As the Android ecosystem embraced automated testing more and more, with the introduction of helpful libraries like Espresso, Robolectric, and support for unit testing built directly into Gradle, Dropbox kept up with these changes by moving from the heavy reliance on E2E tests towards more and more unit tests, filling out the bottom layer of the previously inverted testing pyramid. Robolectric’s interoperability with AndroidX Test has allowed us to move many of our instrumentation tests to JVM-based unit tests, making it even easier to meet our test coverage goals. For these cases, we use a web based test case management tool to maintain a complete set of manual test cases, and a third party testing service to execute the tests prior to each release.