diff --git a/tox.ini b/tox.ini
index b495fd6..cf7013d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,13 +13,7 @@
 [testenv]
 setenv = VIRTUAL_ENV={envdir}
          OS_TEST_PATH=./tempest/tests
-passenv = OS_STDOUT_CAPTURE
-          OS_STDERR_CAPTURE
-          OS_TEST_TIMEOUT
-          OS_TEST_LOCK_PATH
-          OS_TEST_PATH
-          TEMPEST_CONFIG
-          TEMPEST_CONFIG_DIR
+passenv = OS_STDOUT_CAPTURE OS_STDERR_CAPTURE OS_TEST_TIMEOUT OS_TEST_LOCK_PATH OS_TEST_PATH TEMPEST_CONFIG TEMPEST_CONFIG_DIR http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY
 usedevelop = True
 install_command = pip install -U {opts} {packages}
 whitelist_externals = *