Unit testing Grunt测试-在200000毫秒内未捕获39mChrome

我正在尝试在TFS构建服务器中运行Grunt测试。当我使用命令提示符手动运行Grunt测试时，测试成功了。但是，当我尝试使用

invoke process

步骤运行Grunt测试时，Grunt测试失败，出现以下错误：

[4mRunning "karma:unit" (karma) task[24m
[32mINFO [launcher]: [39mStarting browser Chrome
[33mWARN [launcher]: [39mChrome have not captured in 200000 ms, killing.
[32mINFO [launcher]: [39mTrying to start Chrome again (1/2).
[33mWARN [launcher]: [39mChrome have not captured in 200000 ms, killing.
[32mINFO [launcher]: [39mTrying to start Chrome again (2/2).
[33mWARN [launcher]: [39mChrome have not captured in 200000 ms, killing.
[31mERROR [launcher]: [39mChrome failed 2 times (timeout). Giving up.
[33mWarning: Task "karma:unit" failed. Use --force to continue.[39m
[31mAborted due to warnings.

Execution Time (2014-05-13 23:25:47 UTC)
karma:unit    600.7s  ■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■ 100%
Total 602.9s

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有人能告诉我为什么这里会出现错误吗？

您必须运行TFS构建服务交互模式才能从中启动UI