diff --git a/dom/workers/test/suspend_worker.js b/dom/workers/test/suspend_worker.js
index 43eb24a7ad3..31e826bdc2e 100644
--- a/dom/workers/test/suspend_worker.js
+++ b/dom/workers/test/suspend_worker.js
@@ -5,6 +5,7 @@
 var counter = 0;
 
 var interval = setInterval(function() {
+  dump("WorkerAlive\n"); 
   postMessage(++counter);
 }, 100);
 
diff --git a/dom/workers/test/terminate_worker.js b/dom/workers/test/terminate_worker.js
index ad4e8252773..6b7b3fffbeb 100644
--- a/dom/workers/test/terminate_worker.js
+++ b/dom/workers/test/terminate_worker.js
@@ -10,4 +10,4 @@ onmessage = function(event) {
   throw "No messages should reach me!";
 }
 
-setInterval(function() { postMessage("Still alive!"); }, 100);
+setInterval(function() { dump("WorkerAlive\n"); postMessage("Still alive!"); }, 100);