diff --git a/server/src/atlas/layer_proxy.rs b/server/src/atlas/layer_proxy.rs
index f0c7a97ae..5cff36a08 100644
--- a/server/src/atlas/layer_proxy.rs
+++ b/server/src/atlas/layer_proxy.rs
@@ -3070,7 +3070,12 @@ mod tests {
                     (lo.min(p.1), hi.max(p.1))
                 });
             let margin = 50_000.0;
-            let window_rect = (min_x - margin, min_y - margin, max_x + margin, max_y + margin);
+            let window_rect = (
+                min_x - margin,
+                min_y - margin,
+                max_x + margin,
+                max_y + margin,
+            );
 
             let wire = crop_course_to_window(
                 &course,
@@ -3083,7 +3088,12 @@ mod tests {
                 0.0,
                 station_spacing_m,
             )
-            .unwrap_or_else(|| panic!("Mouth edge {:?} cropped to nothing in its own window", edge.edge_id));
+            .unwrap_or_else(|| {
+                panic!(
+                    "Mouth edge {:?} cropped to nothing in its own window",
+                    edge.edge_id
+                )
+            });
 
             assert_eq!(
                 wire.terminus,
@@ -3159,8 +3169,7 @@ mod tests {
             .find(|e| e.terminus == river_course::EdgeTerminusKind::Mouth)
             .expect("GJ1c fixture must have at least one Mouth edge");
 
-        let course =
-            river_course::invent_course(seed, edge, &ta, &params, station_spacing_m, 0.0);
+        let course = river_course::invent_course(seed, edge, &ta, &params, station_spacing_m, 0.0);
         assert!(
             course.points.len() >= 2,
             "need a non-degenerate course to construct a meaningful upstream cut"
@@ -3291,7 +3300,12 @@ mod tests {
             heightmap
         };
 
-        let dr = drainage::analyze(&working.data, working.width, working.height, working.sea_level);
+        let dr = drainage::analyze(
+            &working.data,
+            working.width,
+            working.height,
+            working.sea_level,
+        );
         let ta = crate::atlas::features::TerrainAnalysis::analyze(&working, &dr);
         let rn = &dr.river_network;
 
@@ -3302,7 +3316,10 @@ mod tests {
             .iter()
             .find(|e| e.edge_id == river_course::pack_cell_id(target_px))
             .expect("GJ380c must have a Mouth edge at the live-captured cell");
-        assert_eq!(edge.edge_id, 4129122, "must be the same edge the live capture reported");
+        assert_eq!(
+            edge.edge_id, 4129122,
+            "must be the same edge the live capture reported"
+        );
 
         let seed = SeedChain::for_body(0, "GJ380c"); // production default world_seed
         let climate = crate::atlas::district_profile::ClimateConstants::default();