diff --git a/dom/promise/tests/test_promise_utils.html b/dom/promise/tests/test_promise_utils.html
index 16fbc0d9ed1..225481244c9 100644
--- a/dom/promise/tests/test_promise_utils.html
+++ b/dom/promise/tests/test_promise_utils.html
@@ -202,15 +202,23 @@ function promiseRacePromiseArray() {
   }
 
   var arr = [
-    timeoutPromise(50),
-    timeoutPromise(20),
-    timeoutPromise(30),
-    timeoutPromise(100)
+    new Promise(function(resolve) {
+      resolve("first");
+    }),
+    Promise.resolve("second"),
+    new Promise(function() {}),
+    new Promise(function(resolve) {
+      setTimeout(function() {
+        setTimeout(function() {
+          resolve("fourth");
+        }, 0);
+      }, 0);
+    }),
   ];
 
   var p = Promise.race(arr);
   p.then(function(winner) {
-    is(winner, 20, "Fastest timeout should win.");
+    is(winner, "first", "First queued resolution should win the race.");
     runTest();
   });
 }
diff --git a/dom/workers/test/promise_worker.js b/dom/workers/test/promise_worker.js
index 718a0e3c755..2af938d6c67 100644
--- a/dom/workers/test/promise_worker.js
+++ b/dom/workers/test/promise_worker.js
@@ -565,15 +565,23 @@ function promiseRacePromiseArray() {
   }
 
   var arr = [
-    timeoutPromise(50),
-    timeoutPromise(20),
-    timeoutPromise(30),
-    timeoutPromise(100)
+    new Promise(function(resolve) {
+      resolve("first");
+    }),
+    Promise.resolve("second"),
+    new Promise(function() {}),
+    new Promise(function(resolve) {
+      setTimeout(function() {
+        setTimeout(function() {
+          resolve("fourth");
+        }, 0);
+      }, 0);
+    }),
   ];
 
   var p = Promise.race(arr);
   p.then(function(winner) {
-    is(winner, 20, "Fastest timeout should win.");
+    is(winner, "first", "First queued resolution should win the race.");
     runTest();
   });
 }