diff --git a/bootstraptest/test_marshal.rb b/bootstraptest/test_marshal.rb
index 7e34176169..ecbcb60c91 100644
--- a/bootstraptest/test_marshal.rb
+++ b/bootstraptest/test_marshal.rb
@@ -1,5 +1,5 @@
 
 assert_normal_exit %q{
-  Marshal.load(Marshal.dump({"k"=>"v"}), lambda {|v| v})
+  Marshal.load(Marshal.dump({"k"=>"v"}), lambda {|v| })
 }