[0.82.0] Unit tests crash when prettier is not installed #54102
Description
Description
Upon upgrading React Native from 0.81.1 to 0.82.0, I began seeing errors during unit testing: "Cannot find module 'prettier' from 'node_modules/react-native/jest/setup.js'".
Steps to reproduce
- Install React Native app
- Remove prettier and ensure you don't have @react-native/eslint-config installed (which is common if you use Biome or oxlint)
- Run Jest unit tests ensuring you have
"preset": "react-native",in your Jest config file
React Native Version
0.82.0
Affected Platforms
Other (please specify)
Output of npx @react-native-community/cli info
info Fetching system and libraries information...
System:
OS: macOS 15.7.1
CPU: (10) arm64 Apple M1 Max
Memory: 372.50 MB / 64.00 GB
Shell:
version: "5.9"
path: /bin/zsh
Binaries:
Node:
version: 24.3.0
path: /usr/local/bin/node
Yarn:
version: 4.10.3
path: /usr/local/bin/yarn
npm: Not Found
Watchman: Not Found
Managers:
CocoaPods:
version: 1.16.2
path: /opt/homebrew/bin/pod
SDKs:
iOS SDK:
Platforms:
- DriverKit 25.0
- iOS 26.0
- macOS 26.0
- tvOS 26.0
- visionOS 26.0
- watchOS 26.0
Android SDK: Not Found
IDEs:
Android Studio: Not Found
Xcode:
version: 26.0.1/17A400
path: /usr/bin/xcodebuild
Languages:
Java: Not Found
Ruby:
version: 2.6.10
path: /usr/bin/ruby
npmPackages:
"@react-native-community/cli":
installed: 20.0.0
wanted: 20.0.0
react:
installed: 19.1.1
wanted: 19.1.1
react-native:
installed: 0.82.0
wanted: 0.82.0
react-native-macos: Not Found
npmGlobalPackages:
"*react-native*": Not Found
Android:
hermesEnabled: Not found
newArchEnabled: Not found
iOS:
hermesEnabled: true
newArchEnabled: true
Stacktrace or Logs
FAIL src/******.tsx
● Test suite failed to run
Cannot find module 'prettier' from 'node_modules/react-native/jest/setup.js'
at Resolver._throwModNotFoundError (node_modules/jest-resolve/build/resolver.js:427:11)
at Object.<anonymous> (node_modules/react-native/jest/setup.js:1:97)
MANDATORY Reproducer
https://github.com/wojtekmaj/react-native-crash-on-missing-prettier
Screenshots and Videos
No response