Try this

Author: jrfnl

.github/workflows/test.yml

@@ -200,6 +200,8 @@ jobs:
         with:
           composer-options: ${{ matrix.php == '8.5' && '--ignore-platform-req=php+' || '' }}
           custom-cache-suffix: $(date -u "+%Y-%m")
+        env:
+          COMPOSER_AUTH: '{"github-oauth": {"github.com": "${{ secrets.GITHUB_TOKEN }}"}}'
 
       - name: Grab PHPUnit version
         id: phpunit_version
@@ -322,6 +324,8 @@ jobs:
         with:
           # Bust the cache at least once a month - output format: YYYY-MM.
           custom-cache-suffix: $(date -u "+%Y-%m")
+        env:
+          COMPOSER_AUTH: '{"github-oauth": {"github.com": "${{ secrets.GITHUB_TOKEN }}"}}'
 
       - name: Grab PHPUnit version
         id: phpunit_version