--- a/server/test/unittest_undo.py	Fri Jun 14 13:43:29 2013 +0200
+++ b/server/test/unittest_undo.py	Thu Jun 13 15:12:06 2013 +0200
@@ -20,7 +20,7 @@
 from cubicweb import ValidationError
 from cubicweb.devtools.testlib import CubicWebTC
 import cubicweb.server.session
-from cubicweb.server.session import Transaction as OldTransaction
+from cubicweb.server.session import Connection as OldConnection
 from cubicweb.transaction import *
 
 from cubicweb.server.sources.native import UndoTransactionException, _UndoException
@@ -35,14 +35,14 @@
         self.txuuid = self.commit()
 
     def setUp(self):
-        class Transaction(OldTransaction):
+        class Connection(OldConnection):
             """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
+        cubicweb.server.session.Connection = Connection
         super(UndoableTransactionTC, self).setUp()
 
     def tearDown(self):
-        cubicweb.server.session.Transaction = OldTransaction
+        cubicweb.server.session.Connection = OldConnection
         self.restore_connection()
         self.session.undo_support = set()
         super(UndoableTransactionTC, self).tearDown()