diff --git a/addons/sale_expense/tests/test_sale_expense.py b/addons/sale_expense/tests/test_sale_expense.py
index fd856e52ef0..899423b4e5c 100644
--- a/addons/sale_expense/tests/test_sale_expense.py
+++ b/addons/sale_expense/tests/test_sale_expense.py
@@ -15,6 +15,7 @@ class TestSaleExpense(TestSale):
             'order_line': [(0, 0, {'name': prod.name, 'product_id': prod.id, 'product_uom_qty': 2, 'product_uom': prod.uom_id.id, 'price_unit': prod.list_price})],
             'pricelist_id': self.env.ref('product.list0').id,
         })
+        so._compute_tax_id()
         so.action_confirm()
         so._create_analytic_account()  # normally created at so confirmation when you use the right products
         init_price = so.amount_total