diff -r 1b7b4709c0cf -r 52af67a2f0a5 web/test/unittest_views_basecontrollers.py
--- a/web/test/unittest_views_basecontrollers.py	Wed Mar 27 11:42:13 2013 +0100
+++ b/web/test/unittest_views_basecontrollers.py	Wed Mar 27 17:09:55 2013 +0100
@@ -32,6 +32,8 @@
 from cubicweb.utils import json_dumps
 from cubicweb.uilib import rql_for_eid
 from cubicweb.web import INTERNAL_FIELD_VALUE, Redirect, RequestError, RemoteCallFailed
+import cubicweb.server.session
+from cubicweb.server.session import Transaction as OldTransaction
 from cubicweb.entities.authobjs import CWUser
 from cubicweb.web.views.autoform import get_pending_inserts, get_pending_deletes
 from cubicweb.web.views.basecontrollers import JSonController, xhtmlize, jsonize
@@ -781,9 +783,20 @@
 
 class UndoControllerTC(CubicWebTC):
 
+    def setUp(self):
+        class Transaction(OldTransaction):
+            """Force undo feature to be turned on in all case"""
+            undo_actions = property(lambda tx: True, lambda x, y:None)
+        cubicweb.server.session.Transaction = Transaction
+        super(UndoControllerTC, self).setUp()
+
+    def tearDown(self):
+        super(UndoControllerTC, self).tearDown()
+        cubicweb.server.session.Transaction = OldTransaction
+
+
     def setup_database(self):
         req = self.request()
-        self.session.undo_actions = True
         self.toto = self.create_user(req, 'toto', password='toto', groups=('users',),
                                      commit=False)
         self.txuuid_toto = self.commit()