Diesel pumps are tested weekly under no-flow conditions. Electric pumps are tested monthly under no-flow conditions.
All fire pumps are required to be tested annually underflow.
Want to learn more? Check out NFPA’s website: https://www.nfpa.org/News-and-Research/Publications-and-media/Blogs-Landing-Page/NFPA-Today/Blog-Posts/2022/09/09/Weekly-or-Monthly-No-Flow-Churn-Tests-of-Fire-Pumps