diff -r 79bbc5045288 -r 3a590ff82e99 server/test/unittest_repository.py
--- a/server/test/unittest_repository.py	Fri Jul 31 12:04:32 2009 +0200
+++ b/server/test/unittest_repository.py	Fri Jul 31 14:18:53 2009 +0200
@@ -324,6 +324,10 @@
         self.assertRaises(BadConnectionId, repo.set_shared_data, cnxid, 'data', 0)
         self.assertRaises(BadConnectionId, repo.get_shared_data, cnxid, 'data')
 
+    def test_schema_is_relation(self):
+        no_is_rset = self.execute('Any X WHERE NOT X is ET')
+        self.failIf(no_is_rset, no_is_rset.description)
+
 
 class DataHelpersTC(RepositoryBasedTC):