The Closed Beta Party was a party in Club Penguin Universe that began on March 4, 2018 and ended on March 9, 2018 in which the day Open Beta Party started. This party could only be attended if a user won a key from a giveaway on Discord, or a live stream giveaway by Evan. The party featured Club Penguin Universe's first free party item being the Closed Beta Hat. A list of users who participated in this party can be found on the List of Closed Beta Testers.
- This is the first party that appeared on Club Penguin Universe.
- A mascot was created during this party called "false".
- This was one of the smallest and shortest parties in Club Penguin Universe.