Cloud computing provides software as a service over the internet. With the increasing popularity of cloud applications, the development of error-free cloud-based applications that function reliably is necessary. Software development under the cloud computing model brings the advantage that new applications can be rapidly constructed by tailoring existing services. However, such a development model reduces the testability of the application. To address this problem the approach of Test Support as-a-Service (TSaaS) is proposed. This paper presents a user interface prototype for the TSaaS approach to investigate the feasibility of the proposed TSaaS approach. The paper presents the user interface design for the TSaaS approach and compares the approach with the other existing approaches. In this way, with the help of proposed user interface, one can now test the integration of cloud-based services effectively with the help of third service TSaaS.