Jest TypeError: Path must be a string. Received undefined

Question

Below settings for my package.json

If I run from command line npm test all jest test cases are executed properly. In case I use directly the command jest from command line I receive this error:

Test suite failed to run

TypeError: Path must be a string. Received undefined

  at assertPath (path.js:7:11)
  at Object.relative (path.js:538:5)

This happens on any test files.

Any idea what could be wrong and how to fix it?

 "scripts": {
        "test": "standard && jest",
        "format": "standard --fix",
        "start": "webpack-dev-server --config webpack.config.dev.js",
        "build": "webpack --config webpack.config.prod.js"
    },

Since the project configuration is such a common failure point for builds involving jest (and other node/JS/NPM/yarn libraries) including all of your package.json is as important as including code. The answers below reflect this; they're mostly just telling you to clean and reinstall, which only helps if your config was basically working in the first place, and it probably is the problem. — Neal, Jul 01 '20 at 16:48

score 20 · Accepted Answer · answered Sep 15 '17 at 18:51

20

I solved this issue using:

npm uninstall -g jest
npm install -g jest
npm cache clean
npm install

answered Sep 15 '17 at 18:51

GibboK

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score 19 · Answer 2 · answered Sep 15 '17 at 16:36

19

I am not entirely sure what the problem here is, but I was facing the same issue and what worked for me was updating the Jest version. I was using 20 but I switched to 21 and now it magically works again.

Update version in package.json and then run rm -rf node_modules && npm install

answered Sep 15 '17 at 16:36

eyarmush

191
2

Thanks for sharing! – GibboK Sep 15 '17 at 17:05
Had the same issue. Upgrading to 21 fixed it. Even got a progress bar for the tests :) – Tommy Nov 17 '17 at 10:03

score 15 · Answer 3 · answered Nov 27 '17 at 12:18

15

In my case i had to update jest to version 21.x (from 20.x).

Try running npm install jest@latest --save-dev.

answered Nov 27 '17 at 12:18

Robin

527
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score 7 · Answer 4 · answered Nov 23 '17 at 16:11

7

For me, it was the jest-cli package bumping to 21.x. So npm update jest-cli --save-dev

answered Nov 23 '17 at 16:11

Dominic Tracey

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score 2 · Answer 5 · answered Sep 08 '18 at 10:34

2

For me I had to downgrade. Version 21.x worked for me.

answered Sep 08 '18 at 10:34

Will Humphreys

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score 2 · Answer 6 · answered Nov 01 '18 at 12:49

I solved this issue using:

remove node_modules remove package-lock.json

remove dev dependence from package.json of jest npm remove jest --save-dev.

npm cache clean

then run command npm install

then install npm install jest@latest --save-dev

this works for me

score 1 · Answer 7 · answered Feb 20 '20 at 15:18

1

npm install react-dev-utils@10.1.0

Installing this version of react-dev-utils helped, when sometimes the commands in the accepted answers didn't.

Good luck y'all!

answered Feb 20 '20 at 15:18

Chihab

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Jest TypeError: Path must be a string. Received undefined

7 Answers7

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