diff --git a/hdkeychain/extendedkey_test.go b/hdkeychain/extendedkey_test.go
index c94d321..00699d6 100644
--- a/hdkeychain/extendedkey_test.go
+++ b/hdkeychain/extendedkey_test.go
@@ -857,7 +857,7 @@ func TestErrors(t *testing.T) {
 		{
 			name: "pubkey not on curve",
 			key:  "xpub661MyMwAqRbcFtXgS5sYJABqqG9YLmC4Q1Rdap9gSE8NqtwybGhePY2gZ1hr9Rwbk95YadvBkQXxzHBSngB8ndpW6QH7zhhsXZ2jHyZqPjk",
-			err:  errors.New("pubkey isn't on secp256k1 curve"),
+			err:  errors.New("invalid square root"),
 		},
 		{
 			name:      "unsupported version",