--- /dev/null
+#!/usr/bin/env bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+# shellcheck disable=SC2016
+set -eux
+set -o pipefail
+
+at_exit() {
+ rm -f /run/credstore/udev.*
+ rm -f /run/udev/udev.conf.d/*
+ rm -f /run/udev/rules.d/*
+ rm -rf /run/systemd/system/systemd-udev-load-credentials.service.d
+}
+
+trap at_exit EXIT
+
+mkdir -p /run/credstore
+cat > /run/credstore/udev.conf.50-testme <<EOF
+udev_log=debug
+EOF
+cat > /run/credstore/udev.rules.50-testme <<EOF
+SUBSYSTEM=="net", OPTIONS="log_level=debug"
+EOF
+
+systemctl edit systemd-udev-load-credentials.service --stdin --drop-in=50-testme.conf <<EOF
+[Service]
+LoadCredential=udev.conf.50-testme
+LoadCredential=udev.rules.50-testme
+EOF
+
+systemctl restart systemd-udev-load-credentials.service
+
+diff /run/credstore/udev.conf.50-testme /run/udev/udev.conf.d/50-testme.conf
+diff /run/credstore/udev.rules.50-testme /run/udev/rules.d/50-testme.rules