Less typing: let's use imgfmt by default if user doesn't specify
neither -f nor --image-opts.

Signed-off-by: Vladimir Sementsov-Ogievskiy <v.sementsov-og@mail.ru>
---
 tests/qemu-iotests/iotests.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index 8cdb381f2a..02601162d6 100644
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -231,6 +231,8 @@ def ordered_qmp(qmsg, conv_keys=True):
     return qmsg
 
 def qemu_img_create(*args):
+    if '-f' not in args and '--image-opts' not in args:
+        args = ['-f', imgfmt] + list(args)
     return qemu_img('create', *args)
 
 def qemu_img_measure(*args):
-- 
2.35.1