No Tests Found Android Studio 3.2

Invalidate caches and restart fixed this for me, always worth trying.

I've seen this happen when AS tries to run unit tests (test/ folder) instead of instrumentation tests (androidTest/ folder) or the package specification for the configuration is wrong.

1. Make sure that when you right click a folder to run the package of tests, and select "Run", that the icon has a little droid on it to indicate it's treating the folder as android tests:

   

   If it doesn't, continue to step 2. If it does, skip to step 3.

2. Sometimes AS gets confused and thinks Android tests are unit tests. To fix that, click the Run Configuration icon in the toolbar and select "Edit Configurations..."

   

   You should see an option for Android Tests:

   

   Select this and copy that configuration, then on the right, change it from "All in Module" to "All in Package"

3. Make sure the configuration for the package tests specifies the full package you want to test:

   

Once your configuration is correctly set up to run Android tests and explicitly indicate the full and correct package of tests to run, it should work.

Hope that helps!

Fixed in Android Studio version 3.2.1