code: function (test) {
      var self = this,
          runner;
  
      runner = this.runner = cluster.fork({
        WORKER_SCRIPT         : './runner',
        WORKER_TEST           : test,
        WORKER_PORT           : this.getPort(),
        REQUESTED_PORTS       : this.requestedPorts,
        WORKER_MAX_MEMORY     : this.maxMemory,
        WORKER_MAX_TESTS      : this.maxTests,
        WORKER_SLOW           : this.slow,
        WORKER_TIMEOUT        : this.timeout,
        TEST_TYPE             : this.testType,
        SUPPORT_FILES         : this.supportFiles,
        REPORTS_URL           : this.reportsUrl,
        COMPILER_MODULES      : this.compilerModules
      });
  
      runner.on('message', function (message) {
        switch (message.type) {
          case 'testResults':
          case 'suiteDone':
            self.emit(message.type, message);
            break;
          default:
            try {
              message.runnerId = runner.id
              self.server.send(message);
            } catch (e) {
              self.disconnectNow();
            }
        }
      });
  
      runner.on('exit', function () {
        self._onDone();
      });
  
      runner.on('disconnect', function () {
        self._onDone();
      });
    }
docs: ServerInstance.run(test)
  - test (String)