diff --git a/static/js/message_list_view.js b/static/js/message_list_view.js
index 54d4b52930..a8717e0f0a 100644
--- a/static/js/message_list_view.js
+++ b/static/js/message_list_view.js
@@ -225,7 +225,7 @@ MessageListView.prototype = {
 
         // Join two groups into one.
         if (this.collapse_messages && same_recipient(last_msg_container, first_msg_container) && same_day(last_msg_container, first_msg_container) && (last_msg_container.msg.historical === first_msg_container.msg.historical)) {
-            if (!last_msg_container.status_message && !first_msg_container.is_me_message && same_sender(last_msg_container, first_msg_container)) {
+            if (!last_msg_container.status_message && !first_msg_container.msg.is_me_message && same_sender(last_msg_container, first_msg_container)) {
                 first_msg_container.include_sender = false;
             }
             if (same_sender(last_msg_container, first_msg_container)) {
diff --git a/zerver/tests/frontend/node/message_list_view.js b/zerver/tests/frontend/node/message_list_view.js
index d9268b9060..5e64f454fc 100644
--- a/zerver/tests/frontend/node/message_list_view.js
+++ b/zerver/tests/frontend/node/message_list_view.js
@@ -207,7 +207,7 @@ set_global('unread', {message_unread: function () {}});
             message1
         ]);
 
-        var message2 = build_message_context({}, {is_me_message: true});
+        var message2 = build_message_context({is_me_message: true});
         var message_group2 = build_message_group([
             message2
         ]);