Defining Projects in Vitest
From the Vitest cheat sheet · Test Projects · verified Nov 2026
Defining Projects
Split tests into named projects with their own environment, include, and browser settings
typescript
export default defineConfig({
test: {
projects: [
{ test: { name: 'unit', include: ['src/**/*.unit.test.ts'], environment: 'node' } },
{ test: { name: 'dom', include: ['src/**/*.dom.test.ts'], environment: 'jsdom' } },
],
},
})
// vitest run -p unit📌 v5: inline projects inherit the root config by default
⚠️ Arrays merge, so a project's setupFiles add to the root ones
💡 Every project needs a unique name; set one on inline configs
🔍 Root-only options like reporters and coverage can't go in a project
projectsworkspaceconfig
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