diff --git a/.gitea/workflows/container.yml b/.gitea/workflows/container.yml
index 87176e3..559b558 100644
--- a/.gitea/workflows/container.yml
+++ b/.gitea/workflows/container.yml
@@ -77,6 +77,10 @@ jobs:
               httpd -k stop
             '
           docker run --rm --entrypoint php "${IMAGE}:${COMMIT_SHA}" -r '
+            if (PHP_VERSION_ID < 80512) {
+                fwrite(STDERR, "PHP 8.5.12 or newer is required for the php2shell fix.\n");
+                exit(1);
+            }
             if (ini_get("session.upload_progress.enabled")) {
                 fwrite(STDERR, "PHP session upload progress must be disabled.\n");
                 exit(1);