diff --git a/addons/sale_stock/tests/test_sale_stock.py b/addons/sale_stock/tests/test_sale_stock.py
index ab39a0d2129..1544c78288c 100644
--- a/addons/sale_stock/tests/test_sale_stock.py
+++ b/addons/sale_stock/tests/test_sale_stock.py
@@ -52,7 +52,7 @@ class TestSaleStock(TestSale):
         pick_2 = self.so.picking_ids[0]
         pick_2.force_assign()
         pick_2.pack_operation_product_ids.write({'qty_done': 1})
-        self.assertIsNone(pick_2.do_new_transfer(), 'Sale Stock: second picking should be final without need for a backorder')
+        self.assertTrue(pick_2.do_new_transfer(), 'Sale Stock: second picking should be final without need for a backorder')
         self.assertEqual(self.so.invoice_status, 'to invoice', 'Sale Stock: so invoice_status should be "to invoice" after complete delivery')
         del_qties = [sol.qty_delivered for sol in self.so.order_line]
         del_qties_truth = [2.0 if sol.product_id.type in ['product', 'consu'] else 0.0 for sol in self.so.order_line]
@@ -100,7 +100,7 @@ class TestSaleStock(TestSale):
         pick = self.so.picking_ids
         pick.force_assign()
         pick.pack_operation_product_ids.write({'qty_done': 2})
-        self.assertIsNone(pick.do_new_transfer(), 'Sale Stock: complete delivery should not need a backorder')
+        self.assertTrue(pick.do_new_transfer(), 'Sale Stock: complete delivery should not need a backorder')
         del_qties = [sol.qty_delivered for sol in self.so.order_line]
         del_qties_truth = [2.0 if sol.product_id.type in ['product', 'consu'] else 0.0 for sol in self.so.order_line]
         self.assertEqual(del_qties, del_qties_truth, 'Sale Stock: delivered quantities are wrong after partial delivery')
diff --git a/addons/stock/models/stock_picking.py b/addons/stock/models/stock_picking.py
index 9a00c2660d4..f5039f3d618 100644
--- a/addons/stock/models/stock_picking.py
+++ b/addons/stock/models/stock_picking.py
@@ -847,7 +847,7 @@ class Picking(models.Model):
             if pack_operations_delete:
                 pack_operations_delete.unlink()
         self.do_transfer()
-        return
+        return True
 
     def check_backorder(self):
         need_rereserve, all_op_processed = self.picking_recompute_remaining_quantities(done_qtys=True)