We don't need the default options to run this test.

This fixes errors when running a binary built with
--without-default-devices such:

  ERROR: qemu-system-s390x: Unknown device 'virtio-net-ccw' for bus 'virtual-css-bus'

Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20200129212345.20547-25-philmd@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 tests/acceptance/virtio_check_params.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tests/acceptance/virtio_check_params.py b/tests/acceptance/virtio_check_params.py
index 29e91bfa37..22792d4ec6 100755
--- a/tests/acceptance/virtio_check_params.py
+++ b/tests/acceptance/virtio_check_params.py
@@ -79,6 +79,7 @@ class VirtioMaxSegSettingsCheck(Test):
         logger.debug(mt)
         with QEMUMachine(self.qemu_bin) as vm:
             vm.set_machine(mt["name"])
+            vm.add_args('-nodefaults')
             for s in VM_DEV_PARAMS[dev_type_name]:
                 vm.add_args(s)
             try:
-- 
2.21.1