diff --git a/data_psi_test.go b/data_psi_test.go
index a452222..ec51114 100644
--- a/data_psi_test.go
+++ b/data_psi_test.go
@@ -2,12 +2,22 @@ package astits
 
 import (
 	"bytes"
+	"encoding/hex"
+	"strings"
 	"testing"
 
 	"github.com/asticode/go-astikit"
 	"github.com/stretchr/testify/assert"
 )
 
+func hexToBytes(in string) []byte {
+	o, err := hex.DecodeString(strings.ReplaceAll(in, "\n", ""))
+	if err != nil {
+		panic(err)
+	}
+	return o
+}
+
 var psi = &PSIData{
 	PointerField: 4,
 	Sections: []*PSISection{