diff --git a/.github/workflows/phpunit-pgsql.yml b/.github/workflows/phpunit-pgsql.yml
index 24508acc4a..7a742ca6f6 100644
--- a/.github/workflows/phpunit-pgsql.yml
+++ b/.github/workflows/phpunit-pgsql.yml
@@ -97,7 +97,7 @@ jobs:
           persist-credentials: false
           submodules: true
           repository: nextcloud/server
-          ref: ${{ matrix.server-versions }}
+          ref: 'carl/optimize-cacheentry'
 
       - name: Checkout app
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2