diff --git a/vlib/crypto/scrypt/scrypt_test.v b/vlib/crypto/scrypt/scrypt_test.v
index a1020b5da6..1c5c9dcd15 100644
--- a/vlib/crypto/scrypt/scrypt_test.v
+++ b/vlib/crypto/scrypt/scrypt_test.v
@@ -203,6 +203,9 @@ struct ScryptTestData {
 	expected_result []u8
 }
 
+// The scrypt test vectors are taken from
+// [RFC7914](https://datatracker.ietf.org/doc/html/rfc7914#section-12)
+// section 12.
 const scrypt_test_cases = [
 	ScryptTestData{
 		name:            'test case 1'