diff --git a/configure.ac b/configure.ac
index b2ae6189ad9557c2e5edf24815b97220fc4b0173..80f6156146c469517185b80d7b82fb4ef2a77e51 100644
--- a/configure.ac
+++ b/configure.ac
@@ -758,6 +758,7 @@ AC_PYTHON_MODULE(pycurl, t)
 AC_PYTHON_MODULE(bitarray, t)
 AC_PYTHON_MODULE(ipaddr, t)
 AC_PYTHON_MODULE(yaml, t)
+AC_PYTHON_MODULE(mock)
 AC_PYTHON_MODULE(affinity)
 AC_PYTHON_MODULE(paramiko)
 
diff --git a/devel/build_chroot b/devel/build_chroot
index 43ca4d38fc4f62418f87ae028dec119d8e10af0f..d14f59e232209946e27f08681c0668db2e3106fe 100755
--- a/devel/build_chroot
+++ b/devel/build_chroot
@@ -90,7 +90,8 @@ in_chroot -- \
   $APT_INSTALL lvm2 ssh bridge-utils iproute iputils-arping \
                ndisc6 python python-pyopenssl openssl \
                python-pyparsing python-simplejson \
-               python-pyinotify python-pycurl python-yaml socat fping
+               python-pyinotify python-pycurl python-yaml python-mock \
+               socat fping
 
 in_chroot -- \
   $APT_INSTALL python-paramiko qemu-utils
diff --git a/doc/devnotes.rst b/doc/devnotes.rst
index d6cfc2c46b9a64d88a0f61cc56c08d1eb7114cfe..82bad0907d05593514273c4902cc6f296516e0d1 100644
--- a/doc/devnotes.rst
+++ b/doc/devnotes.rst
@@ -16,6 +16,7 @@ Most dependencies from :doc:`install-quick`, including ``qemu-img``
 - `python-epydoc <http://epydoc.sourceforge.net/>`_
 - `python-sphinx <http://sphinx.pocoo.org/>`_
   (tested with version 1.1.3)
+- `python-mock <http://www.voidspace.org.uk/python/mock/>`_
 - `graphviz <http://www.graphviz.org/>`_
 - the `en_US.UTF-8` locale must be enabled on the system
 - `pylint <http://www.logilab.org/857>`_ and its associated
@@ -47,7 +48,7 @@ Installation of all dependencies listed here::
 
      $ apt-get install python-setuptools automake git fakeroot
      $ apt-get install pandoc python-epydoc graphviz
-     $ apt-get install python-yaml
+     $ apt-get install python-yaml python-mock
      $ cd / && sudo easy_install \
                sphinx \
                logilab-astng==0.23.1 \