diff --git a/ng2-components/ng2-activiti-tasklist/src/services/activiti-tasklist.service.spec.ts b/ng2-components/ng2-activiti-tasklist/src/services/activiti-tasklist.service.spec.ts
index 357ff8d23d..eb5c154dd1 100644
--- a/ng2-components/ng2-activiti-tasklist/src/services/activiti-tasklist.service.spec.ts
+++ b/ng2-components/ng2-activiti-tasklist/src/services/activiti-tasklist.service.spec.ts
@@ -158,7 +158,7 @@ describe('ActivitiTaskListService', () => {
             },
             (err: any) => {
                 expect(err).toBeDefined();
-                expect(err._body).toEqual('{"error":"wrong request"}');
+                expect(err.json().error).toEqual('wrong request');
             }
         );
 
@@ -288,5 +288,22 @@ describe('ActivitiTaskListService', () => {
     });
 
 
+    it('should complete the task ', (done) => {
+
+        service.completeTask(999).subscribe(
+            (res: any) => {
+                expect(res).toBeDefined();
+                done();
+            }
+        );
+
+        jasmine.Ajax.requests.mostRecent().respondWith({
+            'status': 200,
+            contentType: 'application/json',
+            responseText: JSON.stringify({})
+        });
+    });
+
+
 
 });
diff --git a/ng2-components/ng2-activiti-tasklist/src/services/activiti-tasklist.service.ts b/ng2-components/ng2-activiti-tasklist/src/services/activiti-tasklist.service.ts
index 5f9e4bb6fa..8d646dddae 100644
--- a/ng2-components/ng2-activiti-tasklist/src/services/activiti-tasklist.service.ts
+++ b/ng2-components/ng2-activiti-tasklist/src/services/activiti-tasklist.service.ts
@@ -153,6 +153,7 @@ export class ActivitiTaskListService {
      */
     completeTask(id: string): Observable<TaskDetailsModel> {
         return Observable.fromPromise(this.callApiCompleteTask(id))
+            .map(res => res.json())
             .catch(this.handleError);
     }