Uh oh, something went wrong? Use this guide to resolve issues with Jest. Tests are Failing and You Don't Know Why Try using the debugging support built into Node. Place a debugger; statement in any of your tests, and then, in your project's directory, run: node --inspect-brk node_modules/.bin/jest --runInBand [any other arguments here] or on Windows node --inspect-brk ./node_modules/jest/bin/jest