You're testing a new Ruby client. That sounds like an exciting project!

To better assist you, could you please provide more details about the client you're working on? Here are some questions to consider:

1. **What is the purpose of the client**? Is it a command-line tool, a library for other programs to use, or a GUI application?
2. **What features does the client have**? Are there any specific functionalities that you'd like to test (e.g., API calls, data processing, user authentication)?
3. **Have you written unit tests and integration tests**? If so, what testing frameworks are you using (e.g., RSpec, Minitest, Test::Unit)?

Once I have a better understanding of your client and its requirements, I can offer more tailored guidance on how to test it effectively.

To get started, here are some general tips for testing Ruby clients:

1. **Use a testing framework**: Choose a popular testing framework like RSpec or Minitest to write unit tests and integration tests.
2. **Test individual components**: Break down your client into smaller components (e.g., classes, methods) and test each one independently.
3. **Use mocking libraries**: Tools like `rspec-mocks` or `mocha` can help you isolate dependencies and make testing more efficient.
4. **Test edge cases**: Think about scenarios that might cause issues in your client, such as invalid input or network errors.
5. **Test for usability**: Ensure that the client is easy to use by testing its user interface (if applicable) and documenting any issues you encounter.

Let me know if there's anything specific I can help with!