storybook: [React] `yarn test` fail after getstorybook

Issue details

After getstorybook into create-react-app projects, yarn test throws the following error:

2018-03-14 18:55 node[1827] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)
2018-03-14 18:55 node[1827] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)
2018-03-14 18:55 node[1827] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)
events.js:183
      throw er; // Unhandled 'error' event

yarn test calls Jest in file watching mode by default, and I found that CI=true yarn test (single run mode) does not throw the error.

Steps to reproduce

create-react-app storybook-sample
cd storybook-sample
yarn add @storybook/cli@3.4.0-rc.2
yarn run getstorybook
yarn test

Please specify which version of Storybook and optionally any affected addons that you’re running

• @storybook/react 3.4.0-rc.2

Affected platforms

• OS: macOS Sierra(10.12.6)
• Node.js: 8.9.3
• yarn: 1.3.2

Screenshots / Screencast / Code Snippets (Optional)

// code here