Mrs Tolley said all prison staff will now be trained in the "tactical use of pepper spray, while the strict regulations surrounding its use will be streamlined for quicker approval".
"It should also be noted that the majority of staff and all prison managers interviewed during the trial were opposed to pepper spray being carried on officers' belts."
The trial took place in ten prisons, with pepper spray being deployed once and approved for use, but not implemented, on three other occasions.
"Pepper spray is another important tool for Corrections officers," Mrs Tolley said.
"The National-led Government has already improved conditions for staff by introducing stab-resistant vests, batons and spit-hoods for those working in high-risk situations, and alongside training in de-escalation techniques this is making our prisons safer."