diff --git a/lib/kgrader/runtime.rb b/lib/kgrader/runtime.rb
index fe0e9eb..4141b92 100644
--- a/lib/kgrader/runtime.rb
+++ b/lib/kgrader/runtime.rb
@@ -7,17 +7,22 @@ module KGrader
 
     def testcase(options)
       puts " running test: #{File.basename $0} ".center MAX_COLS, '='
+
       begin
         Timeout::timeout options[:alarm] { yield }
       rescue Timeout::Error
         comment "timeout"
         grade 0
       end
-      puts " done ".center MAX_COLS, '-'
+
+      puts "no grade received?"
+      comment "autograde error (no grade reported); please contact staff"
+      grade 0
     end
 
     def grade(score)
       IO.new(3).write score
+      puts " done ".center MAX_COLS, '-'
       exit
     end
 
diff --git a/spec/cs241h b/spec/cs241h
index 514bd96..22fd6cb 160000
--- a/spec/cs241h
+++ b/spec/cs241h
@@ -1 +1 @@
-Subproject commit 514bd96d25d797ceb17f166f508e3195afb795f1
+Subproject commit 22fd6cb688fcce712b4b68235533b59753aeaed7