diff --git a/chain/beacon/drand/drand_test.go b/chain/beacon/drand/drand_test.go
index e2819f4e9..a65f4399b 100644
--- a/chain/beacon/drand/drand_test.go
+++ b/chain/beacon/drand/drand_test.go
@@ -24,7 +24,7 @@ func TestPrintGroupInfo(t *testing.T) {
 	})
 	chain, err := cg.FetchChainInfo(nil)
 	assert.NoError(t, err)
-	err = chain.ToJSON(os.Stdout)
+	err = chain.ToJSON(os.Stdout, nil)
 	assert.NoError(t, err)
 }