Fix passenv tox setting

Author: adamalton

tox.ini

@@ -19,7 +19,7 @@ deps =
     42: django >= 4.2.23, <5.0
     50: django >= 5.0, <5.3
 extras = test
-passenv = CI TRAVIS TRAVIS_*
+passenv = CI,TRAVIS,TRAVIS_*
 setenv = DJANGO_SETTINGS_MODULE = cspreports.tests.settings
 commands =
     coverage run --branch --source=cspreports setup.py test