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# getTestDiagnosisKeys(completionHandler:)

Requests the temporary exposure keys, including the current key, used by this device for testing.

```
func getTestDiagnosisKeys(completionHandler: @escaping @Sendable ([ENTemporaryExposureKey]?, (any Error)?) -> Void)
```

```
func testDiagnosisKeys() async throws -> [ENTemporaryExposureKey]
```

## Parameters

`completionHandler`

The completion handler that the framework calls when the method completes.

## Discussion

> Important:
> You can call this method from synchronous code using a completion handler, as shown on this page, or you can call it as an asynchronous method that has the following declaration:
> 
> ```swift
> func testDiagnosisKeys() async throws -> [ENTemporaryExposureKey]
> ```
> 
> For information about concurrency and asynchronous code in Swift, see <doc://com.apple.documentation/documentation/Swift/calling-objective-c-apis-asynchronously>.

> Important:
> This method is available in iOS 12.5, and in iOS 13.5 and later.

Every time this method is called, the framework will request the user to authorize the action.

> Warning:
> This method is only for developers while testing, and requires a special entitlement that is not allowed in the App Store. It’s only intended for testing without needing to wait 24 hours for a key to be released.

---

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