diff --git a/coins/monero/wallet/src/tests/extra.rs b/coins/monero/wallet/src/tests/extra.rs
index 8dcd51f6..2f331e61 100644
--- a/coins/monero/wallet/src/tests/extra.rs
+++ b/coins/monero/wallet/src/tests/extra.rs
@@ -105,15 +105,13 @@ fn padding_only_max_size() {
 #[test]
 fn padding_only_exceed_max_size() {
   let buf: Vec<u8> = vec![0; MAX_TX_EXTRA_PADDING_COUNT + 1];
-  let extra = Extra::read::<&[u8]>(&mut buf.as_ref()).unwrap();
-  assert!(extra.0.is_empty());
+  Extra::read::<&[u8]>(&mut buf.as_ref()).unwrap_err();
 }
 
 #[test]
 fn invalid_padding_only() {
   let buf: Vec<u8> = vec![0, 42];
-  let extra = Extra::read::<&[u8]>(&mut buf.as_ref()).unwrap();
-  assert!(extra.0.is_empty());
+  Extra::read::<&[u8]>(&mut buf.as_ref()).unwrap_err();
 }
 
 #[test]
@@ -137,8 +135,7 @@ fn extra_nonce_only_wrong_size() {
   let mut buf: Vec<u8> = vec![0; 20];
   buf[0] = 2;
   buf[1] = 255;
-  let extra = Extra::read::<&[u8]>(&mut buf.as_ref()).unwrap();
-  assert!(extra.0.is_empty());
+  Extra::read::<&[u8]>(&mut buf.as_ref()).unwrap_err();
 }
 
 #[test]
@@ -158,8 +155,7 @@ fn pub_key_and_padding() {
 fn pub_key_and_invalid_padding() {
   let mut buf: Vec<u8> = PUB_KEY_BYTES.to_vec();
   buf.extend([0, 1]);
-  let extra = Extra::read::<&[u8]>(&mut buf.as_ref()).unwrap();
-  assert_eq!(extra.0, vec![ExtraField::PublicKey(pub_key())]);
+  Extra::read::<&[u8]>(&mut buf.as_ref()).unwrap_err();
 }
 
 #[test]
@@ -185,8 +181,7 @@ fn extra_mysterious_minergate_only_wrong_size() {
   let mut buf: Vec<u8> = vec![0; 20];
   buf[0] = 222;
   buf[1] = 255;
-  let extra = Extra::read::<&[u8]>(&mut buf.as_ref()).unwrap();
-  assert!(extra.0.is_empty());
+  Extra::read::<&[u8]>(&mut buf.as_ref()).unwrap_err();
 }
 
 #[test]