diff --git a/tox.ini b/tox.ini
index bd82031683..87abf44273 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,7 +5,9 @@ skipdist = True
 
 [testenv]
 usedevelop=True
-passenv=ZUUL_CACHE_DIR
+passenv=
+  ZUUL_CACHE_DIR
+  HOME
 install_command = pip install -U {opts} {packages}
 setenv =
    VIRTUAL_ENV={envdir}