diff --git a/tox.ini b/tox.ini
index 6a4cb78c5d..4ccf487655 100644
--- a/tox.ini
+++ b/tox.ini
@@ -108,7 +108,7 @@ commands =
 # Provide an environment for system packagers that dont want anything from pip
 # Any extra deps needed for this env can be passed by setting TOX_EXTRA_DEPS
 sitepackages = True
-passenv = TOX_EXTRA_DEPS
+passenv = TOX_EXTRA_DEPS http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY
 # Sets deps to an empty list so nothing is installed from pip
 deps =
 commands =