diff --git a/.github/workflows/rust-ci.yml b/.github/workflows/rust-ci.yml
index dd2b76290..1103ad40e 100644
--- a/.github/workflows/rust-ci.yml
+++ b/.github/workflows/rust-ci.yml
@@ -385,28 +385,6 @@ jobs:
             /opt/ghc
           sudo apt-get remove -y docker.io docker-compose podman buildah
 
-      # Ensure brew includes this fix so that brew's shellenv.sh loads
-      # cleanly in the Codex sandbox (it is frequently eval'd via .zprofile
-      # for Brew users, including the macOS runners on GitHub):
-      #
-      # https://github.com/Homebrew/brew/pull/21157
-      #
-      # Once brew 5.0.5 is released and is the default on macOS runners, this
-      # step can be removed.
-      - name: Upgrade brew
-        if: ${{ startsWith(matrix.runner, 'macos') }}
-        shell: bash
-        run: |
-          set -euo pipefail
-          brew --version
-          git -C "$(brew --repo)" fetch origin
-          git -C "$(brew --repo)" checkout main
-          git -C "$(brew --repo)" reset --hard origin/main
-          export HOMEBREW_UPDATE_TO_TAG=0
-          brew update
-          brew upgrade
-          brew --version
-
       # Some integration tests rely on DotSlash being installed.
       # See https://github.com/openai/codex/pull/7617.
       - name: Install DotSlash