diff --git a/test/nvmf/host/fio.sh b/test/nvmf/host/fio.sh
index 2f854dc47..d953736a9 100755
--- a/test/nvmf/host/fio.sh
+++ b/test/nvmf/host/fio.sh
@@ -58,8 +58,8 @@ if [ $RUN_NIGHTLY -eq 1 ]; then
 	# Test fio_plugin as host with nvme lvol backend
 	bdfs=$(iter_pci_class_code 01 08 02)
 	$rpc_py construct_nvme_bdev -b Nvme0 -t PCIe -a $(echo $bdfs | awk '{ print $1 }') -i $NVMF_FIRST_TARGET_IP
-	$rpc_py construct_lvol_store Nvme0n1 lvs_0
-	get_lvs_free_mb lvs_0
+	ls_guid=$($rpc_py construct_lvol_store Nvme0n1 lvs_0)
+	get_lvs_free_mb $ls_guid
 	$rpc_py construct_lvol_bdev -l lvs_0 lbd_0 $free_mb
 	$rpc_py nvmf_subsystem_create nqn.2016-06.io.spdk:cnode2 -a -s SPDK00000000000001
 	$rpc_py nvmf_subsystem_add_ns nqn.2016-06.io.spdk:cnode2 lvs_0/lbd_0
@@ -69,11 +69,11 @@ if [ $RUN_NIGHTLY -eq 1 ]; then
 	$rpc_py delete_nvmf_subsystem nqn.2016-06.io.spdk:cnode2
 
 	# Test fio_plugin as host with nvme lvol nested backend
-	$rpc_py construct_lvol_store lvs_0/lbd_0 lvs_n_0
-	get_lvs_free_mb lvs_n_0
+	ls_nested_guid=$($rpc_py construct_lvol_store lvs_0/lbd_0 lvs_n_0)
+	get_lvs_free_mb $ls_nested_guid
 	$rpc_py construct_lvol_bdev -l lvs_n_0 lbd_nest_0 $free_mb
 	$rpc_py nvmf_subsystem_create nqn.2016-06.io.spdk:cnode3 -a -s SPDK00000000000001
-	$rpc_py nvmf_subsystem_add_ns nqn.2016-06.io.spdk:cnode3 lbd_nest_0/lvs_n_0
+	$rpc_py nvmf_subsystem_add_ns nqn.2016-06.io.spdk:cnode3 lvs_n_0/lbd_nest_0
 	$rpc_py nvmf_subsystem_add_listener nqn.2016-06.io.spdk:cnode3 -t rdma -a $NVMF_FIRST_TARGET_IP -s 4420
 	LD_PRELOAD=$PLUGIN_DIR/fio_plugin /usr/src/fio/fio $PLUGIN_DIR/example_config.fio --filename="trtype=RDMA adrfam=IPv4 \
 	traddr=$NVMF_FIRST_TARGET_IP trsvcid=4420 ns=1"
@@ -81,7 +81,7 @@ if [ $RUN_NIGHTLY -eq 1 ]; then
 
 	sync
 	# Delete lvol_bdev and destroy lvol_store.
-	$rpc_py destroy_lvol_bdev lbd_nest_0/lvs_n_0
+	$rpc_py destroy_lvol_bdev lvs_n_0/lbd_nest_0
 	$rpc_py destroy_lvol_store -l lvs_n_0
 	$rpc_py destroy_lvol_bdev lvs_0/lbd_0
 	$rpc_py destroy_lvol_store -l lvs_0