In Roblox Parasite Testing, you study strange creatures that infect people and change how they act. You observe their effects during research, but infection can spread quickly if you are not careful. Strange things may occur as the testing continues!
You can redeem codes for Credits and Levels in Parasite Testing to quickly begin earning progress and skip some of the grind. It takes effort to locate working codes, but we have already gathered them all, so you do not have to search!
All Codes for Parasite Testing List
Active Roblox Parasite Testing Codes (Working)
- MAPREVAMP – Redeem code for Freebies (NEW)
- RESTRICTED – Redeem code for Freebies (NEW)
- RESEARCH – Redeem code for Freebies (NEW)
- SUMMER – Redeem code for Freebies
- PUPPETEER – Redeem code for Freebies
- RIP ANT ACC – Redeem code for Freebies
- NEWUPDATE – Redeem code for Freebies
- WERE SORRY – Redeem code for Freebies
- ACOLYTE – Redeem code for Freebies
- 2KSERVER – Redeem code for Freebies
- 1MVISITS – Redeem code for 75 Credits and 25 Levels
- PUPPETEER – Redeem code for 5 Credits and 5 Levels
Find codes for a bunch of other games in our Roblox Games Codes page.
Expired Parasite Testing Codes (Not Working)
- 1KSERVER – Redeem code for Freebies
How to Redeem Parasite Testing Codes
To redeem codes in Roblox Parasite Testing, you will need to follow these steps:
- When you spawn, walk up to the Laptop with the Redeem Codes prompt on a metal shelf.
- Enter a working code in the Enter a code… text box and hit the green Submit button.
- You’ll get your free code rewards instantly if the code is still active.
- If not, let us know in the comments!
Be sure to use codes from our Parasite Testing list quickly, as they may expire soon.

Should a newly released code fail to work, consider exiting and then re-entering the game. This action transfers you to a different server, potentially with an updated version of the game where the code functions correctly.
How to Get More Parasite Testing Codes
To make sure you never miss new Parasite Testing codes, I recommend regularly checking the game’s official pages:
- Bookmark this page (press Ctrl + D) and check back for updates!
- Join the Parasite Testers Roblox Group
- Join the Parasite Testing Discord
Why Are Parasite Testing Codes Not Working?
Having trouble with a Parasite Testing code? Here’s some reasons why it may not be working:
- Check for Typos: Make sure you’ve typed or pasted the code correctly. Even a tiny mistake can invalidate it. Use this guide or the game’s official channels as your source for accurate codes.
- Expiration Date: Codes don’t last forever! Developers might announce when a code expires, but sometimes they disappear without warning. So, grab those goodies quickly!
- Capital Letters Matter: Some codes are picky about capital and lowercase letters. Make sure you match the code exactly.
- Server Hiccups: It’s rare, but sometimes a new code might not work right away on every server. Try logging out and back in, or hopping to a different server.
If you’ve done all this and the code still doesn’t work, it might be gone for good. But hey, leave a comment below if you find an expired code, and I’ll make sure the list is up-to-date.
When Are New Parasite Testing Codes Released?
Although Parasite Testers hasn’t officially stated when new codes drop, I’ve picked up on some trends based on past releases and what’s happening in the community:
- Major game updates usually mean new codes: Developers often toss in a few codes as a little extra something for players after big changes to the game.
- Holidays and special events: Keep an eye on the game’s social media or Discord – they might surprise you with codes during holidays, and big milestones.
- Community milestones: Sometimes, developers give out codes as a reward when the game hits certain goals, like a certain number of likes or players.
- Server hiccups or bugs: If the game has any downtime or annoying glitches, you might get lucky and see some codes pop up as an apology or compensation.
Those are all of the Roblox Parasite Testing codes we currently have listed. If you see one that we’re missing, please let us know in the comments so we can add it right away!
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