diff --git a/tox.ini b/tox.ini
index 8037549..6a4b0cc 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,6 @@
 [tox]
 envlist = {coverage-,}{dj17,dj18,dj19}-{pg,sqlite}
+toxworkdir = {env:TMPDIR:/tmp}/tox-{env:USER}/django-mellon/
 
 [testenv]
 whitelist_externals =