The Test Bloon is a type of Bloon in Bloons TD 6. It is exclusive to Sandbox mode and is intended for testing a tower's attacks, abilities, and other effects with Bloon targeting. It has the lowest priority bracket for strong targeting, even lower than the Red Bloon. It cannot have Camo, Fortified, or Regrow Bloon properties.
It has almost unlimited health, but leaking it does not drain any lives and popping it grants no cash. It can be afflicted with debuffs and can be insta-killed by certain methods, such as Druid of the Jungle and Legend of the Night, but it cannot be shrunk by the Bloon Master Alchemist. Despite having a huge RBE, the Test Bloon has no effect on Avatar of Wrath and Pet Rabbit's damage scaling.
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