diff --git a/lib/mock-ajax.js b/lib/mock-ajax.js
index 28c2c8d..7bb5615 100644
--- a/lib/mock-ajax.js
+++ b/lib/mock-ajax.js
@@ -37,13 +37,64 @@ getJasmineRequireObj().ajax = function(jRequire) {
   $ajax.RequestTracker = jRequire.AjaxRequestTracker();
   $ajax.StubTracker = jRequire.AjaxStubTracker();
   $ajax.ParamParser = jRequire.AjaxParamParser();
-  $ajax.fakeRequest = jRequire.AjaxFakeRequest();
+  $ajax.eventBus = jRequire.AjaxEventBus();
+  $ajax.fakeRequest = jRequire.AjaxFakeRequest($ajax.eventBus);
   $ajax.MockAjax = jRequire.MockAjax($ajax);
 
   return $ajax.MockAjax;
 };
 
-getJasmineRequireObj().AjaxFakeRequest = function() {
+getJasmineRequireObj().AjaxEventBus = function() {
+  function EventBus() {
+    this.eventList = {};
+  }
+
+  function ensureEvent(eventList, name) {
+    eventList[name] = eventList[name] || [];
+    return eventList[name];
+  }
+
+  function findIndex(list, thing) {
+    if (list.indexOf) {
+      return list.indexOf(thing);
+    }
+
+    for(var i = 0; i < list.length; i++) {
+      if (thing === list[i]) {
+        return i;
+      }
+    }
+
+    return -1;
+  }
+
+  EventBus.prototype.addEventListener = function(event, callback) {
+    ensureEvent(this.eventList, event).push(callback);
+  };
+
+  EventBus.prototype.removeEventListener = function(event, callback) {
+    var index = findIndex(this.eventList[event], callback);
+
+    if (index >= 0) {
+      this.eventList[event].splice(index, 1);
+    }
+  };
+
+  EventBus.prototype.trigger = function(event) {
+    var eventListeners = this.eventList[event];
+
+    if(eventListeners){
+      for(var i = 0; i < eventListeners.length; i++){
+        eventListeners[i]();
+      }
+    }
+  };
+
+  return function() {
+    return new EventBus();
+  };
+};
+getJasmineRequireObj().AjaxFakeRequest = function(eventBusFactory) {
   function extend(destination, source, propertiesToSkip) {
     propertiesToSkip = propertiesToSkip || [];
     for (var property in source) {
@@ -72,15 +123,13 @@ getJasmineRequireObj().AjaxFakeRequest = function() {
   }
 
   function initializeEvents(xhr) {
-    return {
-      'loadstart': wrapProgressEvent(xhr, 'onloadstart'),
-      'load': wrapProgressEvent(xhr, 'onload'),
-      'loadend': wrapProgressEvent(xhr, 'onloadend'),
-      'progress': wrapProgressEvent(xhr, 'onprogress'),
-      'error': wrapProgressEvent(xhr, 'onerror'),
-      'abort': wrapProgressEvent(xhr, 'onabort'),
-      'timeout': wrapProgressEvent(xhr, 'ontimeout')
-    };
+    xhr.eventBus.addEventListener('loadstart', wrapProgressEvent(xhr, 'onloadstart'));
+    xhr.eventBus.addEventListener('load', wrapProgressEvent(xhr, 'onload'));
+    xhr.eventBus.addEventListener('loadend', wrapProgressEvent(xhr, 'onloadend'));
+    xhr.eventBus.addEventListener('progress', wrapProgressEvent(xhr, 'onprogress'));
+    xhr.eventBus.addEventListener('error', wrapProgressEvent(xhr, 'onerror'));
+    xhr.eventBus.addEventListener('abort', wrapProgressEvent(xhr, 'onabort'));
+    xhr.eventBus.addEventListener('timeout', wrapProgressEvent(xhr, 'ontimeout'));
   }
 
   function unconvertibleResponseTypeMessage(type) {
@@ -96,7 +145,8 @@ getJasmineRequireObj().AjaxFakeRequest = function() {
   function fakeRequest(global, requestTracker, stubTracker, paramParser) {
     function FakeXMLHttpRequest() {
       requestTracker.track(this);
-      this.events = initializeEvents(this);
+      this.eventBus = eventBusFactory();
+      initializeEvents(this);
       this.requestHeaders = {};
       this.overriddenMimeType = null;
     }
@@ -181,9 +231,9 @@ getJasmineRequireObj().AjaxFakeRequest = function() {
         this.status = 0;
         this.statusText = "abort";
         this.onreadystatechange();
-        this.events.progress();
-        this.events.abort();
-        this.events.loadend();
+        this.eventBus.trigger('progress');
+        this.eventBus.trigger('abort');
+        this.eventBus.trigger('loadend');
       },
 
       readyState: 0,
@@ -199,22 +249,12 @@ getJasmineRequireObj().AjaxFakeRequest = function() {
       onreadystatechange: function(isTimeout) {
       },
 
-      addEventListener: function(event, callback) {
-        var existingCallback = this.events[event],
-            self = this;
-
-        this.events[event] = function() {
-          callback.apply(self, [{}]);
-          existingCallback();
-        };
+      addEventListener: function() {
+        this.eventBus.addEventListener.apply(this.eventBus, arguments);
       },
       
       removeEventListener: function(event, callback) {
-        var existingCallback = this.events[event];
-
-        if(existingCallback){
-          delete this.events[event];
-        }
+        this.eventBus.removeEventListener.apply(this.eventBus, arguments);
       },
 
       status: null,
@@ -222,7 +262,7 @@ getJasmineRequireObj().AjaxFakeRequest = function() {
       send: function(data) {
         this.params = data;
         this.readyState = 2;
-        this.events.loadstart();
+        this.eventBus.trigger('loadstart');
         this.onreadystatechange();
 
         var stub = stubTracker.findStub(this.url, data, this.method);
@@ -312,9 +352,9 @@ getJasmineRequireObj().AjaxFakeRequest = function() {
         }
 
         this.onreadystatechange();
-        this.events.progress();
-        this.events.load();
-        this.events.loadend();
+        this.eventBus.trigger('progress');
+        this.eventBus.trigger('load');
+        this.eventBus.trigger('loadend');
       },
 
       responseTimeout: function() {
@@ -324,9 +364,9 @@ getJasmineRequireObj().AjaxFakeRequest = function() {
         this.readyState = 4;
         jasmine.clock().tick(30000);
         this.onreadystatechange('timeout');
-        this.events.progress();
-        this.events.timeout();
-        this.events.loadend();
+        this.eventBus.trigger('progress');
+        this.eventBus.trigger('timeout');
+        this.eventBus.trigger('loadend');
       },
 
       responseError: function() {
@@ -335,9 +375,9 @@ getJasmineRequireObj().AjaxFakeRequest = function() {
         }
         this.readyState = 4;
         this.onreadystatechange();
-        this.events.progress();
-        this.events.error();
-        this.events.loadend();
+        this.eventBus.trigger('progress');
+        this.eventBus.trigger('error');
+        this.eventBus.trigger('loadend');
       }
     });
 
diff --git a/spec/eventBusSpec.js b/spec/eventBusSpec.js
new file mode 100644
index 0000000..da4d074
--- /dev/null
+++ b/spec/eventBusSpec.js
@@ -0,0 +1,71 @@
+describe('EventBus', function() {
+  beforeEach(function() {
+    this.bus = getJasmineRequireObj().AjaxEventBus()();
+  });
+
+  it('calls an event listener', function() {
+    var callback = jasmine.createSpy('callback');
+
+    this.bus.addEventListener('foo', callback);
+    this.bus.trigger('foo');
+
+    expect(callback).toHaveBeenCalled();
+  });
+
+  it('only triggers callbacks for the specified event', function() {
+    var fooCallback = jasmine.createSpy('foo'),
+        barCallback = jasmine.createSpy('bar');
+
+    this.bus.addEventListener('foo', fooCallback);
+    this.bus.addEventListener('bar', barCallback);
+
+    this.bus.trigger('foo');
+
+    expect(fooCallback).toHaveBeenCalled();
+    expect(barCallback).not.toHaveBeenCalled();
+  });
+
+  it('calls all the callbacks for the specified event', function() {
+    var callback1 = jasmine.createSpy('callback');
+    var callback2 = jasmine.createSpy('otherCallback');
+
+    this.bus.addEventListener('foo', callback1);
+    this.bus.addEventListener('foo', callback2);
+
+    this.bus.trigger('foo');
+
+    expect(callback1).toHaveBeenCalled();
+    expect(callback2).toHaveBeenCalled();
+  });
+
+  it('works if there are no callbacks for the event', function() {
+    var bus = this.bus;
+    expect(function() {
+      bus.trigger('notActuallyThere');
+    }).not.toThrow();
+  });
+
+  it('does not call listeners that have been removed', function() {
+    var callback = jasmine.createSpy('callback');
+
+    this.bus.addEventListener('foo', callback);
+    this.bus.removeEventListener('foo', callback);
+    this.bus.trigger('foo');
+
+    expect(callback).not.toHaveBeenCalled();
+  });
+
+  it('only removes the specified callback', function() {
+    var callback1 = jasmine.createSpy('callback');
+    var callback2 = jasmine.createSpy('otherCallback');
+
+    this.bus.addEventListener('foo', callback1);
+    this.bus.addEventListener('foo', callback2);
+    this.bus.removeEventListener('foo', callback2);
+
+    this.bus.trigger('foo');
+
+    expect(callback1).toHaveBeenCalled();
+    expect(callback2).not.toHaveBeenCalled();
+  });
+});
\ No newline at end of file
diff --git a/spec/fakeRequestSpec.js b/spec/fakeRequestSpec.js
index f7998c5..19e2a9d 100644
--- a/spec/fakeRequestSpec.js
+++ b/spec/fakeRequestSpec.js
@@ -4,6 +4,14 @@ describe('FakeRequest', function() {
     this.stubTracker = { findStub: function() {} };
     var parserInstance = this.parserInstance = jasmine.createSpy('parse');
     this.paramParser = { findParser: function() { return { parse: parserInstance }; } };
+    var eventBus = this.fakeEventBus = {
+      addEventListener: jasmine.createSpy('addEventListener'),
+      trigger: jasmine.createSpy('trigger'),
+      removeEventListener: jasmine.createSpy('removeEventListener')
+    };
+    this.eventBusFactory = function() {
+      return eventBus;
+    };
     this.fakeGlobal = {
       XMLHttpRequest: function() {
         this.extraAttribute = 'my cool attribute';
@@ -11,7 +19,7 @@ describe('FakeRequest', function() {
       DOMParser: window.DOMParser,
       ActiveXObject: window.ActiveXObject
     };
-    this.FakeRequest = getJasmineRequireObj().AjaxFakeRequest()(this.fakeGlobal, this.requestTracker, this.stubTracker, this.paramParser);
+    this.FakeRequest = getJasmineRequireObj().AjaxFakeRequest(this.eventBusFactory)(this.fakeGlobal, this.requestTracker, this.stubTracker, this.paramParser);
   });
 
   it('extends from the global XMLHttpRequest', function() {
@@ -22,7 +30,7 @@ describe('FakeRequest', function() {
 
   it('skips XMLHttpRequest attributes that IE does not want copied', function() {
     // use real window here so it will correctly go red on IE if it breaks
-    var FakeRequest = getJasmineRequireObj().AjaxFakeRequest()(window, this.requestTracker, this.stubTracker, this.paramParser);
+    var FakeRequest = getJasmineRequireObj().AjaxFakeRequest(this.eventBusFactory)(window, this.requestTracker, this.stubTracker, this.paramParser);
     var request = new FakeRequest();
 
     expect(request.responseBody).toBeUndefined();
@@ -197,186 +205,143 @@ describe('FakeRequest', function() {
     });
   });
 
+  it('registers on-style callback with the event bus', function() {
+    this.request = new this.FakeRequest();
+
+    expect(this.fakeEventBus.addEventListener).toHaveBeenCalledWith('loadstart', jasmine.any(Function));
+    expect(this.fakeEventBus.addEventListener).toHaveBeenCalledWith('progress', jasmine.any(Function));
+    expect(this.fakeEventBus.addEventListener).toHaveBeenCalledWith('abort', jasmine.any(Function));
+    expect(this.fakeEventBus.addEventListener).toHaveBeenCalledWith('error', jasmine.any(Function));
+    expect(this.fakeEventBus.addEventListener).toHaveBeenCalledWith('load', jasmine.any(Function));
+    expect(this.fakeEventBus.addEventListener).toHaveBeenCalledWith('timeout', jasmine.any(Function));
+    expect(this.fakeEventBus.addEventListener).toHaveBeenCalledWith('loadend', jasmine.any(Function));
+
+    this.request.onloadstart = jasmine.createSpy('loadstart');
+    this.request.onprogress = jasmine.createSpy('progress');
+    this.request.onabort = jasmine.createSpy('abort');
+    this.request.onerror = jasmine.createSpy('error');
+    this.request.onload = jasmine.createSpy('load');
+    this.request.ontimeout = jasmine.createSpy('timeout');
+    this.request.onloadend = jasmine.createSpy('loadend');
+
+    var args = this.fakeEventBus.addEventListener.calls.allArgs();
+    for (var i = 0; i < args.length; i++) {
+      var eventName = args[i][0],
+          busCallback = args[i][1];
+
+      busCallback();
+      expect(this.request['on' + eventName]).toHaveBeenCalled();
+    }
+  });
+  
+  it('delegates addEventListener to the eventBus', function() {
+    this.request = new this.FakeRequest();
+    
+    this.request.addEventListener('foo', 'bar');
+    
+    expect(this.fakeEventBus.addEventListener).toHaveBeenCalledWith('foo', 'bar');
+  });
+
+  it('delegates removeEventListener to the eventBus', function() {
+    this.request = new this.FakeRequest();
+
+    this.request.removeEventListener('foo', 'bar');
+
+    expect(this.fakeEventBus.removeEventListener).toHaveBeenCalledWith('foo', 'bar');
+  });
+
   describe('triggering progress events', function() {
     beforeEach(function() {
       this.request = new this.FakeRequest();
-
-      spyOn(this.request, 'onloadstart');
-      spyOn(this.request, 'onprogress');
-      spyOn(this.request, 'onabort');
-      spyOn(this.request, 'onerror');
-      spyOn(this.request, 'onload');
-      spyOn(this.request, 'ontimeout');
-      spyOn(this.request, 'onloadend');
-
-      var spies = {};
-
-      spies.loadstart1 = jasmine.createSpy('loadstart1');
-      spies.loadstart2 = jasmine.createSpy('loadstart2');
-      this.request.addEventListener('loadstart', spies.loadstart1);
-      this.request.addEventListener('loadstart', spies.loadstart2);
-
-      spies.progress1 = jasmine.createSpy('progress1');
-      spies.progress2 = jasmine.createSpy('progress2');
-      this.request.addEventListener('progress', spies.progress1);
-      this.request.addEventListener('progress', spies.progress2);
-
-      spies.abort1 = jasmine.createSpy('abort1');
-      spies.abort2 = jasmine.createSpy('abort2');
-      this.request.addEventListener('abort', spies.abort1);
-      this.request.addEventListener('abort', spies.abort2);
-
-      spies.error1 = jasmine.createSpy('error1');
-      spies.error2 = jasmine.createSpy('error2');
-      this.request.addEventListener('error', spies.error1);
-      this.request.addEventListener('error', spies.error2);
-
-      spies.load1 = jasmine.createSpy('load1');
-      spies.load2 = jasmine.createSpy('load2');
-      this.request.addEventListener('load', spies.load1);
-      this.request.addEventListener('load', spies.load2);
-
-      spies.timeout1 = jasmine.createSpy('timeout1');
-      spies.timeout2 = jasmine.createSpy('timeout2');
-      this.request.addEventListener('timeout', spies.timeout1);
-      this.request.addEventListener('timeout', spies.timeout2);
-
-      spies.loadend1 = jasmine.createSpy('loadend1');
-      spies.loadend2 = jasmine.createSpy('loadend2');
-      this.request.addEventListener('loadend', spies.loadend1);
-      this.request.addEventListener('loadend', spies.loadend2);
-
-      this.resetEvents = function() {
-        var request = this.request;
-        var events = ['loadstart', 'progress', 'abort', 'error', 'load', 'timeout', 'loadend'];
-        for (var index in events) {
-          var event = events[index];
-          request['on' + event].calls.reset();
-          spies[event + '1'].calls.reset();
-          spies[event + '2'].calls.reset();
-        }
-      };
-
-      jasmine.addMatchers({
-        toHaveTriggeredEvent: function(util) {
-          return {
-            compare: function(actual, expected) {
-              var direct = actual['on' + expected].calls.any();
-              var event1 = spies[expected + '1'].calls.any();
-              var event2 = spies[expected + '2'].calls.any();
-              var pass = direct && event1 && event2;
-
-              var missed = [], triggered = [];
-
-              (direct ? triggered : missed).push('direct');
-              (event1 ? triggered : missed).push(expected + '1');
-              (event2 ? triggered : missed).push(expected + '2');
-
-              return {
-                pass: pass,
-                message: pass ?
-                  'Expected XHR not to have triggered ' + expected + ' but ' + triggered.join(', ') + ' triggered' :
-                  'Expected XHR to have triggered ' + expected + ' but ' + missed.join(', ') + " didn't trigger"
-              };
-            }
-          };
-        }
-      });
     });
 
     it('should not trigger any events to start', function() {
       this.request.open();
 
-      expect(this.request).not.toHaveTriggeredEvent('loadstart');
-      expect(this.request).not.toHaveTriggeredEvent('progress');
-      expect(this.request).not.toHaveTriggeredEvent('abort');
-      expect(this.request).not.toHaveTriggeredEvent('error');
-      expect(this.request).not.toHaveTriggeredEvent('load');
-      expect(this.request).not.toHaveTriggeredEvent('timeout');
-      expect(this.request).not.toHaveTriggeredEvent('loadend');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalled();
     });
 
     it('should trigger loadstart when sent', function() {
       this.request.open();
       this.request.send();
 
-      expect(this.request).toHaveTriggeredEvent('loadstart');
-      expect(this.request).not.toHaveTriggeredEvent('progress');
-      expect(this.request).not.toHaveTriggeredEvent('abort');
-      expect(this.request).not.toHaveTriggeredEvent('error');
-      expect(this.request).not.toHaveTriggeredEvent('load');
-      expect(this.request).not.toHaveTriggeredEvent('timeout');
-      expect(this.request).not.toHaveTriggeredEvent('loadend');
+      expect(this.fakeEventBus.trigger).toHaveBeenCalledWith('loadstart');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalledWith('progress');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalledWith('abort');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalledWith('error');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalledWith('load');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalledWith('timeout');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalledWith('loadend');
     });
 
     it('should trigger abort, progress, loadend when aborted', function() {
       this.request.open();
       this.request.send();
 
-      this.resetEvents();
+      this.fakeEventBus.trigger.calls.reset();
 
       this.request.abort();
 
-      expect(this.request).not.toHaveTriggeredEvent('loadstart');
-      expect(this.request).toHaveTriggeredEvent('progress');
-      expect(this.request).toHaveTriggeredEvent('abort');
-      expect(this.request).not.toHaveTriggeredEvent('error');
-      expect(this.request).not.toHaveTriggeredEvent('load');
-      expect(this.request).not.toHaveTriggeredEvent('timeout');
-      expect(this.request).toHaveTriggeredEvent('loadend');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalledWith('loadstart');
+      expect(this.fakeEventBus.trigger).toHaveBeenCalledWith('progress');
+      expect(this.fakeEventBus.trigger).toHaveBeenCalledWith('abort');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalledWith('error');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalledWith('load');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalledWith('timeout');
+      expect(this.fakeEventBus.trigger).toHaveBeenCalledWith('loadend');
     });
 
     it('should trigger error, progress, loadend when network error', function() {
       this.request.open();
       this.request.send();
 
-      this.resetEvents();
+      this.fakeEventBus.trigger.calls.reset();
 
       this.request.responseError();
 
-      expect(this.request).not.toHaveTriggeredEvent('loadstart');
-      expect(this.request).toHaveTriggeredEvent('progress');
-      expect(this.request).not.toHaveTriggeredEvent('abort');
-      expect(this.request).toHaveTriggeredEvent('error');
-      expect(this.request).not.toHaveTriggeredEvent('load');
-      expect(this.request).not.toHaveTriggeredEvent('timeout');
-      expect(this.request).toHaveTriggeredEvent('loadend');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalledWith('loadstart');
+      expect(this.fakeEventBus.trigger).toHaveBeenCalledWith('progress');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalledWith('abort');
+      expect(this.fakeEventBus.trigger).toHaveBeenCalledWith('error');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalledWith('load');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalledWith('timeout');
+      expect(this.fakeEventBus.trigger).toHaveBeenCalledWith('loadend');
     });
 
     it('should trigger timeout, progress, loadend when timing out', function() {
       this.request.open();
       this.request.send();
 
-      this.resetEvents();
+      this.fakeEventBus.trigger.calls.reset();
 
       jasmine.clock().install();
       this.request.responseTimeout();
       jasmine.clock().uninstall();
 
-      expect(this.request).not.toHaveTriggeredEvent('loadstart');
-      expect(this.request).toHaveTriggeredEvent('progress');
-      expect(this.request).not.toHaveTriggeredEvent('abort');
-      expect(this.request).not.toHaveTriggeredEvent('error');
-      expect(this.request).not.toHaveTriggeredEvent('load');
-      expect(this.request).toHaveTriggeredEvent('timeout');
-      expect(this.request).toHaveTriggeredEvent('loadend');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalledWith('loadstart');
+      expect(this.fakeEventBus.trigger).toHaveBeenCalledWith('progress');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalledWith('abort');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalledWith('error');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalledWith('load');
+      expect(this.fakeEventBus.trigger).toHaveBeenCalledWith('timeout');
+      expect(this.fakeEventBus.trigger).toHaveBeenCalledWith('loadend');
     });
 
     it('should trigger load, progress, loadend when responding', function() {
       this.request.open();
       this.request.send();
 
-      this.resetEvents();
+      this.fakeEventBus.trigger.calls.reset();
 
       this.request.respondWith({ status: 200 });
 
-      expect(this.request).not.toHaveTriggeredEvent('loadstart');
-      expect(this.request).toHaveTriggeredEvent('progress');
-      expect(this.request).not.toHaveTriggeredEvent('abort');
-      expect(this.request).not.toHaveTriggeredEvent('error');
-      expect(this.request).toHaveTriggeredEvent('load');
-      expect(this.request).not.toHaveTriggeredEvent('timeout');
-      expect(this.request).toHaveTriggeredEvent('loadend');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalledWith('loadstart');
+      expect(this.fakeEventBus.trigger).toHaveBeenCalledWith('progress');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalledWith('abort');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalledWith('error');
+      expect(this.fakeEventBus.trigger).toHaveBeenCalledWith('load');
+      expect(this.fakeEventBus.trigger).not.toHaveBeenCalledWith('timeout');
+      expect(this.fakeEventBus.trigger).toHaveBeenCalledWith('loadend');
     });
   });
 
diff --git a/src/eventBus.js b/src/eventBus.js
new file mode 100644
index 0000000..29d07a4
--- /dev/null
+++ b/src/eventBus.js
@@ -0,0 +1,50 @@
+getJasmineRequireObj().AjaxEventBus = function() {
+  function EventBus() {
+    this.eventList = {};
+  }
+
+  function ensureEvent(eventList, name) {
+    eventList[name] = eventList[name] || [];
+    return eventList[name];
+  }
+
+  function findIndex(list, thing) {
+    if (list.indexOf) {
+      return list.indexOf(thing);
+    }
+
+    for(var i = 0; i < list.length; i++) {
+      if (thing === list[i]) {
+        return i;
+      }
+    }
+
+    return -1;
+  }
+
+  EventBus.prototype.addEventListener = function(event, callback) {
+    ensureEvent(this.eventList, event).push(callback);
+  };
+
+  EventBus.prototype.removeEventListener = function(event, callback) {
+    var index = findIndex(this.eventList[event], callback);
+
+    if (index >= 0) {
+      this.eventList[event].splice(index, 1);
+    }
+  };
+
+  EventBus.prototype.trigger = function(event) {
+    var eventListeners = this.eventList[event];
+
+    if(eventListeners){
+      for(var i = 0; i < eventListeners.length; i++){
+        eventListeners[i]();
+      }
+    }
+  };
+
+  return function() {
+    return new EventBus();
+  };
+};
\ No newline at end of file
diff --git a/src/fakeRequest.js b/src/fakeRequest.js
index b8b0f59..261460e 100644
--- a/src/fakeRequest.js
+++ b/src/fakeRequest.js
@@ -1,4 +1,4 @@
-getJasmineRequireObj().AjaxFakeRequest = function() {
+getJasmineRequireObj().AjaxFakeRequest = function(eventBusFactory) {
   function extend(destination, source, propertiesToSkip) {
     propertiesToSkip = propertiesToSkip || [];
     for (var property in source) {
@@ -27,15 +27,13 @@ getJasmineRequireObj().AjaxFakeRequest = function() {
   }
 
   function initializeEvents(xhr) {
-    return {
-      'loadstart': wrapProgressEvent(xhr, 'onloadstart'),
-      'load': wrapProgressEvent(xhr, 'onload'),
-      'loadend': wrapProgressEvent(xhr, 'onloadend'),
-      'progress': wrapProgressEvent(xhr, 'onprogress'),
-      'error': wrapProgressEvent(xhr, 'onerror'),
-      'abort': wrapProgressEvent(xhr, 'onabort'),
-      'timeout': wrapProgressEvent(xhr, 'ontimeout')
-    };
+    xhr.eventBus.addEventListener('loadstart', wrapProgressEvent(xhr, 'onloadstart'));
+    xhr.eventBus.addEventListener('load', wrapProgressEvent(xhr, 'onload'));
+    xhr.eventBus.addEventListener('loadend', wrapProgressEvent(xhr, 'onloadend'));
+    xhr.eventBus.addEventListener('progress', wrapProgressEvent(xhr, 'onprogress'));
+    xhr.eventBus.addEventListener('error', wrapProgressEvent(xhr, 'onerror'));
+    xhr.eventBus.addEventListener('abort', wrapProgressEvent(xhr, 'onabort'));
+    xhr.eventBus.addEventListener('timeout', wrapProgressEvent(xhr, 'ontimeout'));
   }
 
   function unconvertibleResponseTypeMessage(type) {
@@ -51,7 +49,8 @@ getJasmineRequireObj().AjaxFakeRequest = function() {
   function fakeRequest(global, requestTracker, stubTracker, paramParser) {
     function FakeXMLHttpRequest() {
       requestTracker.track(this);
-      this.events = initializeEvents(this);
+      this.eventBus = eventBusFactory();
+      initializeEvents(this);
       this.requestHeaders = {};
       this.overriddenMimeType = null;
     }
@@ -136,9 +135,9 @@ getJasmineRequireObj().AjaxFakeRequest = function() {
         this.status = 0;
         this.statusText = "abort";
         this.onreadystatechange();
-        this.events.progress();
-        this.events.abort();
-        this.events.loadend();
+        this.eventBus.trigger('progress');
+        this.eventBus.trigger('abort');
+        this.eventBus.trigger('loadend');
       },
 
       readyState: 0,
@@ -154,22 +153,12 @@ getJasmineRequireObj().AjaxFakeRequest = function() {
       onreadystatechange: function(isTimeout) {
       },
 
-      addEventListener: function(event, callback) {
-        var existingCallback = this.events[event],
-            self = this;
-
-        this.events[event] = function() {
-          callback.apply(self, [{}]);
-          existingCallback();
-        };
+      addEventListener: function() {
+        this.eventBus.addEventListener.apply(this.eventBus, arguments);
       },
       
       removeEventListener: function(event, callback) {
-        var existingCallback = this.events[event];
-
-        if(existingCallback){
-          delete this.events[event];
-        }
+        this.eventBus.removeEventListener.apply(this.eventBus, arguments);
       },
 
       status: null,
@@ -177,7 +166,7 @@ getJasmineRequireObj().AjaxFakeRequest = function() {
       send: function(data) {
         this.params = data;
         this.readyState = 2;
-        this.events.loadstart();
+        this.eventBus.trigger('loadstart');
         this.onreadystatechange();
 
         var stub = stubTracker.findStub(this.url, data, this.method);
@@ -267,9 +256,9 @@ getJasmineRequireObj().AjaxFakeRequest = function() {
         }
 
         this.onreadystatechange();
-        this.events.progress();
-        this.events.load();
-        this.events.loadend();
+        this.eventBus.trigger('progress');
+        this.eventBus.trigger('load');
+        this.eventBus.trigger('loadend');
       },
 
       responseTimeout: function() {
@@ -279,9 +268,9 @@ getJasmineRequireObj().AjaxFakeRequest = function() {
         this.readyState = 4;
         jasmine.clock().tick(30000);
         this.onreadystatechange('timeout');
-        this.events.progress();
-        this.events.timeout();
-        this.events.loadend();
+        this.eventBus.trigger('progress');
+        this.eventBus.trigger('timeout');
+        this.eventBus.trigger('loadend');
       },
 
       responseError: function() {
@@ -290,9 +279,9 @@ getJasmineRequireObj().AjaxFakeRequest = function() {
         }
         this.readyState = 4;
         this.onreadystatechange();
-        this.events.progress();
-        this.events.error();
-        this.events.loadend();
+        this.eventBus.trigger('progress');
+        this.eventBus.trigger('error');
+        this.eventBus.trigger('loadend');
       }
     });
 
diff --git a/src/requireAjax.js b/src/requireAjax.js
index a20dccd..3659239 100644
--- a/src/requireAjax.js
+++ b/src/requireAjax.js
@@ -37,7 +37,8 @@ getJasmineRequireObj().ajax = function(jRequire) {
   $ajax.RequestTracker = jRequire.AjaxRequestTracker();
   $ajax.StubTracker = jRequire.AjaxStubTracker();
   $ajax.ParamParser = jRequire.AjaxParamParser();
-  $ajax.fakeRequest = jRequire.AjaxFakeRequest();
+  $ajax.eventBus = jRequire.AjaxEventBus();
+  $ajax.fakeRequest = jRequire.AjaxFakeRequest($ajax.eventBus);
   $ajax.MockAjax = jRequire.MockAjax($ajax);
 
   return $ajax.MockAjax;