diff --git a/app/controllers/concerns/submission_scoring.rb b/app/controllers/concerns/submission_scoring.rb
index da28520a..a0847373 100644
--- a/app/controllers/concerns/submission_scoring.rb
+++ b/app/controllers/concerns/submission_scoring.rb
@@ -46,7 +46,7 @@ module SubmissionScoring
         # end
       end
     end
-    futures.map(&:value)
+    futures.map(&:value!)
   end
 
   private :collect_test_results