diff --git a/tox.ini b/tox.ini
index edcb901..a071d4b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -32,7 +32,6 @@
 
 [testenv:all]
 sitepackages = True
-setenv = VIRTUAL_ENV={envdir}
 commands =
   bash tools/pretty_tox.sh '{posargs}'