Node.js v25.9.0 released!

[NewsBot]

Node.js v25.9.0 has been released.

Notable Changes

Test runner module mocking improvements

MockModuleOptions.defaultExport and MockModuleOptions.namedExports have been
consolidated into a single option MockModuleOptions.exports to align with user
expectations and other test runners.

A default property on MockModuleOptions.exports represents the default
export, and own enumerable properties are treated as named exports.

An automated migration is available to update user code:
https://github.com/nodejs/userland-migrations/tree/main/recipes/mock-module-exports

npx codemod @nodejs/mock-module-exports

Contributed by sangwook in #61727.

Other notable changes

• [312476cb84] - (SEMVER-MINOR) async_hooks: add using scopes to AsyncLocalStorage (Stephen Belanger) #61674
• [62d2cd473b] - (SEMVER-MINOR) cli: add --max-heap-size option (tannal) #58708
• [d0ebf0e44b] - (SEMVER-MINOR) crypto: add TurboSHAKE and KangarooTwelve Web Cryptography algorithms (Filip Skokan) #62183
• [f85b9d9fa8] - (SEMVER-MINOR) repl: add customizable error handling (Anna Henningsen) #62188
• [67b854d407] - (SEMVER-MINOR) repl: remove dependency on node:domain (Matteo Collina) #61227
• [966b700623] - (SEMVER-MINOR) sea: support code cache for ESM entrypoint in SEA (Joyee Cheung) #62158
• [[`e1f0…

Link: Release 2026-04-01, Version 25.9.0 (Current), @aduh95 · nodejs/node · GitHub