Cannot read property "runClient" of undefined

Im trying to test an app using meteortesting:mocha calling as meteor test --full-app --driver-package=meteortesting:mocha ,but cant make it work, it thows Cannot read property "runClient" of undefined (at client 42:2), effectively it calls an undefined object at that place but don´t know how to edit that part of the code (becuase I have only seen it in the browser and its addres is “http://localhost:/packages/meteor_testing/client.js”) Help to get the TDD up please.

Im using meteor 1.4