diff --git a/crates/fj-core/src/validation/checks/face_winding.rs b/crates/fj-core/src/validation/checks/face_winding.rs
index fb2273bce..495147eb8 100644
--- a/crates/fj-core/src/validation/checks/face_winding.rs
+++ b/crates/fj-core/src/validation/checks/face_winding.rs
@@ -88,20 +88,21 @@ mod tests {
     fn interior_winding() -> anyhow::Result<()> {
         let mut core = Core::new();
 
-        let valid = Face::polygon(
-            core.layers.topology.surfaces.xy_plane(),
-            [[0., 0.], [3., 0.], [0., 3.]],
-            &mut core,
-        )
-        .update_region(
-            |region, core| {
-                region.add_interiors(
-                    [Cycle::polygon([[1., 1.], [1., 2.], [2., 1.]], core)],
-                    core,
-                )
-            },
-            &mut core,
-        );
+        let surface = core.layers.topology.surfaces.xy_plane();
+        let valid =
+            Face::polygon(surface, [[0., 0.], [3., 0.], [0., 3.]], &mut core)
+                .update_region(
+                    |region, core| {
+                        region.add_interiors(
+                            [Cycle::polygon(
+                                [[1., 1.], [1., 2.], [2., 1.]],
+                                core,
+                            )],
+                            core,
+                        )
+                    },
+                    &mut core,
+                );
         InteriorCycleHasInvalidWinding::check_and_return_first_error(
             &valid,
             &core.layers.geometry,