Ethereum Foundation Winds Down Holešky Testnet Post-Fusaka Upgrade

Ethereum Foundation Winds Down Holešky Testnet

The Ethereum Foundation is shutting down the Holešky test network after successfully completing the Fusaka upgrade. Launched in 2023, Holešky was pivotal for large-scale validator and upgrade testing, particularly for the trial of PeerDAS and partial data verification, which helped reduce bandwidth for validators and supported layer-2 networks.

Key Developments

• The closure of Holešky follows the Fusaka upgrade, which introduced PeerDAS, enhancing scalability and efficiency for layer-2 solutions.
• Operators are encouraged to transition to Hoodi and Sepolia, the primary testnets now supporting Ethereum's staking and application development.
• The decommissioning underscores Ethereum's strategic move towards short-lived, specialized testnets that focus on specific upgrade milestones.

According to an announcement on X, Holešky will experience planned node shutdowns two weeks post-Fusaka completion. Its successor, Hoodi, launched in March 2025, offers a new environment for validators, while Sepolia remains favored by developers.

With Holešky's sunset, Ethereum continues to innovate with purpose-built testnets to efficiently manage network upgrades and development.