Abstract: As more distributed applications are deployed and operated in the fields, companies have to save their effort by distributed testing automation to shorten the time to market. This paper presents a model driven testing automation methodology which supports distributed test execution. To support distributed test execution, deploy model which describes the test execution environment, and schedule model which describes the execution sequence of remote test execution nodes, are presented; and to realize test automation, a general architecture is designed. To show our methodology can reduce the test time effectively, a test experiment on web application is presented.