I have a Android Clean Architecture project write in Kotlin with 3 modules:
You can use the inline mocking method by default, by changing your Gradle dependency from the normal Mockito dependency:
compile "org.mockito:mockito-core:$mockito_version"
... to the following:
compile "org.mockito:mockito-inline:$mockito_version"
This way you won't have to rely on activating inline mocking with the "file in the resources folder" method, which I have found to be flaky sometimes.