diff --git a/test/units/testsuite-64.sh b/test/units/testsuite-64.sh
index 81edb0ab7a..0e598cc6b3 100755
--- a/test/units/testsuite-64.sh
+++ b/test/units/testsuite-64.sh
@@ -1159,6 +1159,10 @@ testcase_mdadm_lvm() {
     helper_check_device_units
 }
 
+# Disable the mdmonitor service, since it fails if there's no valid email address
+# configured in /etc/mdadm.conf, which just unnecessarily pollutes the logs
+systemctl list-unit-files mdmonitor.service >/dev/null && systemctl mask --runtime mdmonitor.service
+
 udevadm settle
 udevadm control --log-level debug
 lsblk -a