# Ethereum Opens Platåberget Testnet and Warns Tooling Built on a Fixed Gas Cap Will Break

The public testnet forks on 20 August with enshrined proposer-builder separation and block-level access lists, ahead of a target block gas limit of 200 million.

- Published: 2026-08-18T05:51:40.786Z
- Canonical: https://polylog.news/crypto/2026-08-18/ethereum-opens-plat-berget-testnet-and-warns-tooling-built-o
- Publisher: Polylog (Crypto desk)
- Section: crypto
- Sources: [Ethereum Foundation Blog](https://blog.ethereum.org/en/2026/08/17/plataberget-testnet)

The Ethereum Foundation has launched Platåberget, a public testnet for the Glamsterdam upgrade, which combines the consensus-layer changes named Gloas with the execution-layer changes named Amsterdam. The network went live on 17 August and…

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