diff --git a/tests/compile.test.js b/tests/compile.test.js
index 58514f8..10e73d1 100644
--- a/tests/compile.test.js
+++ b/tests/compile.test.js
@@ -12,6 +12,9 @@ test("compile returns svg and topology for valid model", () => {
   assert.ok(result.layout_metrics);
   assert.equal(result.layout_metrics.overlap_edges, 0);
   assert.equal(result.layout_metrics.crossings, 0);
+  assert.equal(typeof result.layout_metrics.total_bends, "number");
+  assert.equal(typeof result.layout_metrics.detour_ratio, "number");
+  assert.equal(typeof result.layout_metrics.label_tie_fallbacks, "number");
   assert.ok(Array.isArray(result.bus_groups));
   assert.ok(result.render_mode_used);
 });
@@ -21,6 +24,8 @@ test("compile fails on invalid model", () => {
   const result = compile(bad);
   assert.equal(result.ok, false);
   assert.ok(result.errors.length > 0);
+  assert.equal(result.layout_metrics.total_bends, 0);
+  assert.equal(result.layout_metrics.detour_ratio, 1);
 });
 
 test("compile accepts render mode options", () => {