diff --git a/addons/stock/test/inventory.yml b/addons/stock/test/inventory.yml
index 6afc7e9d4ba..b687aded288 100644
--- a/addons/stock/test/inventory.yml
+++ b/addons/stock/test/inventory.yml
@@ -83,8 +83,8 @@
   !python {model: stock.inventory}: |
     inv = self.browse(cr, uid, ref('inventory_test1'), context=context)
     assert inv.line_ids and len(inv.line_ids) == 1, "Wrong number of inventory lines."
-    assert len(inv.line_ids[0].product_qty) == 10, "Wrong quantity in inventory line."
-    assert len(inv.line_ids[0].product_id.id) == ref('inventory_product'), "Wrong product in inventory line."
+    assert inv.line_ids[0].product_qty == 10, "Wrong quantity in inventory line."
+    assert inv.line_ids[0].product_id.id == ref('inventory_product'), "Wrong product in inventory line."
 -
   I modify the inventory line and set the quantity to 20 product on this new inventory
 -