diff --git a/server/src/atlas/step_canvas.rs b/server/src/atlas/step_canvas.rs
index eddb3ea33..bb639c6c0 100644
--- a/server/src/atlas/step_canvas.rs
+++ b/server/src/atlas/step_canvas.rs
@@ -1677,8 +1677,14 @@ mod tests {
             StepCanvasRung::Quarter.extent_m(),
             Some(scale::QUARTER_M as f64)
         );
-        assert_eq!(StepCanvasRung::Block.extent_m(), Some(scale::BLOCK_M as f64));
-        assert_eq!(StepCanvasRung::Chunk.extent_m(), Some(scale::CHUNK_M as f64));
+        assert_eq!(
+            StepCanvasRung::Block.extent_m(),
+            Some(scale::BLOCK_M as f64)
+        );
+        assert_eq!(
+            StepCanvasRung::Chunk.extent_m(),
+            Some(scale::CHUNK_M as f64)
+        );
         assert_eq!(StepCanvasRung::Global.extent_m(), None);
     }
 
@@ -1929,15 +1935,19 @@ mod tests {
     #[test]
     fn global_rung_stays_two_to_one_at_every_viewport_shape() {
         for req in [
-            (960u32, 540u32),   // 16:9 landscape — height-bound
-            (540, 960),         // portrait — height is huge, width binds
-            (700, 700),         // square
-            (4000, 100),        // absurdly wide
-            (1, 1),             // degenerate
+            (960u32, 540u32),     // 16:9 landscape — height-bound
+            (540, 960),           // portrait — height is huge, width binds
+            (700, 700),           // square
+            (4000, 100),          // absurdly wide
+            (1, 1),               // degenerate
             (u32::MAX, u32::MAX), // adversarial
         ] {
             let (w, h) = resolve_canvas_extent(StepCanvasRung::Global, req, 6371.0);
-            assert_eq!(w, h * 2, "request {req:?} produced a non-2:1 canvas {w}x{h}");
+            assert_eq!(
+                w,
+                h * 2,
+                "request {req:?} produced a non-2:1 canvas {w}x{h}"
+            );
             assert!(h >= 1, "request {req:?} collapsed the canvas to zero rows");
         }
     }
@@ -1947,8 +1957,14 @@ mod tests {
     #[test]
     fn global_rung_still_clamps_an_adversarial_extent() {
         let (w, h) = resolve_canvas_extent(StepCanvasRung::Global, (u32::MAX, u32::MAX), 6371.0);
-        assert!(w <= STEP_CANVAS_MAX_EXTENT_AXIS, "width {w} escaped the axis cap");
-        assert!(h <= STEP_CANVAS_MAX_EXTENT_AXIS, "height {h} escaped the axis cap");
+        assert!(
+            w <= STEP_CANVAS_MAX_EXTENT_AXIS,
+            "width {w} escaped the axis cap"
+        );
+        assert!(
+            h <= STEP_CANVAS_MAX_EXTENT_AXIS,
+            "height {h} escaped the axis cap"
+        );
     }
 
     /// A body with no radius is not a sphere (asteroid belt, oort cloud) and