Jest is picking up an old version of a package and thus my tests fail unless I use --no-cache. I can even delete the package folder from folder node_modules and Jest is happy to run the tests (almost all are passing).

So how do I clear the Jest cache?

4 Answers

As of Jest 22.0.0+, you can use the --clearCache option:

Deletes the Jest cache directory and then exits without running tests. Will delete cacheDirectory if the option is passed, or Jest's default cache directory.

0

Just run:

jest --clearCache

If you have installed Jest as a dependency in your Node.js project and the jest command doesn't work, just create a new script inside your package.json file.

{ ... "scripts:" { "clear_jest": "jest --clearCache" } ...
}

And then, run in your terminal:

npm run clear_jest

---

With modern NPM, you could also run (credits to johny):

npx jest --clearCache

2

You can find the cache location by running jest --showConfig. Look for the cacheDirectory key. Its value is the name of the folder you'll need to remove.

1

First, you need to know the Jest version:

yarn jest --version

---

Jest >= 22.0.0

yarn jest --clearCache

Jest < 22.0.0

yarn jest --showConfig | grep cacheDir

Returns (you need to remove that folder)

 "cacheDirectory": "/tmp/jest_rs",

Then, you remove it

rm -rf /tmp/jest_rs

---

If you don’t use Yarn, do instructions with npx jest.

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