Since 2011, CPS Energy has been able to send out mass alerts to customers when widespread power outages occurred, coordinated by zip code.
But now their system is more sophisticated, and will notify individual customers when power outages more than 15 minutes occur at their specific address.
CPS spokeswoman Yvonne Casanova said the system will continue to be tested through the end of February. Over the next week or so, during regular business hours, customers who have signed up for alerts on the CPS website should receive a test message.