diff --git a/tests/qemu-iotests/205 b/tests/qemu-iotests/205
index e7b2eae51d59f698286732c233542180e6f24902..31b2f5707a5da897e3c75c55a2307e724e1d45b9 100755
--- a/tests/qemu-iotests/205
+++ b/tests/qemu-iotests/205
@@ -153,4 +153,4 @@ class TestNbdServerRemove(iotests.QMPTestCase):
 
 
 if __name__ == '__main__':
-    iotests.main()
+    iotests.main(supported_fmts=['generic'])
diff --git a/tests/qemu-iotests/208 b/tests/qemu-iotests/208
index 18f59ada946ef6da7a2f00d9ba82e62318a1261e..1e202388dcc3db8f13f889685532556d1310b95f 100755
--- a/tests/qemu-iotests/208
+++ b/tests/qemu-iotests/208
@@ -22,6 +22,8 @@
 
 import iotests
 
+iotests.verify_image_format(supported_fmts=['generic'])
+
 with iotests.FilePath('disk.img') as disk_img_path, \
      iotests.FilePath('disk-snapshot.img') as disk_snapshot_img_path, \
      iotests.FilePath('nbd.sock') as nbd_sock_path, \