diff --git a/tests/qemu-iotests/042 b/tests/qemu-iotests/042
index c3c3ca8d02..16b2fdbd5e 100755
--- a/tests/qemu-iotests/042
+++ b/tests/qemu-iotests/042
@@ -38,7 +38,7 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
 . ./common.rc
 . ./common.filter
 
-_supported_fmt qcow2 qcow qed vmdk
+_supported_fmt qcow2 qcow qed
 _supported_proto file
 _supported_os Linux