If the test environment has some other child processes running (like a
storage daemon that provides a FUSE export), then "wait" will never
finish.  Use wait=yes _cleanup_qemu instead.

(We need to discard the output so there is no change to the reference
output.)

Signed-off-by: Max Reitz <mreitz@redhat.com>
---
 tests/qemu-iotests/091 | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tests/qemu-iotests/091 b/tests/qemu-iotests/091
index 0874fa84c8..7d23a6862b 100755
--- a/tests/qemu-iotests/091
+++ b/tests/qemu-iotests/091
@@ -96,7 +96,8 @@ _send_qemu_cmd $h2 'qemu-io disk flush' "(qemu)"
 _send_qemu_cmd $h2 'quit' ""
 _send_qemu_cmd $h1 'quit' ""
 
-wait
+wait=yes _cleanup_qemu >/dev/null
+
 echo "Check image pattern"
 ${QEMU_IO} -c "read -P 0x22 0 4M" "${TEST_IMG}" | _filter_testdir | _filter_qemu_io
 
-- 
2.23.0