diff --git a/test/test.ml b/test/test.ml
index cdacd3b9..2b54f1a2 100644
--- a/test/test.ml
+++ b/test/test.ml
@@ -80,7 +80,8 @@ let () =
   assert (size = 76);
 
   (* for cmp test with signatures.c output *)
+  (*
   let raw_str = Bin.to_string bin dummy_t in
   Printf.printf "%s" raw_str;
-
+  *)
   ()