TypeError: environment.teardown is not a function at node_modules/jest-runner/build/run_test.js

[FaabLondon]

🐛 Bug Report

Hello, I have used create React app and can't make the tests work.
Initially, I got an error message with jest and jest-cli so installed jest with npm install --save-dev jest and then jest-cli with npm install jest-cli.
However, I still get the following message:
Test suite failed to run
TypeError: environment.teardown is not a function
at node_modules/jest-runner/build/run_test.js

Run npx envinfo --preset jest

Paste the results here:
System:
OS: macOS High Sierra 10.13.2
CPU: x64 Intel(R) Core(TM) i5-5350U CPU @ 1.80GHz
Binaries:
Node: 9.4.0 - ~/.nvm/versions/node/v9.4.0/bin/node
Yarn: 1.6.0 - /usr/local/bin/yarn
npm: 6.1.0 - ~/.nvm/versions/node/v9.4.0/bin/npm
npmPackages:
jest: ^23.1.0 => 23.1.0

[iostate]

I'm also experiencing the same issue.

[FaabLondon]

I managed to make it work after deleting package-lock.json, yarn.lock, node_modules, removing jest from the dependencies in package.json, then doing npm install and yarn install!

[SimenB]

If you use CRA, you shouldn't install Jest yourself - it comes with CRA out of the box 🙂

See e.g. #5119 (comment)

[yoryos]

Same issue with clean CRA.

FAIL src/App.test.js
● Test suite failed to run

TypeError: environment.teardown is not a function

  at node_modules/jest-runner/build/run_test.js:191:25

Ran npx envinfo --preset jest
System:
OS: macOS High Sierra 10.13.3
CPU: x64 Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz
Binaries:
Node: 8.9.1 - ~/.nvm/versions/node/v8.9.1/bin/node
Yarn: 1.3.2 - /usr/local/bin/yarn
npm: 5.5.1 - ~/.nvm/versions/node/v8.9.1/bin/npm
npmPackages:
jest: ^23.1.0 => 23.1.0

[yoryos]

Before I could run the tests though the script was complaining that it was missing the jest-cli.

I installed that, then got this error.

[jwickens]

For me a workaround was removing the config option testEnvironment: 'node'. Is the node test environment not bundled in the latest jest?

[SimenB]

Again, don't install Jest if you use CRA

[iostate]

Was able to fix using @FaabLondon's suggestion above.

[louishoang]

Same issue for me with or without standalone Jest. I tried @FaabLondon 's suggestion but no luck. The issue tends to happen after installing a new package.

System:
OS: macOS High Sierra 10.13.5
CPU: x64 Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
Binaries:
Node: 10.3.0 - ~/.nvm/versions/node/v10.3.0/bin/node
Yarn: 1.7.0 - /usr/local/bin/yarn
npm: 6.1.0 - ~/Desktop/maximax/wada-front/node_modules/.bin/npm
npmPackages:
jest: ^23.1.0 => 23.1.0

[iostate]

@louishoang I have a few questions in order to gauge your development environment and when the issue is occurring on your machine.

1. The error occurs after installing a new NPM package, so therefore, it worked before installing an NPM package? Which NPM package was installed immediately before jest broke?
2. The issue tends to happen after installing a new package or new packages (plural)? If the latter, how did you get jest to work again?
3. Can you post your entire package.json?
4. Was jest actually in your package.json?
5. Did you create your React app using CRA?
6. Did you go about deleting all 3 files/directories (package-lock.json, yarn.lock, node_modules), removing jest from the dependencies in package.json?

[louishoang]

@iostate , please have a look at this gist

1. I was trying to install lodash and then react-slick. After installing any package, the error will happen.
2. I had to do a fresh install of npm to solve the issue and it's kinda tedious.
3. Yes, my app was generated using CRA.
4. I deleted package-lock.json, yarn.lock and node_modules, run npm install and yarn install. This is another error that I'm seeing:

yarn run v1.7.0
$ react-scripts test --env=jsdom --modulePaths=src
2018-06-11 15:44 node[36736] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)
2018-06-11 15:44 node[36736] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)
events.js:167
      throw er; // Unhandled 'error' event
      ^

Error: EMFILE: too many open files, watch
    at FSEvent.FSWatcher._handle.onchange (fs.js:1370:28)
Emitted 'error' event at:
    at FSEvent.FSWatcher._handle.onchange (fs.js:1376:12)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

[danielmiclos]

Before installing jest and jest-cli and I had exact the same error as @louishoang.

Now I'm having the "TypeError: environment.teardown is not a function" issue.

I'm running OSX 10.12.6

[jdnichollsc]

Same issue from AppCenter:

[command]/usr/local/bin/npm test

> [email protected] test /Users/vsts/agent/2.134.2/work/1/s/react-native
> jest

FAIL src/components/Catalog/__tests__/ProductList-test.js
  ● Test suite failed to run

    TypeError: environment.teardown is not a function

      at node_modules/jest-runner/build/run_test.js:191:25

FAIL src/components/Catalog/__tests__/CategoryList-test.js
  ● Test suite failed to run

    TypeError: environment.teardown is not a function

      at node_modules/jest-runner/build/run_test.js:191:25

Test Suites: 2 failed, 2 total
Tests:       0 total
Snapshots:   0 total
Time:        5.679s
Ran all test suites.
npm ERR! Test failed.  See above for more details.
##[error]npm failed with error: /usr/local/bin/npm failed with return code: 1

[revanthCopart]

Worked when I used the same jest version as the react scripts jest version. Which in my case is 20.0.4. Lot of them mentioned that we should not be installing jest ourselves since it comes with react-scripts but that didn't work for me.

[louishoang]

@revanthCopart Did you have to install jest-cli? And if you do, what is the version that works for you?

[revanthCopart]

@louishoang I had to install jest-cli version 20.0.4.

[louishoang]

Thanks, @revanthCopart! I managed to get back on track by doing the following steps:

1. Delete package-lock.json, yarn.lock, node_modules.

2. Deleting jest from package.json didn't help me because npm install and yarn install re-installed 2 versions of jest when inspecting package-lock.json. I removed jest and jest-cli completely by: npm uninstall jest jest-cli and yarn remove jest jest-cli.

3. npm install then yarn install.

4. At this point, I have the issue mentioned in Watch mode stopped working on macOS Sierra #1767. brew install watchman fixed it. 🎉

[greyscaled]

I had to also install jest-cli as without doing so I got the error as documented below. But here's the kicker - it could not find my tests (0 matches) after doing so. I've never had trouble with jest/cra on windows like this until this most recent project.

Error Stack

$ npm run test

> [email protected] test C:\Users\...
> react-scripts test --env=jsdom

module.js:545
    throw err;
    ^

Error: Cannot find module 'C:\Users\...\node_modules\jest-cli'
    at Function.Module._resolveFilename (module.js:543:15)
    at Function.Module._load (module.js:470:25)
    at Module.require (module.js:593:17)
    at require (internal/module.js:11:18)
    at getJest (C:\Users\...\node_modules\jest\node_modules\jest-cli\build\cli\getJest.js:22:12)
    at Object.run (C:\Users\...\node_modules\jest\node_modules\jest-cli\build\cli\index.js:39:48)
    at Object.<anonymous> (C:\Users\...\node_modules\react-scripts\scripts\test.js:104:6)
    at Module._compile (module.js:649:30)
    at Object.Module._extensions..js (module.js:660:10)
    at Module.load (module.js:561:32)

Environment

• win10
• yarn 1.3.2
• npm 6.1.0
• node v9.9.0
• create-react-app 1.5.2
• react-scripts 1.1.4

EDIT: Solved
Precisely as in #6393 (comment) everything worked after installing jest-cli@20.0.4

Do not simply run npm install --save-dev jest-cli as ^23 will be installed and things will still break.

[VladFiliucov]

I am using jest version 21.2.1.
In my case I had to install jest-cli 21.2.1 in order to fix this

[citius]

@yoryos

• remove jest-cli from your deps
• remove *.lock files,
• remove node_modules
• run yarn install or npm i, relates from you using tool.

[pwlmaciejewski]

Just FYI.

In my TS project that doesn't use CRA I was getting

yarn run v1.7.0
$ jest
 FAIL  tests/xxx.test.ts
  ● Test suite failed to run

    TypeError: environment.teardown is not a function

      at node_modules/jest-runner/build/run_test.js:191:25

The solution was to align jest with ts-jest MAJOR.MINOR and install jest-cli with matching version:

"jest": "~23.0.1",
"jest-cli": "~23.0.1",
"ts-jest": "~23.0.1",

The higher version of jest-cli was throwing the error.

[NickTomlin]

@pwlmaciejewski thank you for that.

I was encountering this using an ejected CRA (without typescript) where I had npm i jest-cli after ejecting.

When I aligned my versions of jest and jest-cli jest started successfully.

[prashantalhat]

I followed these steps

1. Delete jest from node modules
2. Delete package.lock file
3. Delete jest entry from package.json file
4. ReInstall jest npm package
   to get it working

[tratnayake]

Following the above steps but using version 20.0.4 worked for me.

1. Delete jest and jest-cli from node modules.
2. Delete package.lock file
3. Update package.json file for following:

dependencies": {
    "jest": "20.0.4",
    "jest-cli": "20.0.4",

4. Reinstall using npm install

[davis-mwangi]

@tratnayake your solutions works like a charm.

[jstowers]

@tratnayake, good job!

[jstowers]

@citius, good job! I followed your instructions and deleted jest-cli. Tests are working now.

[mohcinenazrhan]

I followed these steps

Delete node modules folder
ReInstall packages
to get it working

[Divivek]

Same with me delete and reload the node Modules and it's working.

[denisx]

try this https://stackoverflow.com/a/52118404/9074387

[luiscvalmeida]

I fixed this by removing @jest-environment jsdom from the comment header on the top of my spec files. I had this from a previous jest version.

[RrNn]

had the same issue @FaabLondon's solution above helped me fix it.

[psyanite]

I installed some jest packages, and like everyone said, it kept throwing the same error, UNTIL I deleted package-lock.json, deleted node_modules, and ran npm install luckily it literally only took 1 minute. BUT NOW IT WORKS! well it's throwing another error now, at least.

[cliff76]

I'm having this problem currently because I am attempting to use the inlineSnapshots feature which is not available in the version installed via CRA. I've submitted a feature request to CRA to upgrade but in the interim, is there any workaround to allow use of inlineSnapshots in a CRA project?

[thymikee]

eject or react-app-rewired

[ghost]

@tratnayake Thanks mate!

[lepirlouit]

This problem is coming up again.

I removed yarn.lock, package-lock.json and node_modules
I have no jest dependency in package.json
with yarn it installs version 20.0.3 of jest-environment-jsdom (and problem occurs)
with npm version 23.4.0 is installed and no more problems.

[PavanGangireddy]

Was able to fix using @FaabLondon's suggestion above.

[Maweypeyyu]

In my case there was one of my dependencies that depended on an old jest version that caused it. After doing a

grep -A3 _requiredBy node_modules/jest-environment-jsdom/package.json

I found out which package was the cause of it ( which included jest as dependency instead of devDependency ). Moving jest to devDeps on that package fixed the issue.

[victorwvieira]

I deleted the "jest-cli" dependency and run "yarn install". Now it works!

[sftwre]

I managed to make it work after deleting package-lock.json, yarn.lock, node_modules, removing jest from the dependencies in package.json, then doing npm install and yarn install!
I believe you should only be using one package manager at a time (either npm or yarn). Using both has given me a lot problems in the past, because of unsynced dependencies between the two .lock files.

[jzebgul]

hi i remove node-modules and yarn and package-lock.json && then install yarn first then yarn add [email protected] and in the end npm install and it works for me .

[sayax]

Hi, i fixed my issue with the following steps:

1. my jest.config.ts has this lines
   module.exports = {
   testMatch: ['**/+(*.)+(spec|test).+(ts|js)?(x)'],
   transform: {
   '^.+\.(ts|js|html)$': 'ts-jest',
   },
   moduleFileExtensions: ['ts', 'js', 'html'],
   coverageReporters: ['html'],
   };
   i have a separate jest.config.ts for each library used with nrwl
   module.exports = {
   name: 'project-name',
   preset: '../../../../jest.config.js',
   coverageDirectory: '../../../../coverage/libs/libarary',
   snapshotSerializers: [
   'jest-preset-angular/build/AngularNoNgAttributesSnapshotSerializer.js',
   'jest-preset-angular/build/AngularSnapshotSerializer.js',
   'jest-preset-angular/build/HTMLCommentSerializer.js',
   ],
   // setupFilesAfterEnv: ['/src/test-setup.ts'],
   globals: {
   'ts-jest': {
   tsConfig: '/tsconfig.spec.json',
   stringifyContentPathRegex: '\.(html|svg)$',
   astTransformers: [
   'jest-preset-angular/build/InlineFilesTransformer',
   'jest-preset-angular/build/StripStylesTransformer',
   ],
   },
   },
   };
2. installed latest versions of jest
   "jest": "^26.4.2",
   "jest-environment-node": "^26.3.0",
   "jest-environment-jsdom": "^26.3.0",
   then it worked

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