diff --git a/tox.ini b/tox.ini
index b9b9d6abcd..1de3558012 100644
--- a/tox.ini
+++ b/tox.ini
@@ -8,7 +8,7 @@ ignore_basepython_conflict=true
 usedevelop = True
 basepython = python3
 setenv = VIRTUAL_ENV={envdir}
-         PYTHONDONTWRITEBYTECODE = 1
+         PYTHONDONTWRITEBYTECODE=1
          LANGUAGE=en_US
          LC_ALL=en_US.UTF-8
          PYTHONWARNINGS=default::DeprecationWarning
@@ -18,7 +18,12 @@ deps =
   -r{toxinidir}/test-requirements.txt
 commands =
     stestr run --slowest {posargs}
-passenv = http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY
+passenv = http_proxy
+          HTTP_PROXY
+          https_proxy
+          HTTPS_PROXY
+          no_proxy
+          NO_PROXY
 
 [testenv:unit-with-driver-libs]
 deps = {[testenv]deps}