diff --git a/test/TEST-04-FULL-SYSTEMD/create-root.sh b/test/TEST-04-FULL-SYSTEMD/create-root.sh
index 86ad4491..bfec5bf1 100755
--- a/test/TEST-04-FULL-SYSTEMD/create-root.sh
+++ b/test/TEST-04-FULL-SYSTEMD/create-root.sh
@@ -4,6 +4,7 @@ for x in 64-lvm.rules 70-mdadm.rules 99-mount-rules; do
     > "/etc/udev/rules.d/$x"
 done
 rm -f -- /etc/lvm/lvm.conf
+modprobe btrfs
 udevadm control --reload
 set -e
 # save a partition at the beginning for future flagging purposes