This is my opinion on this...
I would not bother with this type of a client. This sounds to me like an employer-employee relationship.
A VA is an expert in her/his field. Clients who come to you for assistance need to recognize that you are the one with the skills to help them succeed.
This client is unsure of your skills and that could be for any number of reasons but I'm guessing that he is looking at a VA-client relationship in terms of employee-employer. And that is what you don't need to contend with. It's a 'red flag'.
I do not feel that these types of clients are worth the time. And I understand that you want to work and it might be a paying opportunity that you need to get started. But my experience has been that if a client is testing the waters
on his terms then you may have a tough time gaining trust over time.
Who is this client who determines when and if you get paid? You are the business owner and you determine whether you are paid.
If you decide to go with the client, you can do one of three things:
1) Refuse nicely, to take the test. Explain that you are a business owner and an expert in your field. Explain that he wouldn't give a plumber a test when he called upon this service person to work on his pipes. If he hired an attorney, he would not give the attorney a test. Your job is no different. You are offering a service that your contract and your terms will provide for his satisfaction of the work.
2) You can take the tests and get paid. (Might set a precedent for future work assignments)
3) You can take the tests, not pass and not get paid.
I suggest the first, which may cost you the work but will gain respect and confidence to know that you do not need to be tested. You know what you are doing and do not need to prove that to anyone.
Janine