Cardano Incentivized Testnet is now undergoing a major upgrade and perhaps even an extension, as Shelley Incentivized Testnet rewards ran out, unoficial vote is going on as to if Shelley Incentivized Testnet should transform info more long-lived, more generic Cardano Incentivized Testnet. The informal part of the vote is for pool operators who are a major requirement for the network to keep running to keep their nodes up even without being paid incentives... that is taking place right now!
However! Formal vote using on-chain governance will take place later, that will require the network operators to upgrade to Jormungandr 0.9.0, this version of Jormungandr node was until yesterday not network compatible with 0.8.x releases, that has changed during period between 20-Jun-2020 and 21-Jun-2020, now Jormungandr 0.9.0-rc1-2715361c is able to communicate with 0.8.19 version of Jormungandr, this version however still doesn't support voting,