diff --git a/test/test_iaes256_cbc.py b/test/test_iaes256_cbc.py
index 58fa69eeb7372a8f7da58eca443941c56140f3f4..396a7517a912511b8cba1a61ad7619b7644b07c5 100644
--- a/test/test_iaes256_cbc.py
+++ b/test/test_iaes256_cbc.py
@@ -17,7 +17,7 @@ decrypt = crypto.decryptIAES256CBCFast(key_id, enc, len(enc), 2048)
 print (decrypt)
 
 
-if bytes(s, "utf-8") != decrypt:
+if bytes(s, "utf-8") == decrypt:
     print ("TEST 1. Encode/Decode IAES256 CBC FAST done")
 else:
     print ("TEST 1. Encode/Decode IAES256 CBC FAST faild")