restoreRandom experimental 5.2.0+

Type: boolean
Default: false

Should Vitest automatically call vi.useRealRandom() before each test. Then each test starts with the real Math.random, crypto and node:crypto functions, also if an earlier test called vi.useFakeRandom() and did not restore them.

vitest.config.js

import { defineConfig } from 'vitest/config'

export default defineConfig({
  test: {
    restoreRandom: true,
  },
})

Vitest restores the functions before the beforeEach hooks, so a beforeEach hook can call vi.useFakeRandom(). A call at the top level of a file or in beforeAll has no effect in the tests.

Vitest restores only the global functions and node:crypto. A module that kept a reference to the fake functions when it loaded, for example lodash after a setup file called vi.useFakeRandom(), still returns seeded values.

This option cannot be used together with fakeRandom.enableGlobally.

restoreRandom experimental 5.2.0+ ​

restoreRandom experimental 5.2.0+