diff --git a/tests/zfs-tests/tests/functional/no_space/enospc_rm.ksh b/tests/zfs-tests/tests/functional/no_space/enospc_rm.ksh
index 9258b2568233..065abc75977e 100755
--- a/tests/zfs-tests/tests/functional/no_space/enospc_rm.ksh
+++ b/tests/zfs-tests/tests/functional/no_space/enospc_rm.ksh
@@ -50,9 +50,9 @@ log_must zfs set mountpoint=$TESTDIR $TESTPOOL/$TESTFS
 log_must zfs set compression=off $TESTPOOL/$TESTFS
 
 log_note "Writing files until ENOSPC."
-log_mustnot_expect "No space left on device" fio --name=test --ioengine=libaio \
-    --fallocate=none --iodepth=4 --rw=write --bs=1M --size=1G --numjobs=4 \
-    --directory=$TESTDIR/ --group_reporting
+log_mustnot_expect "No space left on device" fio --name=test \
+    --fallocate=none --rw=write --bs=1M --size=1G --numjobs=4 \
+    --sync=1 --directory=$TESTDIR/ --group_reporting
 
 log_must rm $TESTDIR/test.*
 log_must test -z "$(ls -A $TESTDIR)"