diff --git a/thirdparty/testutil/gen.go b/thirdparty/testutil/gen.go
index 9212b4d08..fc9e0ef45 100644
--- a/thirdparty/testutil/gen.go
+++ b/thirdparty/testutil/gen.go
@@ -9,6 +9,7 @@ import (
 	"testing"
 
 	u "gx/ipfs/Qmb912gdngC1UWwTkhuW8knyRbcWeu5kqkxBpveLmW8bSr/go-ipfs-util"
+	cid "gx/ipfs/QmcTcsTvfaeEBRFo1TkFgT8sRmgi1n1LTZpecfVP8fzpGD/go-cid"
 	peer "gx/ipfs/QmfMmLGoKzCHDN7cGgk64PJr4iipzidDRME8HABSJqvmhC/go-libp2p-peer"
 	ci "gx/ipfs/QmfWDLQjGjVe4fr5CoztYW2DYYjRysMJrFe1RCsXLPTf46/go-libp2p-crypto"
 
@@ -50,6 +51,14 @@ func RandPeerID() (peer.ID, error) {
 	return peer.ID(h), nil
 }
 
+func RandCidV0() (*cid.Cid, error) {
+	buf := make([]byte, 16)
+	if _, err := io.ReadFull(u.NewTimeSeededRand(), buf); err != nil {
+		return &cid.Cid{}, err
+	}
+	return cid.NewCidV0(buf), nil
+}
+
 func RandPeerIDFatal(t testing.TB) peer.ID {
 	p, err := RandPeerID()
 	if err != nil {