diff --git a/units/src/amount/tests.rs b/units/src/amount/tests.rs
index d6becf50f..42a9e3d3c 100644
--- a/units/src/amount/tests.rs
+++ b/units/src/amount/tests.rs
@@ -18,28 +18,31 @@ use crate::{FeeRate, Weight};
 
 #[test]
 fn sanity_check() {
-    assert_eq!(SignedAmount::from_sat(-100).abs(), SignedAmount::from_sat(100));
+    let sat = Amount::from_sat;
+    let ssat = SignedAmount::from_sat;
+
+    assert_eq!(ssat(-100).abs(), ssat(100));
     assert_eq!(
-        SignedAmount::from_sat(i64::MIN + 1).checked_abs().unwrap(),
-        SignedAmount::from_sat(i64::MAX)
+        ssat(i64::MIN + 1).checked_abs().unwrap(),
+        ssat(i64::MAX)
     );
-    assert_eq!(SignedAmount::from_sat(-100).signum(), -1);
-    assert_eq!(SignedAmount::from_sat(0).signum(), 0);
-    assert_eq!(SignedAmount::from_sat(100).signum(), 1);
-    assert_eq!(SignedAmount::from(Amount::from_sat(100)), SignedAmount::from_sat(100));
-    assert!(SignedAmount::from_sat(i64::MIN).checked_abs().is_none());
-    assert!(!SignedAmount::from_sat(-100).is_positive());
-    assert!(SignedAmount::from_sat(100).is_positive());
+    assert_eq!(ssat(-100).signum(), -1);
+    assert_eq!(ssat(0).signum(), 0);
+    assert_eq!(ssat(100).signum(), 1);
+    assert_eq!(SignedAmount::from(sat(100)), ssat(100));
+    assert!(ssat(i64::MIN).checked_abs().is_none());
+    assert!(!ssat(-100).is_positive());
+    assert!(ssat(100).is_positive());
 
     #[cfg(feature = "alloc")]
     {
         assert_eq!(
             Amount::from_float_in(0_f64, Denomination::Bitcoin).unwrap(),
-            Amount::from_sat(0)
+            sat(0)
         );
         assert_eq!(
             Amount::from_float_in(2_f64, Denomination::Bitcoin).unwrap(),
-            Amount::from_sat(200_000_000)
+            sat(200_000_000)
         );
         assert!(Amount::from_float_in(-100_f64, Denomination::Bitcoin).is_err());
     }
@@ -135,7 +138,7 @@ fn mul_div() {
     a %= 3;
     assert_eq!(a, sat(1));
     a *= 3;
-    assert_eq!(a, Amount::from_sat(3));
+    assert_eq!(a, sat(3));
 
     let mut b = ssat(30);
     b /= 3;
@@ -143,7 +146,7 @@ fn mul_div() {
     b %= 3;
     assert_eq!(b, ssat(1));
     b *= 3;
-    assert_eq!(b, SignedAmount::from_sat(3));
+    assert_eq!(b, ssat(3));
 }
 
 #[test]
@@ -179,27 +182,32 @@ fn checked_arithmetic() {
 #[test]
 #[allow(deprecated_in_future)]
 fn unchecked_arithmetic() {
+    let sat = Amount::from_sat;
+    let ssat = SignedAmount::from_sat;
+
     assert_eq!(
-        SignedAmount::from_sat(10).unchecked_add(SignedAmount::from_sat(20)),
-        SignedAmount::from_sat(30)
+        ssat(10).unchecked_add(ssat(20)),
+        ssat(30)
     );
     assert_eq!(
-        SignedAmount::from_sat(50).unchecked_sub(SignedAmount::from_sat(10)),
-        SignedAmount::from_sat(40)
+        ssat(50).unchecked_sub(ssat(10)),
+        ssat(40)
     );
-    assert_eq!(Amount::from_sat(5).unchecked_add(Amount::from_sat(7)), Amount::from_sat(12));
-    assert_eq!(Amount::from_sat(10).unchecked_sub(Amount::from_sat(7)), Amount::from_sat(3));
+    assert_eq!(sat(5).unchecked_add(sat(7)), sat(12));
+    assert_eq!(sat(10).unchecked_sub(sat(7)), sat(3));
 }
 
 #[test]
 fn positive_sub() {
+    let ssat = SignedAmount::from_sat;
+
     assert_eq!(
-        SignedAmount::from_sat(10).positive_sub(SignedAmount::from_sat(7)).unwrap(),
-        SignedAmount::from_sat(3)
+        ssat(10).positive_sub(ssat(7)).unwrap(),
+        ssat(3)
     );
-    assert!(SignedAmount::from_sat(-10).positive_sub(SignedAmount::from_sat(7)).is_none());
-    assert!(SignedAmount::from_sat(10).positive_sub(SignedAmount::from_sat(-7)).is_none());
-    assert!(SignedAmount::from_sat(10).positive_sub(SignedAmount::from_sat(11)).is_none());
+    assert!(ssat(-10).positive_sub(ssat(7)).is_none());
+    assert!(ssat(10).positive_sub(ssat(-7)).is_none());
+    assert!(ssat(10).positive_sub(ssat(11)).is_none());
 }
 
 #[cfg(feature = "alloc")]