Steps:

1. Add dependency to Mockito version 2.x in your gradle (at the time of writing this text the latest version is 2.7.22):

   testCompile "org.mockito:mockito-core:$versions.mockito"
   

2. Create a file in test resources with name org.mockito.plugins.MockMaker:

3. Add next line in this file:

   mock-maker-inline