TheVirusBulletin tests try to catch out anti-virus software with a variety of malicious programs including bots and worms known to be spreading online, file infectors, polymorphic and macro viruses.
In a statement, Joe Telafici, vice president of operations for McAfee Avert Labs, said VirusBulletin had not been using the most up to date version of VirusScan Enterprise at the time of testing.