diff --git a/tests/common/mod.rs b/tests/common/mod.rs
index 339eabc..788578a 100644
--- a/tests/common/mod.rs
+++ b/tests/common/mod.rs
@@ -194,7 +194,7 @@ pub fn assert_that_all_single_layer_groundless_ratlines_are_autorouted(
         .graph()
         .edge_indices()
         .map(|index| RatlineUid {
-            principal_layer: 0,
+            principal_layer: layer,
             index,
         })
     {