Water testing can help investigate a leak when performed appropriately, but uncontrolled soaking may introduce water in ways that do not reflect the original problem. It can also make separate sources difficult to distinguish.
What to do next
Ask the professional performing the test which area will be isolated, how observations will be recorded, and what would count as a positive finding. Keep occupants informed and protect vulnerable interiors. A test result should support a diagnosis, not merely produce water indoors.
Related Perkins guidance
Contact Perkins Roofing to discuss your roof and the appropriate next step.