diff --git a/swap/tests/e2e.rs b/swap/tests/e2e.rs
index e8260f95..352aa8f4 100644
--- a/swap/tests/e2e.rs
+++ b/swap/tests/e2e.rs
@@ -33,7 +33,7 @@ async fn happy_path() {
     // this xmr value matches the logic of alice::calculate_amounts i.e. btc *
     // 10_000 * 100
     let xmr_to_swap = xmr_btc::monero::Amount::from_piconero(1_000_000_000_000);
-    let xmr_alice = xmr_to_swap * xmr_btc::monero::Amount::from_piconero(10);
+    let xmr_alice = xmr_to_swap * 10;
     let xmr_bob = xmr_btc::monero::Amount::from_piconero(0);
 
     let alice_multiaddr: Multiaddr = "/ip4/127.0.0.1/tcp/9876"
@@ -121,7 +121,7 @@ async fn alice_punishes_if_bob_never_acts_after_fund() {
     let bob_xmr_starting_balance = xmr_btc::monero::Amount::from_piconero(0);
 
     let alice_btc_starting_balance = bitcoin::Amount::ZERO;
-    let alice_xmr_starting_balance = xmr_to_swap * xmr_btc::monero::Amount::from_piconero(10);
+    let alice_xmr_starting_balance = xmr_to_swap * 10;
 
     let alice_multiaddr: Multiaddr = "/ip4/127.0.0.1/tcp/9877"
         .parse()
diff --git a/xmr-btc/src/monero.rs b/xmr-btc/src/monero.rs
index 7196afc4..e4215853 100644
--- a/xmr-btc/src/monero.rs
+++ b/xmr-btc/src/monero.rs
@@ -97,11 +97,11 @@ impl Sub for Amount {
     }
 }
 
-impl Mul for Amount {
+impl Mul<u64> for Amount {
     type Output = Amount;
 
-    fn mul(self, rhs: Self) -> Self::Output {
-        Self(self.0 * rhs.0)
+    fn mul(self, rhs: u64) -> Self::Output {
+        Self(self.0 * rhs)
     }
 }