diff --git a/server/src/atlas/district_profile.rs b/server/src/atlas/district_profile.rs
index 516ecb3b4..d4c422c12 100644
--- a/server/src/atlas/district_profile.rs
+++ b/server/src/atlas/district_profile.rs
@@ -2071,7 +2071,9 @@ mod tests {
             let mut n = 0;
             for dx in 0..8 {
                 let prof = derive_district(test_seed(), "test_body", &p, &ta, (dx, dy), &climate);
-                sum += prof.temperature_c.expect("breathable body must have a temperature");
+                sum += prof
+                    .temperature_c
+                    .expect("breathable body must have a temperature");
                 n += 1;
             }
             sum / n as f32
@@ -2394,8 +2396,10 @@ mod tests {
         for i in 0..20 {
             let wx = (150 + i * 47) as f64 * dm;
             let wy = (150 + i * 31) as f64 * dm;
-            let district = derive_at_metres(test_seed(), "test_body", &p, &ta, wx, wy, &climate, 4_096.0);
-            let quarter = derive_at_metres(test_seed(), "test_body", &p, &ta, wx, wy, &climate, 1_024.0);
+            let district =
+                derive_at_metres(test_seed(), "test_body", &p, &ta, wx, wy, &climate, 4_096.0);
+            let quarter =
+                derive_at_metres(test_seed(), "test_body", &p, &ta, wx, wy, &climate, 1_024.0);
             if district.elev_q != quarter.elev_q
                 || district.slope_q != quarter.slope_q
                 || district.moisture_q != quarter.moisture_q
@@ -2429,12 +2433,26 @@ mod tests {
             // Above the coastal warp's own coarsest octave (262,144 m) — every
             // octave in every band (coast, terrain, voxel relief) is excluded.
             let far_above = derive_at_metres(
-                test_seed(), "test_body", &p, &ta, wx, wy, &climate, 300_000.0,
+                test_seed(),
+                "test_body",
+                &p,
+                &ta,
+                wx,
+                wy,
+                &climate,
+                300_000.0,
             );
             // An even more extreme cutoff must produce the SAME result — once
             // every octave is truncated, going coarser still changes nothing.
             let even_further = derive_at_metres(
-                test_seed(), "test_body", &p, &ta, wx, wy, &climate, 10_000_000.0,
+                test_seed(),
+                "test_body",
+                &p,
+                &ta,
+                wx,
+                wy,
+                &climate,
+                10_000_000.0,
             );
             assert_district_profiles_eq(&far_above, &even_further);
         }
@@ -2468,7 +2486,14 @@ mod tests {
         let base_wy = 15.0 * dm;
 
         let district_class = derive_at_metres(
-            test_seed(), "test_body", &p, &ta, base_wx, base_wy, &climate, 2_048.0,
+            test_seed(),
+            "test_body",
+            &p,
+            &ta,
+            base_wx,
+            base_wy,
+            &climate,
+            2_048.0,
         )
         .vegetation_class;
 
diff --git a/server/src/atlas/vegetation_invention.rs b/server/src/atlas/vegetation_invention.rs
index 4f9850cc9..b027bae3f 100644
--- a/server/src/atlas/vegetation_invention.rs
+++ b/server/src/atlas/vegetation_invention.rs
@@ -198,7 +198,10 @@ fn texture_field(seed: u64, wx: f64, wy: f64, min_wavelength_m: f64) -> f64 {
     let mut amp = 1.0;
     let mut norm = 0.0;
     let mut idx: u64 = 0;
-    for &wl in OCTAVE_WAVELENGTHS_M.iter().chain(VOXEL_OCTAVE_WAVELENGTHS_M.iter()) {
+    for &wl in OCTAVE_WAVELENGTHS_M
+        .iter()
+        .chain(VOXEL_OCTAVE_WAVELENGTHS_M.iter())
+    {
         if wl < min_wavelength_m {
             amp *= 0.5;
             idx += 1;
diff --git a/server/tests/window_derivation_golden.rs b/server/tests/window_derivation_golden.rs
index 19fd38fbb..c66672dde 100644
--- a/server/tests/window_derivation_golden.rs
+++ b/server/tests/window_derivation_golden.rs
@@ -180,12 +180,30 @@ fn golden_samples() -> Vec<GoldenSample> {
     let mut out = Vec::new();
     for (label, wx, wy) in sweep_positions() {
         out.push(derive_golden_sample(
-            label, "district", seed, body_id, &params, &ta, &climate, wx, wy,
-            DISTRICT_MIN_WL_M, false,
+            label,
+            "district",
+            seed,
+            body_id,
+            &params,
+            &ta,
+            &climate,
+            wx,
+            wy,
+            DISTRICT_MIN_WL_M,
+            false,
         ));
         out.push(derive_golden_sample(
-            label, "quarter", seed, body_id, &params, &ta, &climate, wx, wy,
-            QUARTER_MIN_WL_M, false,
+            label,
+            "quarter",
+            seed,
+            body_id,
+            &params,
+            &ta,
+            &climate,
+            wx,
+            wy,
+            QUARTER_MIN_WL_M,
+            false,
         ));
         out.push(derive_golden_sample(
             label, "region", seed, body_id, &params, &ta, &climate, wx, wy, 0.0, true,