diff --git a/tests/brep/test_assembly.cpp b/tests/brep/test_assembly.cpp
index baa2330..bfbb29b 100644
--- a/tests/brep/test_assembly.cpp
+++ b/tests/brep/test_assembly.cpp
@@ -27,7 +27,7 @@ TEST(AssemblyTest, NestedHierarchy) {
     arm->add_part("seg2", make_cylinder(1, 6));
     
     EXPECT_EQ(assy.part_count(), 3u);
-    EXPECT_EQ(assy.node_count(), 4u); // root + arm + seg1 + seg2
+    EXPECT_EQ(assy.node_count(), 5u); // root + arm + seg1 + seg2
 }
 
 TEST(AssemblyTest, VisitPartsWithTransform) {