diff --git a/test/iscsi_tgt/qos/qos.sh b/test/iscsi_tgt/qos/qos.sh
index 660f32e1a..4604b8a06 100755
--- a/test/iscsi_tgt/qos/qos.sh
+++ b/test/iscsi_tgt/qos/qos.sh
@@ -9,7 +9,10 @@ function check_qos_works_well() {
 	local enable_limit=$1
 	local iops_limit=$2/1000
 	local retval=0
-	local read_iops=$($fio_py 8192 64 randread 5 | grep "\(read: IOPS=\|write: IOPS=\)" |
+
+	$fio_py 8192 64 randread 5 > fio.txt
+
+	local read_iops=$(cat fio.txt | grep "\(read: IOPS=\|write: IOPS=\)" |
 		awk -F, '{print $1}' | awk -F= '{print $2}' | tr -d [k])
 	if [ $enable_limit = true ]; then
 		retval=$(echo "$iops_limit*0.9 < $read_iops && $read_iops < $iops_limit*1.01" | bc)
@@ -68,7 +71,7 @@ sleep 1
 iscsiadm -m discovery -t sendtargets -p $TARGET_IP:$ISCSI_PORT
 iscsiadm -m node --login -p $TARGET_IP:$ISCSI_PORT
 
-trap "iscsicleanup; killprocess $pid; exit 1" SIGINT SIGTERM EXIT
+trap "iscsicleanup; rm -f fio.txt; killprocess $pid; exit 1" SIGINT SIGTERM EXIT
 
 # Limit the I/O rate by RPC, then confirm the observed rate matches.
 $rpc_py set_bdev_qos_limit_iops Malloc0 $IOPS_LIMIT
@@ -84,6 +87,7 @@ check_qos_works_well true $IOPS_LIMIT
 echo "I/O rate limiting tests successful"
 
 iscsicleanup
+rm -f fio.txt
 $rpc_py delete_target_node 'iqn.2016-06.io.spdk:Target1'
 
 rm -f ./local-job0-0-verify.state