diff --git a/world/src/sim/diffusion.rs b/world/src/sim/diffusion.rs
index 875d0b6556..c810532d36 100644
--- a/world/src/sim/diffusion.rs
+++ b/world/src/sim/diffusion.rs
@@ -421,7 +421,7 @@ pub fn tridag(a: &[f64], b: &[f64], c: &[f64], r: &[f64], u: &mut [f64], n: usiz
 
     gam = vec![Default::default(); n];
 
-    assert!(b[0] != 0.0);
+    assert_ne!(b[0], 0.0);
     /*
 
     ! first pass
@@ -443,7 +443,7 @@ pub fn tridag(a: &[f64], b: &[f64], c: &[f64], r: &[f64], u: &mut [f64], n: usiz
     for j in 1..n {
         gam[j] = c[j - 1] / bet;
         bet = b[j] - a[j] * gam[j];
-        assert!(bet != 0.0);
+        assert_ne!(bet, 0.0);
         // Round 0: u[0] = r[0] / b[0]
         //               = r'[0] / b'[0]
         // Round j: u[j] = (r[j] - a[j] * u'[j - 1]) / b'[j]
diff --git a/world/src/sim/erosion.rs b/world/src/sim/erosion.rs
index adf35652de..e94cd40fb1 100644
--- a/world/src/sim/erosion.rs
+++ b/world/src/sim/erosion.rs
@@ -1063,9 +1063,9 @@ fn erode(
     let mut h_stack = vec![Zero::zero(); dh.len()];
     let mut b_stack = vec![Zero::zero(); dh.len()];
     let mut area_stack = vec![Zero::zero(); dh.len()];
-    assert!(mstack.len() == dh.len());
-    assert!(b.len() == dh.len());
-    assert!(h_t.len() == dh.len());
+    assert_eq!(mstack.len(), dh.len());
+    assert_eq!(b.len(), dh.len());
+    assert_eq!(h_t.len(), dh.len());
     let mstack_inv = &mut *mstack_inv;
     mstack.iter().enumerate().for_each(|(stacki, &posi)| {
         let posi = posi as usize;
@@ -1472,7 +1472,7 @@ fn erode(
         .into_par_iter()
         .enumerate()
         .for_each(|(posi, (&stacki, h))| {
-            assert!(posi == mstack[stacki] as usize);
+            assert_eq!(posi, mstack[stacki] as usize);
             *h = h_stack[stacki];
         });
 
@@ -2270,7 +2270,7 @@ pub fn get_lakes<F: Float>(
                                 _ => {},
                             }
                         });
-                        assert!(rcv != -1);
+                        assert_ne!(rcv, -1);
                         downhill[node] = rcv;
                         tag[node] = Tag::WithRcv;
                     }