diff --git a/tlv493d/tlv493d_test.go b/tlv493d/tlv493d_test.go
index a445bc2..00d4002 100644
--- a/tlv493d/tlv493d_test.go
+++ b/tlv493d/tlv493d_test.go
@@ -52,7 +52,7 @@ func TestDev_String(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if s := d.String(); s != "TLV493D" {
+	if s := d.String(); s != "TLV493D{i2c:0x5e}" {
 		t.Fatal(s)
 	}
 	if err := d.Halt(); err != nil {