diff --git a/src/utils.rs b/src/utils.rs
index 3fbaa7f..1f90729 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -124,6 +124,11 @@ mod tests {
         assert_eq!(address_and_port_as_string("192.168.0.1", 27015), "192.168.0.1:27015");
     }
 
+    #[test]
+    fn u8_lower_upper_test() {
+        assert_eq!(u8_lower_upper(171), (11, 10));
+    }
+
     #[test]
     fn get_u8_test() {
         let data = [72];