diff --git a/.gitlab/ci/gitlab.images.yml b/.gitlab/ci/gitlab.images.yml
index fd2e89c..ee5a408 100644
--- a/.gitlab/ci/gitlab.images.yml
+++ b/.gitlab/ci/gitlab.images.yml
@@ -67,7 +67,9 @@ gitlab-slim-ruby:
   stage: gitlab
   variables:
     OS: 'debian:bullseye-slim'
-    RUBY: '3.0'
+  parallel:
+    matrix:
+      - RUBY: ['3.0', '3.1', '3.2']
 
 # Used by GitLab's workhorse tests
 gitlab-workhorse: