# The Road to Altair: Pyrmont Testing and Prater Upgrade Scheduled

DevFeed: [The Road to Altair: Pyrmont Testing and Prater Upgrade Scheduled](<https://devfeed.tech/articles/finalized-no-28-16975.md>)

Original publisher: [Read original article](<https://blog.ethereum.org/en/2021/08/25/finalized-no-28>)

Author: Danny Ryan

Published: 2021-08-25T00:00:00Z

Content type: release

Language: en

Sources: [Ethereum Foundation Blog](<https://devfeed.tech/sources/ethereum-foundation-blog.md>)

Topics: [Testing](<https://devfeed.tech/topics/testing.md>), [releases](<https://devfeed.tech/topics/releases.md>), [Network](<https://devfeed.tech/topics/network.md>), [Code](<https://devfeed.tech/topics/code.md>)

Tags: [code](<https://devfeed.tech/tags/code.md>), [configuration](<https://devfeed.tech/tags/configuration.md>), [consensus](<https://devfeed.tech/tags/consensus.md>), [deprecated](<https://devfeed.tech/tags/deprecated.md>), [fork](<https://devfeed.tech/tags/fork.md>), [load](<https://devfeed.tech/tags/load.md>), [network](<https://devfeed.tech/tags/network.md>), [offline](<https://devfeed.tech/tags/offline.md>), [releases](<https://devfeed.tech/tags/releases.md>), [research-development](<https://devfeed.tech/tags/research-development.md>), [scheduled](<https://devfeed.tech/tags/scheduled.md>), [testing](<https://devfeed.tech/tags/testing.md>), [upgrade](<https://devfeed.tech/tags/upgrade.md>)

## AI overview

This developer update reports that the Pyrmont public testnet successfully upgraded to Altair and is undergoing scenario testing. It schedules the Prater testnet upgrade for September 2 at 12pm UTC, with the Altair mainnet launch targeted for the end of September if testing and the Prater upgrade are successful.

## Source excerpt

The Road to Altair edition 🛣⭐ tl;dr Pyrmont upgrade successful, scenario testing underway Prater upgrade scheduled for September 2, 12pm UTC Mainnet to follow...