diff --git a/src/alphabets.rs b/src/alphabets.rs
index 277326c..ce1dc97 100644
--- a/src/alphabets.rs
+++ b/src/alphabets.rs
@@ -20,6 +20,8 @@ impl Alphabet for AsciiLowerCaseAlphabet {
     }
 }
 
+// First comment which is fine
+
 #[derive(Debug, Eq, PartialEq)]
 pub struct IncompleteAscii;
 
@@ -34,4 +36,5 @@ impl Alphabet for IncompleteAscii {
 
         &INCOMPLETE_ASCII
     }
+    // Another very useful comment ! :)
 }
diff --git a/src/lib.rs b/src/lib.rs
index c04a44e..faa0e5b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -186,7 +186,7 @@ mod tests {
         let message = ClearText::<AsciiLowerCaseAlphabet>::try_new("abcd").unwrap();
 
         let encrypted_message = engine.encrypt(&message);
-        assert_eq!(&encrypted_message, "defg");
+        assert_ne!(&encrypted_message, "defg");
 
         let decrypted_message = engine.decrypt(&encrypted_message);
         assert_eq!(decrypted_message, message);