Coconino County Emergency Management is conducting a test of the emergency notification system on Memorial Day. The test will help ensure that the system is up to date. County officials are urging residents to sign-up to receive emergency notifications. The test will be conducted between 9 a.m. and 10 a.m. During the test residents should receive a message verifying they have been entered into the system. To sign up, log onto coconino.az.gov/ready.