diff --git a/mail_autosubscribe/__manifest__.py b/mail_autosubscribe/__manifest__.py
index 2a9e5d6..0183c34 100644
--- a/mail_autosubscribe/__manifest__.py
+++ b/mail_autosubscribe/__manifest__.py
@@ -10,6 +10,9 @@
     "license": "AGPL-3",
     "category": "Marketing",
     "depends": ["mail"],
+    "external_dependencies": {
+        "python": ["odoo_test_helper"],
+    },
     "website": "https://github.com/OCA/social",
     "data": [
         "security/ir.model.access.csv",
diff --git a/mail_autosubscribe/readme/CONTRIBUTORS.rst b/mail_autosubscribe/readme/CONTRIBUTORS.rst
index df7472d..0024277 100644
--- a/mail_autosubscribe/readme/CONTRIBUTORS.rst
+++ b/mail_autosubscribe/readme/CONTRIBUTORS.rst
@@ -1,3 +1,7 @@
 * `Camptocamp <https://www.camptocamp.com>`_
 
      * Iván Todorovich <ivan.todorovich@gmail.com>
+
+* `Moduon <https://www.moduon.team/>`__
+
+     * Jairo Llopis
diff --git a/mail_autosubscribe/tests/test_mail_autosubscribe.py b/mail_autosubscribe/tests/test_mail_autosubscribe.py
index 6c16f03..27969c8 100644
--- a/mail_autosubscribe/tests/test_mail_autosubscribe.py
+++ b/mail_autosubscribe/tests/test_mail_autosubscribe.py
@@ -28,8 +28,8 @@ class TestMailAutosubscribe(TransactionCase):
             {
                 "model_id": cls.fake_order_model.id,
                 "name": "Fake Order: Send by Mail",
-                "subject": "Fake Order: ${object.partner_id.name}",
-                "partner_to": "${object.partner_id.id}",
+                "subject": "Fake Order: {{object.partner_id.name}}",
+                "partner_to": "{{object.partner_id.id}}",
                 "body_html": "Hello, this is a fake order",
             }
         )
@@ -111,7 +111,7 @@ class TestMailAutosubscribe(TransactionCase):
                 default_composition_mode="comment",
             )
         )
-        composer.save().send_mail()
+        composer.save().action_send_mail()
         message = self.order.message_ids[0]
         self.assertEqual(message.partner_ids, self.partner_2 | self.partner_3)
 
@@ -127,6 +127,6 @@ class TestMailAutosubscribe(TransactionCase):
                 default_composition_mode="comment",
             )
         )
-        composer.save().send_mail()
+        composer.save().action_send_mail()
         message = self.order.message_ids[0]
         self.assertEqual(message.partner_ids, self.partner_2)
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..fb06c6f
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,2 @@
+# generated from manifests external_dependencies
+odoo_test_helper