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Ethereum’s biggest testnet, Holešky, will shut down as part of a planned switch to the Hoodi testnet. Holešky will be shut down two weeks after the Fusaka network upgrade is completed.

ETH Foundation suggested that the upgrade take place sometime in the second half of September. It stated that the client, testing, and infrastructure teams would no longer support Holešky after this point.

Fusaka must be launched well in advance of November, as Ethereum core developers plan to introduce it on the mainnet at that time. When Holešky was first launched in September 2023, its mission was to test validator operations and staking infrastructure. According to the foundation, “the network fulfilled its function by allowing thousands of validators to test protocol upgrades, such as the Dencun network upgrade and most recently, Pectra.”.

The action demonstrates the dedication of the Ethereum community to enhancing each network layer.  The foundation recently hailed UX as one of Ethereum’s most promising leverage prospects for the upcoming six to twelve months Although scalability and decentralization via staking have long been top concerns,

Holešky experienced “extensive inactivity leaks” in early 2025, which led to a long exit queue even though it had reached its “planned end-of-life date.”. The foundation introduced Hoodi in March to offer a new testing environment free of those problems, even though it eventually recovered.

Moving all of Holešky’s staking operators and infrastructure to Hoodi, which is already compatible with the Pectra update and will enable future protocol upgrades, such as the impending Fusaka fork, is one of the next steps, according to the foundation.

Ethereum Foundation advised moving to Sepolia as the “recommended testnet” for testing decentralized apps and smart contracts.

Fusaka, also known as Fulu-Osaka, is Ethereum’s next major hard fork. It is planned for early November and aims to enhance rollups’ data access by more effectively allocating data availability workloads among network validators.