diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 97591d4c19..25dff134a7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,6 +26,9 @@ jobs:
       - name: Verify Bazel clippy flags match Cargo workspace lints
         run: python3 .github/scripts/verify_bazel_clippy_lints.py
 
+      - name: Test Codex package builder
+        run: python3 -m unittest discover -s scripts/codex_package -p 'test_*.py'
+
       - name: Setup pnpm
         uses: pnpm/action-setup@a8198c4bff370c8506180b035930dea56dbd5288 # v5
         with: