diff --git a/test/test_js_of_ocaml.ml b/test/test_js_of_ocaml.ml
index 66925ef0..501748ce 100644
--- a/test/test_js_of_ocaml.ml
+++ b/test/test_js_of_ocaml.ml
@@ -1,6 +1,6 @@
 open Picos
 
 let () =
-  Printf.printf "Hello, from js_of_ocaml with Picos!\n%!";
   let trigger = Trigger.create () in
-  Trigger.signal trigger
+  Trigger.signal trigger;
+  match Trigger.await trigger with None -> () | Some _ -> assert false