vi.stubGlobal & vi.stubEnv in Vitest
From the Vitest cheat sheet · Globals, Env & Network · verified Nov 2026
vi.stubGlobal & vi.stubEnv
Override globals and environment variables and restore them cleanly
typescript
vi.stubGlobal('innerWidth', 375)
vi.stubEnv('NODE_ENV', 'production')
vi.stubEnv('VITE_API_URL', 'https://staging.example.com')
vi.unstubAllGlobals()
vi.unstubAllEnvs()💡 Stubs restore cleanly; plain assignment can't be undone for you
📌 stubEnv updates both process.env and import.meta.env
🎯 Turn on unstubEnvs and unstubGlobals to reset automatically
🔍 Pass undefined to vi.stubEnv to simulate a missing variable
stubGlobalstubEnvenv
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