Unit Test Enhancement and Debugging Assistance

I'm seeking an Android Development expert with strong Kotlin skills to help improve my unit test coverage from 50% to 85%. Currently, I'm using JUnit as my testing framework, focusing primarily on business logic.

Key Responsibilities:
- Writing unit test cases for existing code
- Debugging and ensuring tests run successfully
- Increasing code coverage to at least 85%

I have mock data available for use, so experience with clean architecture and mocking is crucial.