There is no requirement for a mechanical test run in NFPA 20.
NFPA 20 requires a field acceptance test:
"1-6.2 The complete unit shall be field acceptance tested for proper performance in accordance with the provisions of this this standard."
Fire pump experts, including the manufacturers and installer, typically do acceptance tests. Insurers and Authorities Having Jurisdiction are typically present as well.
Why would you want to do a mechanical test run as well as a field acceptance test?