account_expense, = Account.search([
                    ('kind', '=', 'expense'),
                    ])

            templates = ProductTemplate.create([{
                        'name': 'Template',
                        'list_price': Decimal(10.0),
                        'default_uom': unit.id,
                        'account_expense': account_expense.id,
                        }, {
                        'name': 'Other Template',
                        'list_price': Decimal(10.0),
                        'default_uom': unit.id,
                        }])
            self.assertEqual(
                templates[0].account_expense_used,
                account_expense)

            with self.assertRaises(UserError):
                templates[1].account_expense_used