---
title: "selfTestRequest(with:completion:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrbaseclustersmokecoalarm/selftestrequest(with:completion:)"
---

# selfTestRequest(with:completion:)

## Declaration

```swift
func selfTestRequest(with params: MTRSmokeCOAlarmClusterSelfTestRequestParams?, completion: @escaping @Sendable ((any Error)?) -> Void)
```

```swift
func selfTestRequest(with params: MTRSmokeCOAlarmClusterSelfTestRequestParams?) async throws
```