--- a/tox.ini	Thu Jan 14 18:17:23 2016 +0100
+++ b/tox.ini	Mon Jan 18 09:23:07 2016 +0100
@@ -2,6 +2,7 @@
 envlist = cubicweb,dataimport,devtools,entities,etwist,ext,hooks,server,sobjects,web,wsgi
 
 [testenv]
+usedevelop = True
 sitepackages = True
 deps =
   cubicweb: -r{toxinidir}/cubicweb/test/requirements.txt