diff --git a/src/decode.rs b/src/decode.rs
index 80ac041..7aa2d87 100644
--- a/src/decode.rs
+++ b/src/decode.rs
@@ -1,3 +1,5 @@
+#[allow(non_snake_case)] // supprimer le warning snake case (quand les noms de variables ont des majuscules)
+#[derive(Debug)] 
 pub struct Instruction {
     pub value : u64,
 
@@ -26,6 +28,7 @@ pub struct Instruction {
     pub imm21_1_signed : i32,
 }
 
+#[allow(non_snake_case)]
 pub fn decode(val : u64) -> Instruction {
 
     let value = val;
diff --git a/src/print.rs b/src/print.rs
index d4651ba..2435951 100644
--- a/src/print.rs
+++ b/src/print.rs
@@ -260,16 +260,16 @@ pub fn print(ins: Instruction, pc: i32) -> String { //TODO pc should be u64
 
 
 #[cfg(test)]
-mod Test {
+mod test {
     use crate::{print, decode};
 
     #[test]
-    fn test1() {
-        let sub = decode::decode(0b01000001000010001000111000110011);
-        let add = decode::decode(0b00000001000010001000111000110011);
-        let xor = decode::decode(0b00000001000010001100111000110011);
-        let slr = decode::decode(0b00000001000010001101111000110011);
-        let sra = decode::decode(0b01000001000010001101111000110011);
+    fn test_op() {
+        let sub = decode::decode(0b0100000_10000_10001_000_11100_0110011);
+        let add = decode::decode(0b0000000_10000_10001_000_11100_0110011);
+        let xor = decode::decode(0b0000000_10000_10001_100_11100_0110011);
+        let slr = decode::decode(0b0000000_10000_10001_101_11100_0110011);
+        let sra = decode::decode(0b0100000_10000_10001_101_11100_0110011);
 
         assert_eq!("sub r28, r17, r16", print::print(sub, 0));
         assert_eq!("xor r28, r17, r16", print::print(xor, 0));
@@ -278,4 +278,11 @@ mod Test {
         assert_eq!("add r28, r17, r16", print::print(add, 0));
 
     }
+
+    #[test]
+    fn test_opi() {
+        let addi = decode::decode(0b0000000000_10001_000_11100_0010011);
+        assert_eq!("addi x28, x17, 0", print::print(addi, 0));
+    }
+
 }
\ No newline at end of file