diff --git a/trytond/tests/test_tryton.py b/trytond/tests/test_tryton.py
index 71bf65b921..576ed9ecab 100644
--- a/trytond/tests/test_tryton.py
+++ b/trytond/tests/test_tryton.py
@@ -211,6 +211,9 @@ def test_depends():
                 assert encoder.fields <= depends, (
                     'Missing depends %s in "%s"."%s"' % (
                         list(encoder.fields - depends), mname, fname))
+                assert depends <= set(model._fields), (
+                    'Unknown depends %s in "%s"."%s"' % (
+                        list(depends - set(model._fields)), mname, fname))
 
 
 def suite():