diff --git a/types/submessages_test.go b/types/submessages_test.go
new file mode 100644
index 00000000..336ce1cd
--- /dev/null
+++ b/types/submessages_test.go
@@ -0,0 +1,34 @@
+package types
+
+import (
+	"encoding/json"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestReplySerialization(t *testing.T) {
+	reply1 := Reply{
+		GasUsed: 4312324,
+		ID:      75,
+		Result: SubMsgResult{
+			Ok: &SubMsgResponse{
+				Events: []Event{
+					{
+						Type: "hi",
+						Attributes: []EventAttribute{
+							{
+								Key:   "si",
+								Value: "claro",
+							},
+						},
+					},
+				},
+				Data: []byte{0x3f, 0x00, 0xaa, 0x5c, 0xab},
+			},
+		},
+	}
+	serialized, err := json.Marshal(&reply1)
+	require.NoError(t, err)
+	require.Equal(t, `{"gas_used":4312324,"id":75,"result":{"ok":{"events":[{"type":"hi","attributes":[{"key":"si","value":"claro"}]}],"data":"PwCqXKs="}}}`, string(serialized))
+}