diff --git a/test/iscsi_tgt/fio/fio.sh b/test/iscsi_tgt/fio/fio.sh
index 24d0b0c13..23ccb3ffc 100755
--- a/test/iscsi_tgt/fio/fio.sh
+++ b/test/iscsi_tgt/fio/fio.sh
@@ -83,7 +83,7 @@ $rpc_py add_initiator_group $INITIATOR_TAG $INITIATOR_NAME $NETMASK
 # Create a RAID-0 bdev from two malloc bdevs
 malloc_bdevs="$($rpc_py construct_malloc_bdev $MALLOC_BDEV_SIZE $MALLOC_BLOCK_SIZE) "
 malloc_bdevs+="$($rpc_py construct_malloc_bdev $MALLOC_BDEV_SIZE $MALLOC_BLOCK_SIZE)"
-$rpc_py construct_raid_bdev -n raid0 -s 64 -r 0 -b "$malloc_bdevs"
+$rpc_py construct_raid_bdev -n raid0 -z 64 -r 0 -b "$malloc_bdevs"
 bdev=$( $rpc_py construct_malloc_bdev 1024 512 )
 # "raid0:0" ==> use raid0 blockdev for LUN0
 # "1:2" ==> map PortalGroup1 to InitiatorGroup2
diff --git a/test/iscsi_tgt/lvol/iscsi_lvol.sh b/test/iscsi_tgt/lvol/iscsi_lvol.sh
index d9b89eed7..4e7bdd7fa 100755
--- a/test/iscsi_tgt/lvol/iscsi_lvol.sh
+++ b/test/iscsi_tgt/lvol/iscsi_lvol.sh
@@ -50,7 +50,7 @@ for i in $(seq 1 $NUM_LVS); do
 		# construct RAID bdev and put its name in $bdev
 		malloc_bdevs="$($rpc_py construct_malloc_bdev $MALLOC_BDEV_SIZE $MALLOC_BLOCK_SIZE) "
 		malloc_bdevs+="$($rpc_py construct_malloc_bdev $MALLOC_BDEV_SIZE $MALLOC_BLOCK_SIZE)"
-		$rpc_py construct_raid_bdev -n raid0 -s 64 -r 0 -b "$malloc_bdevs"
+		$rpc_py construct_raid_bdev -n raid0 -z 64 -r 0 -b "$malloc_bdevs"
 		bdev="raid0"
 	else
 		# construct malloc bdev and put its name in $bdev
diff --git a/test/nvmf/target/fio.sh b/test/nvmf/target/fio.sh
index c70a3754e..d35f20a65 100755
--- a/test/nvmf/target/fio.sh
+++ b/test/nvmf/target/fio.sh
@@ -21,7 +21,7 @@ malloc_bdevs+="$($rpc_py construct_malloc_bdev $MALLOC_BDEV_SIZE $MALLOC_BLOCK_S
 # Create a RAID-0 bdev from two malloc bdevs
 raid_malloc_bdevs="$($rpc_py construct_malloc_bdev $MALLOC_BDEV_SIZE $MALLOC_BLOCK_SIZE) "
 raid_malloc_bdevs+="$($rpc_py construct_malloc_bdev $MALLOC_BDEV_SIZE $MALLOC_BLOCK_SIZE)"
-$rpc_py construct_raid_bdev -n raid0 -s 64 -r 0 -b "$raid_malloc_bdevs"
+$rpc_py construct_raid_bdev -n raid0 -z 64 -r 0 -b "$raid_malloc_bdevs"
 
 $rpc_py nvmf_subsystem_create nqn.2016-06.io.spdk:cnode1 -a -s SPDK00000000000001
 for malloc_bdev in $malloc_bdevs; do