ST. MARYS — On Tuesday evening, the city of St. Marys Electric Department will be conducting tests on equipment at the Tomlinson Substation and making necessary upgrades. As a result, the St. Marys Square will have an outage lasting 15 to 20 minutes and residents on North Street, near the funeral home, will be out of power for about an hour. Such outages are expected to occur after 10 p.m. Testing will start around 8 p.m. and last eight to nine hours. No other outages are expected, although brief outages could occur.