diff --git a/kupyna512/src/lib.rs b/kupyna512/src/lib.rs
index da4df891..b52159ef 100644
--- a/kupyna512/src/lib.rs
+++ b/kupyna512/src/lib.rs
@@ -5,7 +5,6 @@ mod sub_units;
 const STATE_SIZE: usize = 1024;
 const HASH_SIZE: usize = 512;
 
-const MAX_MESSAGE_LENGTH: usize = 18446744073709551615;
 
 fn pad_message(message: &[u8], msg_len_bits: usize, state_size: usize) -> Vec<u8> {
     let round_msg_len = message.len() * 8;
@@ -58,9 +57,6 @@ pub fn hash(message: Vec<u8>, length: Option<usize>) -> Result<Vec<u8>, &'static
     let mut message = message;
     let message_length: usize;
     if let Some(len) = length {
-        if len > MAX_MESSAGE_LENGTH {
-            return Err("Message is too long");
-        }
         if len > message.len() * 8 {
             return Err("Message length is less than the provided length");
         }
@@ -78,9 +74,6 @@ pub fn hash(message: Vec<u8>, length: Option<usize>) -> Result<Vec<u8>, &'static
         message_length = len;
 
     } else {
-        if message.len() * 8 > MAX_MESSAGE_LENGTH {
-            return Err("Message is too long");
-        }
         message_length = message.len() * 8;
     }
 
diff --git a/kupyna512/src/main.rs b/kupyna512/src/main.rs
deleted file mode 100644
index 552e0bfd..00000000
--- a/kupyna512/src/main.rs
+++ /dev/null
@@ -1,10 +0,0 @@
-use kupyna512;
-
-fn main() {
-    let message = b"Hello, World!".to_vec();
-    let _message_length = 0;
-
-    let hash_code = kupyna512::hash(message, None).unwrap();
-
-    println!("{:02X?}", hash_code);
-}
\ No newline at end of file
diff --git a/kupyna512/src/tests/mod.rs b/kupyna512/src/tests/mod.rs
index 5071554b..8d3aa901 100644
--- a/kupyna512/src/tests/mod.rs
+++ b/kupyna512/src/tests/mod.rs
@@ -1,3 +1,5 @@
 mod padding_tests;
 mod blocking_tests;
 mod hashing_tests;
+
+mod full_test;
\ No newline at end of file