diff --git a/lib/ably/models/protocol_message.rb b/lib/ably/models/protocol_message.rb
index 19f8f1e6..0088fded 100644
--- a/lib/ably/models/protocol_message.rb
+++ b/lib/ably/models/protocol_message.rb
@@ -274,6 +274,7 @@ def to_s
     end
 
     # True if the ProtocolMessage appears to be invalid, however this is not a guarantee
+    # Used for validating incoming protocol messages, so no need to add unnecessary checks
     # @return [Boolean]
     # @api private
     def invalid?
diff --git a/lib/ably/realtime/channels.rb b/lib/ably/realtime/channels.rb
index feb47005..e7cf788d 100644
--- a/lib/ably/realtime/channels.rb
+++ b/lib/ably/realtime/channels.rb
@@ -52,7 +52,7 @@ def release(channel)
       # @api private
       def set_channel_serials(serials)
         serials.each do |channel_name, channel_serial|
-          self[channel_name].properties.channel_serial = channel_serial
+          get(channel_name).properties.channel_serial = channel_serial
         end
       end
 
diff --git a/lib/ably/realtime/client/incoming_message_dispatcher.rb b/lib/ably/realtime/client/incoming_message_dispatcher.rb
index f625983d..596c558b 100644
--- a/lib/ably/realtime/client/incoming_message_dispatcher.rb
+++ b/lib/ably/realtime/client/incoming_message_dispatcher.rb
@@ -47,8 +47,8 @@ def dispatch_protocol_message(*args)
                     protocol_message.action == :attached
                   )
             get_channel(protocol_message.channel).tap do |channel|
-              logger.info "Setting channel serial for channel #{channel.name}"
-              logger.info "Previous serial #{channel.properties.channel_serial}, new serial #{protocol_message.channel_serial}"
+              logger.info "Setting channel serial for channel #{channel.name}, " <<
+                          "Previous: #{channel.properties.channel_serial}, New: #{protocol_message.channel_serial}"
               channel.properties.channel_serial = protocol_message.channel_serial
             end
           end