diff --git a/.ci/test.sh b/.ci/test.sh
index ead72cfa6b9..443c95fa411 100755
--- a/.ci/test.sh
+++ b/.ci/test.sh
@@ -4,4 +4,5 @@ set -e
 
 python3 -c "from PIL import Image"
 
+python3 -m pip list installed
 python3 -bb -m pytest -v -x -W always --cov PIL --cov Tests --cov-report term --cov-report xml Tests/test_image.py $REVERSE
diff --git a/.github/workflows/test-docker.yml b/.github/workflows/test-docker.yml
index 37b8403b646..91b57ae431a 100644
--- a/.github/workflows/test-docker.yml
+++ b/.github/workflows/test-docker.yml
@@ -30,6 +30,7 @@ jobs:
       fail-fast: false
       matrix:
         docker: [
+          centos-stream-9-amd64,
           ubuntu-22.04-jammy-amd64,
           ubuntu-24.04-noble-amd64,
         ]