diff --git a/addons/bus/static/tests/helpers/mock_server.js b/addons/bus/static/tests/helpers/mock_server.js
index 7302d55a25e..7667fe4b11f 100644
--- a/addons/bus/static/tests/helpers/mock_server.js
+++ b/addons/bus/static/tests/helpers/mock_server.js
@@ -118,15 +118,13 @@ patch(MockServer.prototype, {
                 if (typeof target === "string") {
                     return channel === target;
                 }
+                if (Array.isArray(channel) !== Array.isArray(target)) {
+                    return false;
+                }
                 if (Array.isArray(channel)) {
-                    const { __model: cModel, id: cId } = channel;
-                    const { __model: tModel, id: tId } = target;
-                    return (
-                        Array.isArray(target) &&
-                        cModel === tModel &&
-                        cId === tId &&
-                        channel[1] === target[1]
-                    );
+                    const { __model: cModel, id: cId } = channel[0];
+                    const { __model: tModel, id: tId } = target[0];
+                    return cModel === tModel && cId === tId && channel[1] === target[1];
                 }
                 return channel?.__model === target.__model && channel?.id === target?.id;
             })
diff --git a/addons/mail/models/discuss/discuss_channel.py b/addons/mail/models/discuss/discuss_channel.py
index 42503e08a34..9f0ebaa956d 100644
--- a/addons/mail/models/discuss/discuss_channel.py
+++ b/addons/mail/models/discuss/discuss_channel.py
@@ -583,7 +583,9 @@ class Channel(models.Model):
         # notification of the message itself to ensure the channel automatically opens.
         payload = {"id": self.id, "last_interest_dt": fields.Datetime.now()}
         bus_notifications = [
-            ((self, "members"), "mail.record/insert", {"Thread": {"id": self.id, "is_pinned": True}}),
+            ((self, "members"), "mail.record/insert", {
+                "Thread": {"id": self.id, "is_pinned": True, "model": "discuss.channel"}
+            }),
             (self, "discuss.channel/last_interest_dt_changed", payload),
             (self, "discuss.channel/new_message", {"id": self.id, "message": message_format}),
         ]
diff --git a/addons/mail/static/tests/helpers/mock_server/models/mail_thread.js b/addons/mail/static/tests/helpers/mock_server/models/mail_thread.js
index 8fea8010a77..ee459770fb8 100644
--- a/addons/mail/static/tests/helpers/mock_server/models/mail_thread.js
+++ b/addons/mail/static/tests/helpers/mock_server/models/mail_thread.js
@@ -341,6 +341,7 @@ patch(MockServer.prototype, {
                         Thread: {
                             id: channel.id,
                             is_pinned: true,
+                            model: "discuss.channel",
                         },
                     },
                 ]);