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Vitest · Function

mergeConfig

mergeConfig combines shared Vite or Vitest settings with project-specific options. Use it when a separate project config needs to reuse a shared configuration.

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Syntax

mergeConfig(baseConfig, projectConfig)

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  • defineConfig
  • defineProject
  • vitest.config.ts
  • vite.config.ts
  • test.environment
  • test.exclude

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