diff --git a/mail_parent_recipient/tests/test_mail_parent_recipient.py b/mail_parent_recipient/tests/test_mail_parent_recipient.py
index a6823c94..d98a7d99 100644
--- a/mail_parent_recipient/tests/test_mail_parent_recipient.py
+++ b/mail_parent_recipient/tests/test_mail_parent_recipient.py
@@ -7,13 +7,14 @@ from odoo.addons.mail.tests.common import TestMail
 
 class TestMailTemplate(TestMail):
 
-    def setUp(self):
-        super(TestMailTemplate, self).setUp()
+    @classmethod
+    def setUpClass(cls):
+        super(TestMailTemplate, cls).setUpClass()
 
-        self.Users = self.env['res.users']
-        self.res_partner = self.env['res.partner']
-        self.mail_template = self.env['mail.template']
-        self.mail_comp_msg = self.env['mail.compose.message']
+        cls.Users = cls.env['res.users']
+        cls.res_partner = cls.env['res.partner']
+        cls.mail_template = cls.env['mail.template']
+        cls.mail_comp_msg = cls.env['mail.compose.message']
 
         # Company
         company_vals = {
@@ -21,29 +22,29 @@ class TestMailTemplate(TestMail):
             'email': 'company.mail.test@company'
         }
 
-        self.company_test = self.res_partner.create(company_vals)
+        cls.company_test = cls.res_partner.create(company_vals)
 
         # Partners test 1 without email
         partner_no_mail_vals = {
             'name': 'partner_1',
-            'parent_id': self.company_test.id,
+            'parent_id': cls.company_test.id,
         }
 
         # Partners test 2 with email
         partner_with_mail_vals = {
             'name': 'partner_2',
             'email': 'partner.2.mail.test@company',
-            'parent_id': self.company_test.id,
+            'parent_id': cls.company_test.id,
         }
 
-        self.partner_no_mail = self.res_partner.create(partner_no_mail_vals)
-        self.partner_with_mail = self.res_partner.create(
+        cls.partner_no_mail = cls.res_partner.create(partner_no_mail_vals)
+        cls.partner_with_mail = cls.res_partner.create(
             partner_with_mail_vals
         )
 
-    def create_mail_composer(self, partner_to_send_id):
-        email_template = self.env['mail.template'].create({
-            'model_id': self.env['ir.model'].search([
+    def create_mail_composer(cls, partner_to_send_id):
+        email_template = cls.env['mail.template'].create({
+            'model_id': cls.env['ir.model'].search([
                 ('model', '=', 'mail.channel')
             ], limit=1).id,
             'name': 'Pigs Template',
@@ -53,7 +54,7 @@ class TestMailTemplate(TestMail):
             'partner_to': '%s' % (partner_to_send_id),
         })
 
-        composer = self.mail_comp_msg.with_context({
+        composer = cls.mail_comp_msg.with_context({
             'default_composition_mode': 'comment',
             'default_model': 'mail.channel',
             'default_use_template': True,
@@ -64,7 +65,7 @@ class TestMailTemplate(TestMail):
         })
         values = composer.onchange_template_id(
             email_template.id,
-            'comment', 'mail.channel', self.group_pigs.id
+            'comment', 'mail.channel', cls.group_pigs.id
         )['value']
 
         # use _convert_to_cache to return a browse record list from command
@@ -76,26 +77,26 @@ class TestMailTemplate(TestMail):
 
         return recipients
 
-    def test_1_mail_send_to_partner_no_mail(self):
+    def test_1_mail_send_to_partner_no_mail(cls):
         """Use company mail if recipient partner has no email."""
-        recipients = self.create_mail_composer(self.partner_no_mail.id)
+        recipients = cls.create_mail_composer(cls.partner_no_mail.id)
 
-        self.assertEqual(recipients.email, self.company_test.email)
-        self.assertNotEqual(recipients.email, self.partner_no_mail.email)
-        self.assertNotEqual(recipients.email, self.partner_with_mail.email)
+        cls.assertEqual(recipients.email, cls.company_test.email)
+        cls.assertNotEqual(recipients.email, cls.partner_no_mail.email)
+        cls.assertNotEqual(recipients.email, cls.partner_with_mail.email)
 
-    def test_2_mail_send_to_partner_with_mail(self):
+    def test_2_mail_send_to_partner_with_mail(cls):
         """Use partner mail if recipient partner has an email."""
-        recipients = self.create_mail_composer(self.partner_with_mail.id)
+        recipients = cls.create_mail_composer(cls.partner_with_mail.id)
 
-        self.assertNotEqual(recipients.email, self.company_test.email)
-        self.assertNotEqual(recipients.email, self.partner_no_mail.email)
-        self.assertEqual(recipients.email, self.partner_with_mail.email)
+        cls.assertNotEqual(recipients.email, cls.company_test.email)
+        cls.assertNotEqual(recipients.email, cls.partner_no_mail.email)
+        cls.assertEqual(recipients.email, cls.partner_with_mail.email)
 
-    def test_3_mail_send_to_company_test(self):
+    def test_3_mail_send_to_company_test(cls):
         """Use company mail if recipient is the company."""
-        recipients = self.create_mail_composer(self.company_test.id)
+        recipients = cls.create_mail_composer(cls.company_test.id)
 
-        self.assertEqual(recipients.email, self.company_test.email)
-        self.assertNotEqual(recipients.email, self.partner_no_mail.email)
-        self.assertNotEqual(recipients.email, self.partner_with_mail.email)
+        cls.assertEqual(recipients.email, cls.company_test.email)
+        cls.assertNotEqual(recipients.email, cls.partner_no_mail.email)
+        cls.assertNotEqual(recipients.email, cls.partner_with_mail.email)