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Vitest · Function

defineConfig

defineConfig creates a Vitest configuration. Put test options inside its test property, such as include for selecting test files.

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Syntax

defineConfig({ test: { ... } })

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  • configDefaults
  • mergeConfig
  • vitest/config
  • vite.config.ts
  • vitest.config.ts
  • test.include

Source: Configuring Vitest | Vitest. Checked 2026-11-03.