diff --git a/parser_test.go b/parser_test.go
index 4232059..441194f 100644
--- a/parser_test.go
+++ b/parser_test.go
@@ -26,10 +26,6 @@ func not[T any](pred func(T) bool) func(T) bool {
 	return func(x T) bool { return !pred(x) }
 }
 
-func hasPrefix(prefix []byte) func([]byte) bool {
-	return func(b []byte) bool { return bytes.HasPrefix(b, prefix) }
-}
-
 func TestSlice(t *testing.T) {
 	assertParseFails := func(t rapid.TB, input []byte, p gigaparsec.Parser[byte, []byte]) (parseErr gigaparsec.ParseError) {
 		t.Helper()