox,build
 
 [testenv]
-passenv = TEST_OPSDB_HOSTNAME TEST_OPSDB_DBNAME TEST_OPSDB_USERNAME TEST_OPSDB_PASSWORD
+passenv = TEST_OPSDB_HOSTNAME,TEST_OPSDB_DBNAME,TEST_OPSDB_USERNAME,TEST_OPSDB_PASSWORD
 deps =
     coverage
     flake8