Ethereum to Shut Down Holesky Testnet Following Fusaka Upgrade

The Ethereum network will shut down the Holesky testnet, which has been operational for two years, following the completion of the Fusaka upgrade later this year. Key points include:

• Holesky was launched in 2023 to stress-test Ethereum's proof-of-stake system and became the largest public testnet.
• It supported major upgrades like Dencun and Pectra, aimed at reducing transaction costs and improving validator efficiency.
• Inactivity leaks occurred post-Pectra activation, causing delays and making it difficult for developers to test effectively.
• Hoodi, a new testnet introduced in March 2025, aims to resolve these issues while continuing to support validator and staking testing.
• Sepolia remains the main testnet for decentralized applications, and Ephemery provides quick-reset validator cycles every 28 days.

Currently, Ether (ETH) is trading at $4,380, stable over the past 24 hours.