diff --git a/tox.ini b/tox.ini
index dcb420c..f698536 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,6 +13,7 @@ deps =
 commands =
     /usr/bin/find . -type f -name "*.pyc" -delete
 passenv =
+    COMMON_TESTS_PATH
     HOME
     http_proxy
     HTTP_PROXY
@@ -20,6 +21,9 @@ passenv =
     HTTPS_PROXY
     no_proxy
     NO_PROXY
+    TESTING_BRANCH
+    TESTING_HOME
+    USER
 whitelist_externals =
     bash
 setenv =