diff --git a/test/vhost/integrity/integrity_vm.sh b/test/vhost/integrity/integrity_vm.sh
index 7a4b3a4a6..ccb01cead 100755
--- a/test/vhost/integrity/integrity_vm.sh
+++ b/test/vhost/integrity/integrity_vm.sh
@@ -43,7 +43,7 @@ for fs in $fs; do
 		fio --name="integrity" --bsrange=4k-512k --iodepth=128 --numjobs=1 --direct=1 \
 		--thread=1 --group_reporting=1 --rw=randrw --rwmixread=70 \
 		--filename=/mnt/${dev}dir/test_file --verify=md5 --do_verify=1 \
-		--verify_backlog=1024 --fsync_on_close=1 --runtime=20 --time_based=1 --size=1G
+		--verify_backlog=1024 --fsync_on_close=1 --runtime=20 --time_based=1 --size=512m
 
 		# Print out space consumed on target device
 		df -h /dev/$dev