--- a/devtools/testlib.py	Tue Jun 10 16:01:49 2014 +0200
+++ b/devtools/testlib.py	Fri Jun 13 15:42:04 2014 +0200
@@ -331,7 +331,7 @@
             self._pop_custom_cnx()
         else:
             self._cnxs.add(cnx) # register the cnx to make sure it is removed
-            self._current_session = cnx._session
+            self._current_session = cnx.session
             self._current_clt_cnx = cnx
 
     @property