diff --git a/account_move_tier_validation/models/account_move.py b/account_move_tier_validation/models/account_move.py
index aed37b56a0f5..ea08491ef40c 100644
--- a/account_move_tier_validation/models/account_move.py
+++ b/account_move_tier_validation/models/account_move.py
@@ -1,7 +1,7 @@
 # Copyright <2020> PESOL <info@pesol.es>
 # License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl)
 
-from odoo import _, api, models
+from odoo import api, models
 
 
 class AccountMove(models.Model):
@@ -25,13 +25,13 @@ def _get_under_validation_exceptions(self):
     def _get_to_validate_message_name(self):
         name = super()._get_to_validate_message_name()
         if self.move_type == "in_invoice":
-            name = _("Bill")
+            name = self.env._("Bill")
         elif self.move_type == "in_refund":
-            name = _("Refund")
+            name = self.env._("Refund")
         elif self.move_type == "out_invoice":
-            name = _("Invoice")
+            name = self.env._("Invoice")
         elif self.move_type == "out_refund":
-            name = _("Credit Note")
+            name = self.env._("Credit Note")
         return name
 
     def action_post(self):
diff --git a/account_move_tier_validation/tests/test_tier_validation.py b/account_move_tier_validation/tests/test_tier_validation.py
index a17ddd78dea5..49ab351dc99e 100644
--- a/account_move_tier_validation/tests/test_tier_validation.py
+++ b/account_move_tier_validation/tests/test_tier_validation.py
@@ -1,7 +1,7 @@
 # Copyright 2018 ForgeFlow S.L.
 # License LGPL-3.0 or later (http://www.gnu.org/licenses/lgpl.html).
 
-from odoo import _, fields
+from odoo import fields
 from odoo.exceptions import ValidationError
 from odoo.tests import Form
 from odoo.tests.common import TransactionCase, tagged
@@ -76,7 +76,7 @@ def test_03_move_post(self):
         invoice.invalidate_model()
         invoice.validate_tier()
         with self.assertRaisesRegex(
-            ValidationError, _("You are not allowed to write those fields")
+            ValidationError, self.env._("You are not allowed to write those fields")
         ):
             invoice._post()
         # Calls _post method by passing context skip_validation_check set to True