On an open device, you can inject a passing or failing fingerprint or face ID, depending on the device model. Face ID is available on iPhone X or later and is not currently supported on Android devices. To learn more, including about known limitations, the testing workflow, error messages, device prerequisites, and special device considerations, see Fingerprint injection | Simulate sensor authentication.
Important: For this option to work as expected, the app to be tested must have been installed with sensor instrumentation enabled and stay in the front during testing.
Watch this short video to see how you can inject a fingerprint.
To inject a fingerprint or face ID:
- Open the application you want to test and make sure it stays in the foreground.
- On the device toolbar, click the fingerprint icon
or face ID icon 
. - In the Fingerprint injection or Face ID injection dialog box, do one of the following:
- To test a successful fingerprint or face ID, click Passed.
- To test an invalid fingerprint or face ID, click Failed.