# class: WorkerInfo
* since: v1.10
* langs: js

`WorkerInfo` contains information about the worker that is running tests and is available to worker-scoped fixtures. `WorkerInfo` is a subset of [TestInfo] that is available in many other places.

## property: WorkerInfo.config
* since: v1.10
- type: <[ConfigInWorker]>

Processed configuration from the [configuration file](../test-configuration.md).


## property: WorkerInfo.parallelIndex
* since: v1.10
- type: <[int]>

The index of the worker between `0` and `workers - 1`. It is guaranteed that workers running at the same time have a different `parallelIndex`. When a worker is restarted, for example after a failure, the new worker process has the same `parallelIndex`.

Also available as `process.env.TEST_PARALLEL_INDEX`. Learn more about [parallelism and sharding](../test-parallel.md) with Playwright Test.


## property: WorkerInfo.project
* since: v1.10
- type: <[ProjectInWorker]>

Processed project configuration from the [configuration file](../test-configuration.md).


## property: WorkerInfo.workerIndex
* since: v1.10
- type: <[int]>

The unique index of the worker process that is running the test. When a worker is restarted, for example after a failure, the new worker process gets a new unique `workerIndex`.

Also available as `process.env.TEST_WORKER_INDEX`. Learn more about [parallelism and sharding](../test-parallel.md) with Playwright Test.
