diff --git a/lib/active_model/serializer.rb b/lib/active_model/serializer.rb
index 46cb7183..06deb23b 100644
--- a/lib/active_model/serializer.rb
+++ b/lib/active_model/serializer.rb
@@ -355,9 +355,6 @@ module ActiveModel
       serializable_hashes = (hash[key] ||= [])
 
       serializables.each do |serializable|
-        puts key
-        puts serializable.inspect
-
         unless already_serialized.include? serializable.object
           already_serialized[serializable.object] = true
           serializable_hashes << serializable.serializable_hash