Failed `npm test` on Windows build, works fine on Mac & Linux builds as well as my Windows PC

Here’s the build: https://travis-ci.org/tom-sherman/coffeebird/jobs/547144381

And the script in question:

prettier --list-different "./**/*.js" && eslint "./**/*.js"

In package.json: https://github.com/tom-sherman/coffeebird/blob/3e02c7287929ca8dd9d8bff3d42ad01ab632acab/package.json#L8

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