diff --git a/addons/stock/models/stock_picking.py b/addons/stock/models/stock_picking.py
index f8d35c3396f..472752f5a6c 100644
--- a/addons/stock/models/stock_picking.py
+++ b/addons/stock/models/stock_picking.py
@@ -907,6 +907,9 @@ class Picking(models.Model):
                 continue
             if picking.immediate_transfer or any(move.additional for move in picking.move_lines):
                 picking.action_confirm()
+                # Make sure the reservation is bypassed in immediate transfer mode.
+                if picking.immediate_transfer:
+                    picking.move_lines.write({'state': 'assigned'})
 
     def _create_backorder(self):
         """ This method is called when the user chose to create a backorder. It will create a new
diff --git a/addons/stock/tests/test_move2.py b/addons/stock/tests/test_move2.py
index f4932803b1e..1ed13fa6141 100644
--- a/addons/stock/tests/test_move2.py
+++ b/addons/stock/tests/test_move2.py
@@ -1880,6 +1880,7 @@ class TestSinglePicking(TestStockCommon):
                 'product_uom': self.productA.uom_id.id,
                 'location_id': self.stock_location,
                 'location_dest_id': self.customer_location,
+                'quantity_done': 5,
             })],
         })
         self.assertEqual(delivery_order.state, 'assigned')