diff --git a/content/base/test/test_bug482935.html b/content/base/test/test_bug482935.html
index 4c678ff3adf3..28baea933c28 100644
--- a/content/base/test/test_bug482935.html
+++ b/content/base/test/test_bug482935.html
@@ -29,25 +29,30 @@ function testCancelInPhase4() {
   var xhr = new XMLHttpRequest();
   xhr.addEventListener("readystatechange", function(e) {
     if (xhr.readyState >= 4) {
+      xhr.addEventListener("abort", function() {
+        setTimeout(function() {
+          // This request was cancelled, so the responseText should be empty string
+          is(xhr.responseText, "", "Expected empty response to cancelled request");
+
+          // Second request - should be found in cache
+          var xhr2 = new XMLHttpRequest();
+
+          xhr2.addEventListener("load", function() {
+            is(xhr2.responseText, "0", "Received fresh value for second request");
+            testCancelBeforePhase4();
+          }, false);
+
+          xhr2.open("GET", url, false); // note : synch-request
+          xhr2.setRequestHeader("X-Request", "1", false);
+
+          try { xhr2.send(); }
+          catch(e) {
+            is(xhr2.status, "200", "Exception!");
+          }
+        }, 0);
+      }, false);
+
       xhr.abort();
-      SimpleTest.executeSoon(function() {
-        // This request was cancelled, so the responseText should be empty string
-        is(xhr.responseText, "", "Expected empty response to cancelled request");
-
-        // Second request - should be found in cache
-        var xhr2 = new XMLHttpRequest();
-        xhr2.open("GET", url, false); // note : synch-request
-        xhr2.setRequestHeader("X-Request", "1", false);
-
-        try { xhr2.send(); }
-        catch(e) {
-          is(xhr2.status, "200", "Exception!");
-        }
-
-        is(xhr2.responseText, "0", "Received fresh value for second request");
- 
-        testCancelBeforePhase4();
-      });
     }
   }, false);
 
@@ -69,25 +74,30 @@ function testCancelBeforePhase4() {
   var xhr = new XMLHttpRequest();
   xhr.addEventListener("readystatechange", function(e) {
     if (xhr.readyState == 3) {
+      xhr.addEventListener("abort", function() {
+        setTimeout(function() {
+          // This request was cancelled, so the responseText should be empty string
+          is(xhr.responseText, "", "Expected empty response to cancelled request");
+
+          // Second request - should be found in cache
+          var xhr2 = new XMLHttpRequest();
+
+          xhr2.addEventListener("load", function() {
+            is(xhr2.responseText, "1", "Received cached value for second request");
+            SimpleTest.finish();
+          }, false);
+
+          xhr2.open("GET", url, false); // note : synch-request
+          xhr2.setRequestHeader("X-Request", "1", false);
+
+          try { xhr2.send(); }
+          catch(e) {
+            is(xhr2.status, "200", "Exception!");
+          }
+        }, 0);
+      }, false);
+
       xhr.abort();
-      SimpleTest.executeSoon(function() {
-        // This request was cancelled, so the responseText should be empty string
-        is(xhr.responseText, "", "Expected empty response to cancelled request");
-
-        // Second request - should be found in cache
-        var xhr2 = new XMLHttpRequest();
-        xhr2.open("GET", url, false); // note : synch-request
-        xhr2.setRequestHeader("X-Request", "1", false);
-
-        try { xhr2.send(); }
-        catch(e) {
-          is(xhr2.status, "200", "Exception!");
-        }
-
-        is(xhr2.responseText, "1", "Received cached value for second request");
-
-        SimpleTest.finish();
-      });
     }
   }, false);