diff --git a/lib/zone.ts b/lib/zone.ts
index 76efc031a..cf4cd79ba 100644
--- a/lib/zone.ts
+++ b/lib/zone.ts
@@ -846,8 +846,9 @@ const Zone: ZoneType = (function(global: any) {
         this._zoneDelegate.handleError(this, err);
         throw err;
       }
-      if ((task as any as ZoneTask<any>)._zoneDelegates === zoneDelegates) {
+      if ((task as any as ZoneTask<any>)._zoneDelegates === zoneDelegates && !(task.data && task.data.isPeriodic)) {
         // we have to check because internally the delegate can reschedule the task.
+        // and we don't need to updateTaskCount for periodic task such as setInterval
         this._updateTaskCount(task as any as ZoneTask<any>, 1);
       }
       if ((task as any as ZoneTask<any>).state == scheduling) {
@@ -891,7 +892,9 @@ const Zone: ZoneType = (function(global: any) {
         this._zoneDelegate.handleError(this, err);
         throw err;
       }
-      this._updateTaskCount(task as ZoneTask<any>, -1);
+      if (!(task.data && task.data.isPeriodic)) {
+        this._updateTaskCount(task as ZoneTask<any>, -1);
+      }
       (task as ZoneTask<any>)._transitionTo(notScheduled, canceling);
       task.runCount = 0;
       return task;
diff --git a/test/common/setInterval.spec.ts b/test/common/setInterval.spec.ts
index 42aaac7b0..c1e868bdc 100644
--- a/test/common/setInterval.spec.ts
+++ b/test/common/setInterval.spec.ts
@@ -60,10 +60,15 @@ describe('setInterval', function() {
     }, null, null, 'unit-test');
   });
 
-  it('should not cancel the task after invoke the setInterval callback', (done) => {
+  it('setInterval should not update task count to trigger onHasTask', (done: Function) => {
     const logs: HasTaskState[] = [];
+    let task: Task;
     const zone = Zone.current.fork({
       name: 'interval',
+      onScheduleTask: (delegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, t: Task) => {
+        task = t;
+        return delegate.scheduleTask(targetZone, task);
+      },
       onHasTask:
           (delegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, hasTask: HasTaskState) => {
             logs.push(hasTask);
@@ -74,17 +79,11 @@ describe('setInterval', function() {
     zone.run(() => {
       const timerId = setInterval(() => {}, 100);
       (global as any)[Zone.__symbol__('setTimeout')](() => {
-        expect(logs.length > 0).toBeTruthy();
-        expect(logs).toEqual(
-            [{microTask: false, macroTask: true, eventTask: false, change: 'macroTask'}]);
+        expect(logs).toEqual([]);
         clearInterval(timerId);
-        expect(logs).toEqual([
-          {microTask: false, macroTask: true, eventTask: false, change: 'macroTask'},
-          {microTask: false, macroTask: false, eventTask: false, change: 'macroTask'}
-        ]);
+        expect(logs).toEqual([]);
         done();
       }, 300);
-    });
+    }); 
   });
-
 });
diff --git a/test/common/zone.spec.ts b/test/common/zone.spec.ts
index f969df913..df40ae193 100644
--- a/test/common/zone.spec.ts
+++ b/test/common/zone.spec.ts
@@ -183,14 +183,7 @@ describe('Zone', function() {
         zone.cancelTask(task);
       });
       expect(log).toEqual([
-        {microTask: false, macroTask: true, eventTask: false, change: 'macroTask', zone: 'parent'},
-        'macroTask', 'macroTask', {
-          microTask: false,
-          macroTask: false,
-          eventTask: false,
-          change: 'macroTask',
-          zone: 'parent'
-        }
+        'macroTask', 'macroTask'
       ]);
     });