Like all other Gyms in Paldea, the Artazon Gym building itself is simply used for registering Gym challengers. The Gym Test and Gym battle are both conducted at other locations within Artazon.
The Artazon Gym Test is Sunflora Hide-and-Seek, which is initiated at the Sunflora Lawn. The player must find ten Sunflora hiding across Artazon in order to pass. After a Sunflora is found, it will follow the player until the end of the Gym Test. Sometimes, a Sunflora will battle the player upon being found.