diff --git a/addons/sale/models/sale.py b/addons/sale/models/sale.py
index bf35fcbc35c..9e3987e4089 100644
--- a/addons/sale/models/sale.py
+++ b/addons/sale/models/sale.py
@@ -1064,8 +1064,7 @@ class SaleOrderLine(models.Model):
         for line in self:
             fpos = line.order_id.fiscal_position_id or line.order_id.partner_id.property_account_position_id
             # If company_id is set, always filter taxes by the company
-            line_company_id = line.company_id or line.order_id.company_id
-            taxes = line.product_id.taxes_id.filtered(lambda r: not line_company_id or r.company_id == line_company_id)
+            taxes = line.product_id.taxes_id.filtered(lambda r: not line.company_id or r.company_id == line.company_id)
             line.tax_id = fpos.map_tax(taxes, line.product_id, line.order_id.partner_shipping_id) if fpos else taxes
 
     @api.model
diff --git a/addons/sale/tests/test_sale_order.py b/addons/sale/tests/test_sale_order.py
index bb3223b0e7f..ddf5c865cd2 100644
--- a/addons/sale/tests/test_sale_order.py
+++ b/addons/sale/tests/test_sale_order.py
@@ -265,23 +265,13 @@ class TestSaleOrder(TestCommonSaleNoChart):
                           'Taxes should be applied')
 
     def test_so_create_multicompany(self):
-        # Preparing test Data
+        """Check that only taxes of the right company are applied on the lines."""
         user_demo = self.env.ref('base.user_demo')
         company_1 = self.env.ref('base.main_company')
         company_2 = self.env['res.company'].create({
             'name': 'company 2',
             'parent_id': company_1.id,
         })
-        user_demo.write({
-            'groups_id': [(4, self.env.ref('sales_team.group_sale_manager').id, False)],
-            'company_ids': [(6, False, [company_1.id])],
-            'company_id': company_1.id,
-        })
-
-        so_partner = self.env.ref('base.res_partner_2')
-        so_partner.write({
-            'property_account_position_id': False,
-        })
 
         tax_company_1 = self.env['account.tax'].create({
             'name': 'T1',
@@ -300,16 +290,10 @@ class TestSaleOrder(TestCommonSaleNoChart):
             'taxes_id': [(6, False, [tax_company_1.id, tax_company_2.id])],
         })
 
-        # Use case
         so_1 = self.env['sale.order'].with_user(user_demo.id).create({
-            'partner_id': so_partner.id,
+            'partner_id': self.env.ref('base.res_partner_2').id,
             'company_id': company_1.id,
         })
-        so_1.invalidate_cache()
-
-        # This is what is done when importing the csv lines (on sale.order):
-        # id,order_line/product_id
-        # __export__.sale_order_37_1bb960ba,Product name
         so_1.write({
             'order_line': [(0, False, {'product_id': product_shared.product_variant_id.id, 'order_id': so_1.id})],
         })