diff --git a/Gemfile.lock b/Gemfile.lock
index ff3f26cdfd8..a4cb054026b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -254,7 +254,7 @@ GEM
       ffi (~> 1.9)
     minio_runner (0.1.2)
     minitest (5.25.4)
-    mocha (2.6.1)
+    mocha (2.7.1)
       ruby2_keywords (>= 0.0.5)
     msgpack (1.7.5)
     multi_json (1.15.0)
diff --git a/plugins/chat/spec/serializer/chat/channel_serializer_spec.rb b/plugins/chat/spec/serializer/chat/channel_serializer_spec.rb
index f995c5f8066..dd0ca6c775f 100644
--- a/plugins/chat/spec/serializer/chat/channel_serializer_spec.rb
+++ b/plugins/chat/spec/serializer/chat/channel_serializer_spec.rb
@@ -108,7 +108,10 @@ describe Chat::ChannelSerializer do
 
       it "does not get the kick_message_bus_last_id" do
         MessageBus.expects(:last_id).at_least_once
-        MessageBus.expects(:last_id).never
+        MessageBus
+          .expects(:last_id)
+          .with(Chat::Publisher.kick_users_message_bus_channel(chat_channel.id))
+          .never
         expect(serializer.as_json[:meta][:message_bus_last_ids].key?(:kick)).to eq(false)
       end
     end