---
title: maxConcurrency | Config
outline: deep
---

# maxConcurrency

- **Type**: `number`
- **Default**: `5`
- **CLI**: `--max-concurrency=10`, `--maxConcurrency=10`

A number of tests that are allowed to run at the same time marked with `test.concurrent`.

Test above this limit will be queued to run when available slot appears.
