There are a couple official test accounts:

• guser: Test user account. Name stands for "guest user".
• ggroup: Test group account. Name stands for "guest group".
• testgroupacct: Another test group account. Originally created to test usernames with length > 8 characters.
• gstaff: Test staff account. Name stands for "guest staff".
• testopstaff: Test opstaff account.
• ofc: Test sorried account.