这个问题如何解决？

penglindeMacBook-Pro:macaca-test-sample penglin$ make test-ios
macaca doctor

macaca-doctor version: 1.0.23

Node.js checklist:

node env: /usr/local/bin/node
node version: v6.3.1

iOS checklist:

Xcode is installed at: /Applications/Xcode.app/Contents/Developer
Xcode Command Line Tools is ready, version: 2343.
ios_webkit_debug_proxy is installed at: /usr/local/bin/ios_webkit_debug_proxy

Android checklist:

JAVA version is 1.7.0_79
JAVA_HOME is set to /Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home
ANDROID_HOME is set to /usr/local/android-sdk-macosx
Platforms is set to /usr/local/android-sdk-macosx/platforms/android-24
Android tools is set to /usr/local/android-sdk-macosx/tools/android
ADB tool is set to /usr/local/android-sdk-macosx/platform-tools/adb

Installed driver list:

chrome: 1.0.3
electron: 1.1.4
ios: 1.0.40

platform=ios macaca run --verbose -d ./macaca-test/macaca-mobile-sample.test.js

index.js:17:12 [master] pid:641 webdriver server start with config:
{ port: 3456,
verbose: false,
always: true,
window: true,
ip: '192.168.0.106',
host: 'penglindeMacBook-Pro.local',
loaded_time: '2016-10-26 23:57:23' }
middlewares.js:17:10 [master] pid:641 base middlewares attached
router.js:129:10 [master] pid:641 router set
webdriver sdk launched

macaca mobile sample

1) "before all" hook

2) "after all" hook

0 passing (1s)

2 failing

1) macaca mobile sample "before all" hook:
[init({"autoAcceptAlerts":true,"platformName":"iOS","platformVersion":"9.3","deviceName":"iPhone 5s","app":"/Users/penglin/tmp/macaca-test-sample/app/ios-app-bootstrap.zip"})] getaddrinfo ENOTFOUND localhost localhost:3456
Error: getaddrinfo ENOTFOUND localhost localhost:3456
at errnoException (dns.js:28:10)
at GetAddrInfoReqWrap.onlookup as oncomplete

2) macaca mobile sample "after all" hook:
[quit()] getaddrinfo ENOTFOUND localhost localhost:3456
Error: getaddrinfo ENOTFOUND localhost localhost:3456
at errnoException (dns.js:28:10)
at GetAddrInfoReqWrap.onlookup as oncomplete

Test completed!