diff --git a/mail_debrand/tests/test_mail_debrand.py b/mail_debrand/tests/test_mail_debrand.py
index 3067c5e..1852301 100644
--- a/mail_debrand/tests/test_mail_debrand.py
+++ b/mail_debrand/tests/test_mail_debrand.py
@@ -1,5 +1,6 @@
 # Copyright 2017 Tecnativa - Pedro M. Baeza
 # Copyright 2020 Onestein - Andrea Stirpe
+# Copyright 2021 Sodexis
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 
 from odoo.tests import common
@@ -9,17 +10,21 @@ from odoo.tools.misc import mute_logger
 class TestMailDebrand(common.TransactionCase):
     def setUp(self):
         super().setUp()
-        self.default_arch = self.env.ref("mail.message_notification_email").arch
-        self.paynow_arch = self.env.ref("mail.mail_notification_paynow").arch
+        self.default_template = self.env.ref("mail.message_notification_email")
+        self.paynow_template = self.env.ref("mail.mail_notification_paynow")
 
     def test_default_debrand(self):
-        self.assertIn("using", self.default_arch)
-        res = self.env["mail.template"]._debrand_body(self.default_arch)
+        self.assertIn("using", self.default_template.arch)
+        res = self.env["mail.template"]._render_template(
+            self.default_template.arch, "ir.ui.view", [self.default_template]
+        )
         self.assertNotIn("using", res)
 
     def test_paynow_debrand(self):
-        self.assertIn("Powered by", self.paynow_arch)
-        res = self.env["mail.template"]._debrand_body(self.paynow_arch)
+        self.assertIn("Powered by", self.paynow_template.arch)
+        res = self.env["mail.template"]._render_template(
+            self.paynow_template.arch, "ir.ui.view", [self.paynow_template]
+        )
         self.assertNotIn("Powered by", res)
 
     def test_lang_paynow_debrand(self):
@@ -29,10 +34,12 @@ class TestMailDebrand(common.TransactionCase):
             ).lang_install()
         with mute_logger("odoo.tools.translate"):
             self.env["base.update.translations"].create({"lang": "nl_NL"}).act_update()
-
         ctx = dict(lang="nl_NL")
-        paynow_template = self.env.ref("mail.mail_notification_paynow")
-        paynow_arch = paynow_template.with_context(ctx).arch
+        paynow_arch = self.paynow_template.with_context(ctx).arch
         self.assertIn("Aangeboden door", paynow_arch)
-        res = self.env["mail.template"].with_context(ctx)._debrand_body(paynow_arch)
+        res = (
+            self.env["mail.template"]
+            .with_context(ctx)
+            ._render_template(paynow_arch, "ir.ui.view", [self.paynow_template])
+        )
         self.assertNotIn("Aangeboden door", res)