diff --git a/server/src/atlas/believability.rs b/server/src/atlas/believability.rs
index 0f0d8f9e1..de470178a 100644
--- a/server/src/atlas/believability.rs
+++ b/server/src/atlas/believability.rs
@@ -995,7 +995,14 @@ mod tests {
         // One land district...
         lone_island.insert(
             SurveyCellPos(0, 0),
-            district(MorphologyZone::AlluvialPlain, 20, 0, 50, 0, VegetationClass::Scrub),
+            district(
+                MorphologyZone::AlluvialPlain,
+                20,
+                0,
+                50,
+                0,
+                VegetationClass::Scrub,
+            ),
         );
         // ...surrounded by ocean (the "seamount" shape) — many ocean districts, but
         // only one that can ever cast a real D8 vote.