diff --git a/crates/ui-egui/src/viewport.rs b/crates/ui-egui/src/viewport.rs
index 4a59d6adf..a59485328 100644
--- a/crates/ui-egui/src/viewport.rs
+++ b/crates/ui-egui/src/viewport.rs
@@ -8567,10 +8567,10 @@ mod tests {
         let b = st.bodies.first().unwrap();
         let mesh = b.mesh();
         assert_eq!(mesh.edges.len(), 1536);
-        // Of the 512 wall joins, the offset curves' pieces meet with one curvature at 400; at the
-        // other 112 the curvature jumps by 0.9-3.6% (the offsets' pieces meet only tangentially)
-        // and the join is drawn.
-        assert_eq!(mesh.smooth_edges.iter().filter(|f| **f).count(), 400);
+        // SMLib sweeps each piece of the offset curves as itself (none is taken for a circle
+        // near it), so the pieces meet with one curvature at all 512 wall joins (the largest
+        // curvature jump 4.2e-7) and no join is drawn.
+        assert_eq!(mesh.smooth_edges.iter().filter(|f| **f).count(), 512);
         let smooth = mesh.smooth_edges.iter().position(|f| *f).unwrap();
         let expected = mesh.edges.iter().enumerate().filter(|(i, _)| mesh.shaded_edge_visible(*i)).map(|(_, e)| e.len() - 1).sum::<usize>();
         let shaded = build_scene(&app).merged();
@@ -8578,8 +8578,8 @@ mod tests {
         assert!(!shaded.tris.is_empty());
         app.ui.visual_style = 2;
         let wire = build_scene(&app).merged();
-        // The wireframe draws every edge but seams, and a seam measured as a crease (the offset
-        // ellipse's pieces meet at small real creases) is no seam.
+        // The wireframe draws every edge but seams, the smooth wall joins among them: they are
+        // edges between faces, hidden only when shaded.
         let expected_wire = mesh.edges.iter().enumerate().filter(|(i, _)| mesh.edge_visible(*i)).map(|(_, e)| e.len() - 1).sum::<usize>();
         assert_eq!(wire.lines.len() / crate::gpu::LINE_SIZE, expected_wire);
         assert!(expected_wire > expected);