Firebase Test Lab, a cloud-based app test infrastructure, allows you to test your app on a variety of devices and configurations so that you can get a better understanding of how it will perform in real users' hands. Test Lab uses real production devices that are running in a Google data centre to test your app. These devices have updated APIs and customizable locale settings that allow you to road-test your application on real-world hardware and configurations. Run your test using our available tools. Test Lab can take up to several minutes depending on the size of the test matrix. You can view the results of your tests in the Firebase console after they are completed. You can create your test matrix using one of our integrated tools. Select a set devices, OS versions, locales and screen orientations. Modify your test to run in Test Lab if necessary. Your app can be built and packaged, then uploaded to Firebase.