Home » Shiba Inu (SHIB) » Shibarium » Shiba Inu Dev Invites Builders To Back To Shibarium Shibarium’s testnet is back up, slowly but surely waking up DeFi activity across the Layer-2. After a relaunch & full re-sync of Shibarium’s ‘Puppynet’, this crucial testnet is back up & running after a two-year hiatus. At block height 15.16 million, new transactions are finally landing on the testnet with immediate success.