Concurrent Tests in Vitest
From the Vitest cheat sheet · Test Structure · verified Nov 2026
Concurrent Tests
Run tests inside a file in parallel and opt individual tests out
typescript
describe.concurrent('api', () => {
test('users', async ({ expect }) => { /* ... */ })
test('posts', async ({ expect }) => { /* ... */ })
})
test.concurrent('runs in parallel', async ({ expect }) => {})
test('stays serial', { concurrent: false }, async () => {})📌 Use the context expect in concurrent tests so snapshots map right
⚠️ v5 removed test.sequential; use { concurrent: false } instead
🔍 Synchronous tests still run one by one even when marked concurrent
💡 maxConcurrency (default 5) caps how many run at once
concurrentparallelshuffle
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