Firefighters seen going into the Blackpool Tower Dungeons were not responding to reports of an incident, the fire service said.
Kitted-out crews equipped with hose reels cordoned off an area outside the Tower this morning, while fire engines were parked on Bank Hey Street.
But a Twoer spokesman said the service had fitted new fire extinguishers and were on site to test them - not because of an emergency.
A fire service spokesman confirmed it had received no reports of a fire at the famous building.
He said: "There is no incident and it is not on our systems."