Update test_issue31.py

Author: auxten

tests/test_issue31.py

@@ -39,7 +39,7 @@ def payload():
     # calculate md5 of the result
     hash_out = hashlib.md5(res.bytes()).hexdigest()
     print("output length: ", len(res))
-    if hash_out != "423570bd700ba230ccd2b720b7976626":
+    if hash_out != "626be2713f7a26b266d7160f7172ab43":
         print(res.bytes().decode("utf-8"))
         raise Exception(f"md5 not match {hash_out}")
     used_time = time.time() - now