diff --git a/addons/stock/models/stock_picking.py b/addons/stock/models/stock_picking.py
index 28f8a753977..0028003aa2f 100644
--- a/addons/stock/models/stock_picking.py
+++ b/addons/stock/models/stock_picking.py
@@ -1029,7 +1029,6 @@ class Picking(models.Model):
                 moves_to_backorder.write({'picking_id': backorder_picking.id})
                 moves_to_backorder.mapped('package_level_id').write({'picking_id':backorder_picking.id})
                 moves_to_backorder.mapped('move_line_ids').write({'picking_id': backorder_picking.id})
-                backorder_picking.action_assign()
                 backorders |= backorder_picking
         return backorders
 
diff --git a/addons/stock/tests/test_move2.py b/addons/stock/tests/test_move2.py
index 6b7b822e0af..8c98b886625 100644
--- a/addons/stock/tests/test_move2.py
+++ b/addons/stock/tests/test_move2.py
@@ -117,10 +117,10 @@ class TestPickShip(TestStockCommon):
 
         # Now partially transfer the ship
         picking_client.move_lines[0].move_line_ids[0].qty_done = 5
-        picking_client._action_done() # no new in order to create backorder
+        picking_client._action_done()  # no new in order to create backorder
 
         backorder = self.env['stock.picking'].search([('backorder_id', '=', picking_client.id)])
-        self.assertEqual(backorder.state, 'assigned', 'Backorder should be started')
+        self.assertEqual(backorder.state, 'waiting', 'Backorder should be waiting for reservation')
 
     def test_mto_moves_transfer(self):
         """
@@ -291,8 +291,8 @@ class TestPickShip(TestStockCommon):
         # create a backorder
         picking_pick._action_done()
         picking_pick_backorder = self.env['stock.picking'].search([('backorder_id', '=', picking_pick.id)])
-        self.assertEqual(picking_pick_backorder.state, 'assigned')
-        self.assertEqual(picking_pick_backorder.move_line_ids.product_qty, 5.0)
+        self.assertEqual(picking_pick_backorder.state, 'confirmed')
+        self.assertEqual(picking_pick_backorder.move_lines.product_qty, 5.0)
 
         self.assertEqual(picking_client.state, 'assigned')
 
@@ -771,10 +771,13 @@ class TestSinglePicking(TestStockCommon):
         delivery_order.move_lines[0].move_line_ids[0].qty_done = 1
         delivery_order._action_done()
         self.assertNotEqual(delivery_order.date_done, False)
-        self.assertEqual(self.env['stock.quant']._get_available_quantity(self.productA, pack_location), 0.0)
+        self.assertEqual(self.env['stock.quant']._get_available_quantity(self.productA, pack_location), 1.0)
 
         backorder = self.env['stock.picking'].search([('backorder_id', '=', delivery_order.id)])
+        self.assertEqual(backorder.state, 'confirmed')
+        backorder.action_assign()
         self.assertEqual(backorder.state, 'assigned')
+        self.assertEqual(self.env['stock.quant']._get_available_quantity(self.productA, pack_location), 0.0)
 
     def test_backorder_2(self):
         """ Check the good behavior of creating a backorder for a partially available stock move.