diff --git a/test/core-ajax-progress.html b/test/core-ajax-progress.html
index 0d426a6..7f28a34 100644
--- a/test/core-ajax-progress.html
+++ b/test/core-ajax-progress.html
@@ -43,11 +43,6 @@
           // whether to attach an event listener.
           xhr['onprogress'] = null;
       };
-      var animationFrameFlush = function(callback) {
-        requestAnimationFrame(function(){
-          flush(callback);
-        })
-      };
       var progressEvent = function(lengthComputable, loaded, total) {
         var progress = new ProgressEvent('progress', {
           lengthComputable: lengthComputable,
diff --git a/test/core-ajax-race.html b/test/core-ajax-race.html
index ffca971..700ad12 100644
--- a/test/core-ajax-race.html
+++ b/test/core-ajax-race.html
@@ -44,11 +44,6 @@
       xhr.onCreate = function (xhr) {
           requests.push(xhr);
       };
-      var animationFrameFlush = function(callback) {
-        requestAnimationFrame(function(){
-          flush(callback);
-        })
-      };
 
       // Make request1, then request2. request2 returns first, followed by request1.
       async.series([
@@ -56,13 +51,11 @@
           ajax.url="http://example.org/request1"
           cb();
         },
-        flush,
         animationFrameFlush,
         function(cb) {
           ajax.url="http://example.org/request2"
           cb();
         },
-        flush,
         animationFrameFlush,
         function(cb) {
           requests[0].respond(200, headers, body("http://example.org/request2"));
diff --git a/test/core-ajax.html b/test/core-ajax.html
index 9180fe3..5d1f0d5 100644
--- a/test/core-ajax.html
+++ b/test/core-ajax.html
@@ -52,12 +52,7 @@
               ajax.auto = true;
               cb();
             },
-            flush,
-            function(cb) {
-              requestAnimationFrame(function(){
-                cb();
-              });
-            },
+            animationFrameFlush,
             function(cb){
               requests[0].respond(200, headers, "test text");
               cb();
@@ -80,12 +75,7 @@
               ajax.auto = true;
               cb();
             },
-            flush,
-            function(cb) {
-              requestAnimationFrame(function(){
-                cb();
-              });
-            },
+            animationFrameFlush,
             function(cb){
               requests[0].respond(200, headers,
                           "<note>" +
@@ -116,12 +106,7 @@
               ajax.auto = true;
               cb();
             },
-            flush,
-            function(cb) {
-              requestAnimationFrame(function(){
-                cb();
-              });
-            },
+            animationFrameFlush,
             function(cb){
               requests[0].respond(200, headers,
                           '{"object" : {"list" : [2, 3, {"key": "value"}]}}');
@@ -147,12 +132,7 @@
               ajax.auto = true;
               cb();
             },
-            flush,
-            function(cb) {
-              requestAnimationFrame(function(){
-                cb();
-              });
-            },
+            animationFrameFlush,
             function(cb){
               var buf = new ArrayBuffer(8*4);
               var resp = new Int32Array(buf);
@@ -185,12 +165,7 @@
             ajax.url = "http://example.com/auto";
             cb();
           },
-          flush,
-          function(cb) {
-            requestAnimationFrame(function(){
-              cb();
-            });
-          },
+          animationFrameFlush,
           function(cb){
             assert.equal(requests.length, 1);
             cb();
@@ -203,12 +178,7 @@
             ajax.params = {param: "value"};
             cb();
           },
-          flush,
-          function(cb) {
-            requestAnimationFrame(function(){
-              cb();
-            });
-          },
+          animationFrameFlush,
           function(cb){
             assert.equal(requests.length, 1);
             cb();
@@ -247,24 +217,14 @@
             ajax.auto = false;
             cb();
           },
-          flush,
-          function(cb) {
-            requestAnimationFrame(function(){
-              cb();
-            });
-          },
+          animationFrameFlush,
           function(cb){;
             ajax.handleAs = 'text';
             ajax.url = "http://example.com/text"
             ajax.auto = true;
             cb();
           },
-          flush,
-          function(cb) {
-            requestAnimationFrame(function(){
-              cb();
-            });
-          }
+          animationFrameFlush,
           ], done);
         responded = false;
       });