--- a/test/unittest_vregistry.py	Tue Apr 08 17:39:39 2014 +0200
+++ b/test/unittest_vregistry.py	Tue Apr 08 18:00:14 2014 +0200
@@ -74,7 +74,7 @@
 
     def test_properties(self):
         self.vreg.reset()
-        self.assertFalse('system.version.cubicweb' in self.vreg['propertydefs'])
+        self.assertNotIn('system.version.cubicweb', self.vreg['propertydefs'])
         self.assertTrue(self.vreg.property_info('system.version.cubicweb'))
         self.assertRaises(UnknownProperty, self.vreg.property_info, 'a.non.existent.key')