diff --git a/lib/abf_worker/base_observer.rb b/lib/abf_worker/base_observer.rb
index 6f2befd2d..45151da79 100644
--- a/lib/abf_worker/base_observer.rb
+++ b/lib/abf_worker/base_observer.rb
@@ -30,8 +30,7 @@ module AbfWorker
       sort_results_and_save results
     end
 
-    def sort_results_and_save(results, item = nil)
-      item ||= subject
+    def sort_results_and_save(results, item = subject)
       item.results = results.sort_by{ |r| r['file_name'] }
       item.save!
     end