--- a/tox.ini	Wed Mar 16 17:59:10 2016 +0100
+++ b/tox.ini	Wed Mar 16 11:56:32 2016 +0100
@@ -9,6 +9,7 @@
 whitelist_externals =
   /usr/bin/touch
 deps =
+  hg+https://hg.logilab.org/review/yams@default#egg=yams
   py34: -e.
   cubicweb: -r{toxinidir}/cubicweb/test/requirements.txt
   devtools: -r{toxinidir}/cubicweb/devtools/test/requirements.txt