diff --git a/src/lib.rs b/src/lib.rs
index 23e9181..a308a68 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -109,18 +109,18 @@ pub fn aes_256_gcm_encrypt(key: &[u8], nonce: &[u8], message: &[u8]) -> Result<V
 fn test128() {
     use aes_gcm::{aead::{Aead, Nonce, Payload}, Aes128Gcm, KeyInit};
     let knp = vec![
-        ([0; 16], [0; 12], &[] as &[u8], b"Hello World!" as &[u8]),
-        ([0; 16], [0; 12], &[1; 16], b"Hello World!" as &[u8]),
-        ([0; 16], [0; 12], &[1; 17], b"Hello World!" as &[u8]),
-        ([0; 16], [0; 12], &[1; 32], b"Hello World!" as &[u8]),
-        ([0; 16], [0; 12], &[1; 64], b"Hello World!" as &[u8]),
-        ([0; 16], [0; 12], &[1, 2, 3], b"Hello World!" as &[u8]),
+        ([1; 16], [0; 12], &[] as &[u8], b"Hello World!" as &[u8]),
+        ([2; 16], [0; 12], &[1; 16], b"Hello World!" as &[u8]),
+        ([3; 16], [0; 12], &[1; 17], b"Hello World!" as &[u8]),
+        ([4; 16], [0; 12], &[1; 32], b"Hello World!" as &[u8]),
+        ([5; 16], [0; 12], &[1; 64], b"Hello World!" as &[u8]),
+        ([6; 16], [0; 12], &[1, 2, 3], b"Hello World!" as &[u8]),
         ([1; 16], [0; 12], &[], b"Hello World!"),
-        ([0; 16], [1; 12], &[], b"Hello World!"),
+        ([7; 16], [1; 12], &[], b"Hello World!"),
         ([1; 16], [1; 12], &[], b"Hello World ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!"),
         ([1; 16], [1; 12], &[0; 129], b"Hello World ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!"),
         ([0xff; 16], [0; 12], &[], b"Hello World!"),
-        ([0; 16], [0xff; 12], &[], b"Hello World!"),
+        ([8; 16], [0xff; 12], &[], b"Hello World!"),
         ([0xff; 16], [0xff; 12], &[], b"Hello World ~~~~~~~~~~~~~~~~~\
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\
@@ -185,18 +185,18 @@ fn test128() {
 #[test]
 fn test192() {
     let knp = vec![
-        ([0; 24], [0; 12], &[] as &[u8], b"Hello World!" as &[u8]),
-        ([0; 24], [0; 12], &[1; 16], b"Hello World!" as &[u8]),
-        ([0; 24], [0; 12], &[1; 17], b"Hello World!" as &[u8]),
-        ([0; 24], [0; 12], &[1; 32], b"Hello World!" as &[u8]),
-        ([0; 24], [0; 12], &[1; 64], b"Hello World!" as &[u8]),
-        ([0; 24], [0; 12], &[1, 2, 3], b"Hello World!" as &[u8]),
+        ([1; 24], [0; 12], &[] as &[u8], b"Hello World!" as &[u8]),
+        ([2; 24], [0; 12], &[1; 16], b"Hello World!" as &[u8]),
+        ([3; 24], [0; 12], &[1; 17], b"Hello World!" as &[u8]),
+        ([4; 24], [0; 12], &[1; 32], b"Hello World!" as &[u8]),
+        ([5; 24], [0; 12], &[1; 64], b"Hello World!" as &[u8]),
+        ([6; 24], [0; 12], &[1, 2, 3], b"Hello World!" as &[u8]),
         ([1; 24], [0; 12], &[], b"Hello World!"),
-        ([0; 24], [1; 12], &[], b"Hello World!"),
+        ([8; 24], [1; 12], &[], b"Hello World!"),
         ([1; 24], [1; 12], &[], b"Hello World ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!"),
         ([1; 24], [1; 12], &[0; 129], b"Hello World ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!"),
         ([0xff; 24], [0; 12], &[], b"Hello World!"),
-        ([0; 24], [0xff; 12], &[], b"Hello World!"),
+        ([9; 24], [0xff; 12], &[], b"Hello World!"),
         ([0xff; 24], [0xff; 12], &[], b"Hello World ~~~~~~~~~~~~~~~~~\
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\
@@ -247,18 +247,18 @@ fn test192() {
 fn test256() {
     use aes_gcm::{aead::{Aead, Nonce, Payload}, Aes256Gcm, KeyInit};
     let knp = vec![
-        ([0; 32], [0; 12], &[] as &[u8], b"Hello World!" as &[u8]),
-        ([0; 32], [0; 12], &[1; 16], b"Hello World!" as &[u8]),
-        ([0; 32], [0; 12], &[1; 17], b"Hello World!" as &[u8]),
-        ([0; 32], [0; 12], &[1; 32], b"Hello World!" as &[u8]),
-        ([0; 32], [0; 12], &[1; 64], b"Hello World!" as &[u8]),
-        ([0; 32], [0; 12], &[1, 2, 3], b"Hello World!" as &[u8]),
+        ([1; 32], [0; 12], &[] as &[u8], b"Hello World!" as &[u8]),
+        ([2; 32], [0; 12], &[1; 16], b"Hello World!" as &[u8]),
+        ([3; 32], [0; 12], &[1; 17], b"Hello World!" as &[u8]),
+        ([4; 32], [0; 12], &[1; 32], b"Hello World!" as &[u8]),
+        ([5; 32], [0; 12], &[1; 64], b"Hello World!" as &[u8]),
+        ([6; 32], [0; 12], &[1, 2, 3], b"Hello World!" as &[u8]),
         ([1; 32], [0; 12], &[], b"Hello World!"),
-        ([0; 32], [1; 12], &[], b"Hello World!"),
+        ([7; 32], [1; 12], &[], b"Hello World!"),
         ([1; 32], [1; 12], &[], b"Hello World ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!"),
         ([1; 32], [1; 12], &[0; 129], b"Hello World ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!"),
         ([0xff; 32], [0; 12], &[], b"Hello World!"),
-        ([0; 32], [0xff; 12], &[], b"Hello World!"),
+        ([8; 32], [0xff; 12], &[], b"Hello World!"),
         ([0xff; 32], [0xff; 12], &[], b"Hello World ~~~~~~~~~~~~~~~~~\
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\