[v3] ERR_REQUIRE_ESM with many libraries (react-use, emotion at least)

[ddolcimascolo]

Describe the bug

Hello,

Tests that were passing with vitest@2 are now failing when they use a library such as react-use or emotion (a dependency of MUI). In our test suite, it's like 90% of tests :/ The error is

Error: require() of ES Module /data/dev/vitest-v3-require-esm/node_modules/tslib/tslib.es6.mjs not supported.
Instead change the require of /data/dev/vitest-v3-require-esm/node_modules/tslib/tslib.es6.mjs to a dynamic import() which is available in all CommonJS modules.
 ❯ Object.<anonymous> node_modules/react-use/lib/factory/createReducer.js:3:15

I created a repo with an easy reproduction, really nothing weird except a component using react-use : https://github.com/ddolcimascolo/vitest-v3-require-esm

A few details on the environment

• Node 22
• Vite latest
• Vitest latest
• HappyDOM as the test environment

Anything I can do to help, just ask.

Thanks !

David

Reproduction

https://github.com/ddolcimascolo/vitest-v3-require-esm

System Info

System:
    OS: Linux 6.8 Linux Mint 22 (Wilma)
    CPU: (16) x64 11th Gen Intel(R) Core(TM) i7-11850H @ 2.50GHz
    Memory: 2.83 GB / 15.35 GB
    Container: Yes
    Shell: 5.2.21 - /bin/bash
  Binaries:
    Node: 22.11.0 - ~/.nvm/versions/node/v22.11.0/bin/node
    Yarn: 1.22.22 - ~/.nvm/versions/node/v22.11.0/bin/yarn
    npm: 10.9.0 - ~/.nvm/versions/node/v22.11.0/bin/npm
  Browsers:
    Chrome: 132.0.6834.83
  npmPackages:
    @vitejs/plugin-react: 4.3.4 => 4.3.4 
    vite: 6.0.7 => 6.0.7 
    vitest: 3.0.0 => 3.0.0

Used Package Manager

npm

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[ddolcimascolo]

Sorry I just noticed #7266 which is probably the same issue. My repro may help, though.

Feel free to close anyway if that's a dupe !