def run_mochitest_remote(self, test_paths, **kwargs):
        if self.target_out:
            host_webapps_dir = os.path.join(
                self.target_out,
                'data',
                'local',
                'webapps')
            if not os.path.isdir(
                os.path.join(
                    host_webapps_dir,
                    'test-container.gaiamobile.org')):
                print(
                    ENG_BUILD_REQUIRED %
                    ('mochitest-remote', host_webapps_dir))
                return 1

        from mozbuild.controller.building import BuildDriver

        self._ensure_state_subdir_exists('.')

        driver = self._spawn(BuildDriver)
        driver.install_tests(remove=False)

        mochitest = self._spawn(MochitestRunner)
        return mochitest.run_b2g_test(
            test_paths=test_paths,
            **kwargs)

    def run_mochitest_b2g_desktop(self, test_file, **kwargs):
        from mozbuild.controller.building import BuildDriver

        self._ensure_state_subdir_exists('.')

        driver = self._spawn(BuildDriver)
        driver.install_tests(remove=False)

        mochitest = self._spawn(MochitestRunner)
        return mochitest.run_b2g_test(test_file=test_file, **kwargs)

    def run_mochitest_remote(self, test_file, **kwargs):
        self._ensure_state_subdir_exists('.')

        mochitest = self._spawn(MochitestRunner)
        return mochitest.run_b2g_test(self.b2g_home, self.xre_path,
            test_file=test_file, **kwargs)