diff --git a/tests/zfs-tests/tests/functional/zvol/zvol_stress/zvol_stress.ksh b/tests/zfs-tests/tests/functional/zvol/zvol_stress/zvol_stress.ksh
index 883d9984be43..3431d33d97d0 100755
--- a/tests/zfs-tests/tests/functional/zvol/zvol_stress/zvol_stress.ksh
+++ b/tests/zfs-tests/tests/functional/zvol/zvol_stress/zvol_stress.ksh
@@ -151,6 +151,7 @@ for DISK in $DISKS ; do
 	log_must zinject -d $DISK -f 10 -e io -T write $TESTPOOL
 done
 log_must dd if=/dev/zero of=$ZVOL_DEVDIR/$TESTPOOL/testvol1 bs=512 count=50
+sync_pool $TESTPOOL
 log_must zinject -c all
 
 # We should see write errors