diff -r 5b33ca2c61e0 -r 6493c8bf521d hooks/test/unittest_syncschema.py
--- a/hooks/test/unittest_syncschema.py	Tue Jun 23 10:02:41 2015 +0200
+++ b/hooks/test/unittest_syncschema.py	Mon May 18 20:00:06 2015 +0200
@@ -295,6 +295,7 @@
             cnx.execute('SET DEF cardinality "11" '
                          'WHERE DEF relation_type RT, DEF from_entity E,'
                          'RT name "surname", E name "CWUser"')
+            cnx.execute('SET U surname "Doe" WHERE U surname NULL')
             cnx.commit()
             # should not be able anymore to add cwuser without surname
             self.assertRaises(ValidationError, self.create_user, cnx, "toto")