--- a/hooks/notification.py	Tue Dec 01 14:44:55 2015 +0100
+++ b/hooks/notification.py	Tue Dec 01 16:10:18 2015 +0100
@@ -167,7 +167,7 @@
     __abstract__ = True # do not register by default
     __select__ = NotificationHook.__select__ & hook.issued_from_user_query()
     events = ('before_update_entity',)
-    skip_attrs = set()
+    skip_attrs = set(['modification_date'])
 
     def __call__(self):
         cnx = self._cw

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hooks/test/data/hooks.py	Tue Dec 01 16:10:18 2015 +0100
@@ -0,0 +1,8 @@
+from cubicweb.predicates import is_instance
+from cubicweb.hooks import notification
+
+
+class FolderUpdateHook(notification.EntityUpdateHook):
+    __select__ = (notification.EntityUpdateHook.__select__ &
+                  is_instance('Folder'))
+    order = 100  # late trigger so that metadata hooks come before.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hooks/test/unittest_notification.py	Tue Dec 01 16:10:18 2015 +0100
@@ -0,0 +1,39 @@
+# copyright 2015 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
+#
+# This file is part of CubicWeb.
+#
+# CubicWeb is free software: you can redistribute it and/or modify it under the
+# terms of the GNU Lesser General Public License as published by the Free
+# Software Foundation, either version 2.1 of the License, or (at your option)
+# any later version.
+#
+# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Lesser General Public License along
+# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
+"""tests for notification hooks"""
+
+from cubicweb.devtools.testlib import CubicWebTC
+
+
+class NotificationHooksTC(CubicWebTC):
+
+    def test_entity_update(self):
+        """Check transaction_data['changes'] filled by "notifentityupdated" hook.
+        """
+        with self.admin_access.repo_cnx() as cnx:
+            root = cnx.create_entity('Folder', name=u'a')
+            cnx.commit()
+            root.cw_set(name=u'b')
+            self.assertIn('changes', cnx.transaction_data)
+            self.assertEqual(cnx.transaction_data['changes'],
+                             {root.eid: set([('name', u'a', u'b')])})
+
+
+if __name__ == '__main__':
+    from logilab.common.testlib import unittest_main
+    unittest_main()