# 1.99.0 pre-release testing

DevFeed: [1.99.0 pre-release testing](<https://devfeed.tech/articles/1-99-0-pre-release-testing-63455.md>)

Original publisher: [Read original article](<https://blog.rust-lang.org/inside-rust/2026/09/29/1.99.0-prerelease/>)

Author: Release automation

Published: 2026-09-29T00:00:00Z

Content type: release

Language: en

Sources: [Inside Rust Blog](<https://devfeed.tech/sources/inside-rust-blog.md>)

Topics: [release engineering](<https://devfeed.tech/topics/release-engineering.md>), [Release notes](<https://devfeed.tech/topics/release-notes.md>), [Beta channel](<https://devfeed.tech/topics/beta-channel.md>)

Tags: [2026](<https://devfeed.tech/tags/2026.md>), [pre-release](<https://devfeed.tech/tags/pre-release.md>), [rust](<https://devfeed.tech/tags/rust.md>), [testing](<https://devfeed.tech/tags/testing.md>)

## AI overview

Rust 1.99.0 is available as a pre-release for testing ahead of its scheduled October 1 release. Users can install it locally and provide feedback through the Rust internals thread or a GitHub issue about the pre-release process.

## Source excerpt

The 1.99.0 pre-release is ready for testing. The release is scheduled for October 1. Release notes can be found here. You can try it out locally by running: RUSTUP_DIST_SERVER=https://dev-static.rust-lang.org rustup update stable The index is https://dev-static.rust-lang.org/dist/2026-09-28/index.html. You can leave feedback on the internals thread. General feedback about our pre-release process is welcome on this GitHub issue.