diff -r 614762cdc357 -r 5f2c5eb1a820 server/test/unittest_querier.py
--- a/server/test/unittest_querier.py	Wed Oct 09 11:13:56 2013 +0200
+++ b/server/test/unittest_querier.py	Thu Oct 10 13:26:11 2013 +0200
@@ -702,7 +702,7 @@
         rset = self.execute('Any X WHERE X is CWGroup', build_descr=0)
         rset.rows.sort()
         self.assertEqual(tuplify(rset.rows), [(2,), (3,), (4,), (5,)])
-        self.assertEqual(rset.description, ())
+        self.assertEqual(rset.description, [])
 
     def test_select_limit_offset(self):
         rset = self.execute('CWGroup X ORDERBY N LIMIT 2 WHERE X name N')