diff --git a/tests/qemu-iotests/137 b/tests/qemu-iotests/137
index e5e30de2fa..eb91e517d7 100755
--- a/tests/qemu-iotests/137
+++ b/tests/qemu-iotests/137
@@ -39,7 +39,7 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
 . ./common.qemu
 
 _supported_fmt qcow2
-_supported_proto generic
+_supported_proto file
 _supported_os Linux