Fedora CoreOS 45 Test Week will begin on September 21, 2026, allowing community members to test container-optimized images built from Fedora 45 content prior to their release. This event comes after the Fedora 45 Beta, released on September 15, and focuses on new features like systemd-oomd with zram swap support and native Butane YAML configuration in Ignition. Participants will download test images, run them on various hardware, and report results to ensure a smooth final release expected on November 19, 2026. The Test Week serves as a quality gate for Fedora CoreOS, which is an immutable, image-based operating system designed for cloud and bare-metal deployments

Fedora CoreOS 45 Test Week Starts September 21, 2026

Fedora CoreOS 45 Test Week kicks off Monday, September 21, 2026, inviting the community to test container-optimized FCOS images built from Fedora 45 content before they reach the testing and stable streams. The event follows the Fedora 45 Beta release on September 15 and targets two major changes: systemd-oomd with zram swap support, and native Butane YAML configuration in Ignition. Participants download test images, run cases on hardware or virtual machines, and log pass/fail results through the CoreOS issue-tracking workflow. This quality-gate effort sits between the beta and the expected November 19 final release, following Fedora's familiar six-month cadence.

Fedora CoreOS 45 Test Week Starts September 21, 2026 @ Linux Compatible