diff --git a/tox.ini b/tox.ini
index ca0cce8d1..25d535e81 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,7 +16,6 @@ deps =
     {env:TOX_EXTRA_REQUIREMENTS}
 passenv =
     JENKINS_*
-    PS1
     OS_*
     TOBIKO_*
     TOX_*