diff --git a/addons/purchase_mrp/tests/test_purchase_mrp_flow.py b/addons/purchase_mrp/tests/test_purchase_mrp_flow.py
index f0dfa3fbc084a..b803eebda5abf 100644
--- a/addons/purchase_mrp/tests/test_purchase_mrp_flow.py
+++ b/addons/purchase_mrp/tests/test_purchase_mrp_flow.py
@@ -971,8 +971,8 @@ def test_valuation_with_backorder(self):
         po.button_confirm()
 
         receipt = po.picking_ids
-        receipt.move_line_ids[0].qty_done = 4
-        receipt.move_line_ids[1].qty_done = 2
+        receipt.move_line_ids[0].quantity = 4
+        receipt.move_line_ids[1].quantity = 2
         action = receipt.button_validate()
         wizard = Form(self.env[action['res_model']].with_context(action['context'])).save()
         wizard.process()