Choose a testing team that is interested in your product and wants to stay on the same wavelength.
Typically, such guys ask a lot of questions about the business and its solutions: What do you expect from the quality of the product? Who is the target audience? Which solutions should a product bring for its users? For example, when we set a first call with our clients, our tech lead and business development manager study all the information and prepare a list of questions to get as many answers as we can. The more we know about the product, the better services we can provide.