What type of license is required for TESTING purposes only, as an external QA service provider

I would like to clarify whether an External Quality Assurance (QA) service provider for Video Game developers requires a FMOD license in this context. Specifically, we do not develop, distribute, or commercially release any products using FMOD. Our role is limited strictly to testing builds provided by our clients, who are the original developers and license holders.

Could you please confirm whether a separate license is required for this type of usage, or if coverage under our clients’ licenses is sufficient?
Also, if there are any specific terms, conditions, or limitations we should be aware of regarding QA and testing activities?

You do not require a license, only the developer does. There are no specific terms, conditions, or limitations wrt QA testing.