ts-jest[cli] (FATAL) Cannot find module 'jest-config'

[mlynch]

Issue :

When following the automated install steps, the jest-config module cannot be found

npm install --save-dev jest ts-jest
npx ts-jest config:init

ts-jest[cli] (FATAL) Cannot find module 'jest-config'

Can confirm jest-config is installed in node_modules/

Expected behavior :

npx ts-jest config:init completes

[mlynch]

Nevermind, had some old pinned jest and ts-jest versions from a copied over project. Works now!

[pavvell]

I have the same issue with

jest: v21.0.2
ts-jest: v21.0.0

@mlynch what versions works for you?

[huafu]

@pavvell this looks like very old version, can't you update jest and ts-jest to latest? I think latest jest is 23.6 and for ts-jest 23.10.4 just got published

[jktravis]

I'm in the process of upgrading to the latest version, and now I'm getting this error. The version I was using before ([email protected]) still works, though. Jest itself is now at 23.6.0.

[huafu]

@jktravis this is usually reported by users who have some old version/artefacts remainings in their node_modules directory. The only deps related to jest/ts-jest which should be listed in your package.json should be: ts-jest, jest, typescript, @types/jest and maybe @types/node.

So I'd advise you to check that you have only this (related to jest, except if you have other pre-processors, but things like jest-cli or babel-jest should not be there). Then remove totally your node_modules folder and lock file, and yarn or npm install again.

[jktravis]

I did have babel-jest for some reason. I removed it, deleted my lock file, deleted node_modules and reinstalled with the upgraded version of ts-jest with the same result.

[mikew]

Same here. Latest version of NPM, rm -rf node_modules/ && npm install results in jest-config living in node_modules/jest/node_modules/jest-config/

[huafu]

#853 will be fixing this I think, I'll try to review it this Sun/Mon, tho #758 (comment) is still valid

[Christiangsn]

I managed to solve this problem like this:

my jest.config.ts to add
modulePaths: [ "<rootDir>", "/home/some/other/path" ], moduleDirectories: [ "node_modules" ],

adding this flag will probably solve your problem.