diff --git a/odoo/addons/test_new_api/tests/test_new_fields.py b/odoo/addons/test_new_api/tests/test_new_fields.py
index 21d24d42724..20827674977 100644
--- a/odoo/addons/test_new_api/tests/test_new_fields.py
+++ b/odoo/addons/test_new_api/tests/test_new_fields.py
@@ -741,30 +741,6 @@ class TestFields(common.TransactionCase):
         self.assertEqual(len(discussion.important_messages), 2)
         self.assertEqual(len(discussion.very_important_messages), 2)
 
-    def test_70_x2many_write(self):
-        discussion = self.env.ref('test_new_api.discussion_0')
-        Message = self.env['test_new_api.message']
-        # There must be 3 messages, 0 important
-        self.assertEqual(len(discussion.messages), 3)
-        self.assertEqual(len(discussion.important_messages), 0)
-        self.assertEqual(len(discussion.very_important_messages), 0)
-        discussion.important_messages = [(0, 0, {
-            'body': 'What is the answer?',
-            'important': True,
-        })]
-        # There must be 4 messages, 1 important
-        self.assertEqual(len(discussion.messages), 4)
-        self.assertEqual(len(discussion.important_messages), 1)
-        self.assertEqual(len(discussion.very_important_messages), 1)
-        discussion.very_important_messages |= Message.new({
-            'body': '42',
-            'important': True,
-        })
-        # There must be 5 messages, 2 important
-        self.assertEqual(len(discussion.messages), 5)
-        self.assertEqual(len(discussion.important_messages), 2)
-        self.assertEqual(len(discussion.very_important_messages), 2)
-
 
 class TestX2many(common.TransactionCase):
     def test_search_many2many(self):