diff --git a/src/test.rs b/src/test.rs
index 5102e59..d3dd396 100644
--- a/src/test.rs
+++ b/src/test.rs
@@ -144,3 +144,10 @@ fn test_symmetry_negative() {
   let (_, b) = parser::subtree("([1.0]A[3.0]B)").unwrap();
   assert_ne!(a, b)
 }
+
+#[test]
+fn test_symmetry_complex() {
+  let (_, a) = parser::subtree("([1.0]C[0.5]([1.0]B[2.5]A))").unwrap();
+  let (_, b) = parser::subtree("([0.5]([2.5]A[1.0]B)[1.0]C)").unwrap();
+  assert_eq!(a, b)
+}