Ethereum Foundation initiates Holešky network shutdown after completing Fusaka upgrade
Key Takeaways
- The Ethereum Foundation is decommissioning Holešky after completing the Fusaka upgrade.
- Holešky enabled the testing of PeerDAS and partial data verification, reducing bandwidth requirements for validators and benefiting L2 networks.
Share this article
The Ethereum Foundation has begun winding down Holešky, an Ethereum testnet launched in 2023 for large-scale validator and upgrade testing.
In a post on X, the Foundation confirmed that Holešky will undergo planned node shutdowns two weeks after the Fusaka upgrade finalizes. Operators are advised to migrate testing to Hoodi and Sepolia, which now serve as Ethereum’s primary testnets for staking and application development.
Holešky hosted major upgrade trials, including Dencun, Pectra, and most recently Fusaka—a network upgrade introducing PeerDAS to reduce bandwidth use for validators and improve scalability for layer-2s.
Following Fusaka’s completion, the testnet reached its planned end-of-life and will no longer receive client or infrastructure support. Its successor, Hoodi, launched in March 2025, provides a fresh validator environment, while Sepolia remains the preferred network for developers.
Holešky’s sunset marks Ethereum’s shift toward purpose-built, shorter-lived testnets that serve specific upgrade milestones before decommissioning.
Disclaimer: The content of this article solely reflects the author's opinion and does not represent the platform in any capacity. This article is not intended to serve as a reference for making investment decisions.
You may also like
a16z Annual Report: The 17 Most Exciting Web3 Ideas for 2026
Stablecoins will become the infrastructure of Internet finance, AI agents will gain on-chain identity and payment capabilities, and the advancement of privacy technologies, verifiable computation, and compliance frameworks will drive the crypto industry from pure trading speculation towards building decentralized networks with lasting value.

Morning Brief | a16z Crypto releases annual report; crypto startup LI.FI completes $29 million financing; Trump says the rate cut is too small
A summary of important market events on December 11.

Trend Research: The "Blockchain Revolution" is Underway, Remain Bullish on Ethereum
The integration trend in the crypto market and Ethereum's value capture.

Interest Rate Cuts Implemented, Why Are Assets Acting "Rebellious" Collectively?
