diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index e86e059..545ab35 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -87,6 +87,13 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v6
 
+      - name: Install a pinned Docker Compose version
+        run: |
+          sudo curl -SL https://github.com/docker/compose/releases/download/v2.39.4/docker-compose-linux-x86_64 \
+            -o /usr/libexec/docker/cli-plugins/docker-compose
+          sudo chmod +x /usr/libexec/docker/cli-plugins/docker-compose
+          docker compose version
+
       - name: Prepare docker secrets
         run: |
           [ -f docker/postgresql.secret ] || echo -n "changeit" > docker/postgresql.secret