diff --git a/test/units/testsuite-12.sh b/test/units/testsuite-12.sh
index e64f321273..8c22a8b031 100755
--- a/test/units/testsuite-12.sh
+++ b/test/units/testsuite-12.sh
@@ -3,6 +3,8 @@
 set -eux
 set -o pipefail
 
+echo "g adm - - -" | systemd-sysusers -
+
 U=/run/systemd/system/test12.socket
 cat >$U <<EOF
 [Unit]