Run scala tests on Android

Question

(Sequel to this.) There's a Java library to which I have added patches for Android support. I would like to automate testing of the code, but in order to check if it runs properly on Android, I need to test it on Android. (Current progress here.) I've moved the main code into a "java" module, and created an "android" module to run the Android instrumented tests (tests that run on a device or emulator). Now, I'd really prefer to run all the normal tests again but on Android (so nobody has to rewrite all the tests and keep them up-to-date), by e.g. adding a line to the gradle file or creating a symbolic link, but so far I haven't found a gradle command to do it, and a symbolic link did nothing that I could see. Part of the problem, I think, is that the tests are in Scala. Is there a way to run Scala tests as instrumented tests on Android? (Or another way of equivalently solving the problem without a ton of recurring work?) The easiest probably-doable way that's occurred to me is to add a test in Android that manually calls the other tests (e.g. com.whatever.Tests.testThatThing();), but that requires maintenance as tests are created/removed, and I'm not sure there won't be problems with like, tests not being exported for external use or something.