diff --git a/common/topology/src/lib.rs b/common/topology/src/lib.rs
index dd29508ef2..0cd511de3f 100644
--- a/common/topology/src/lib.rs
+++ b/common/topology/src/lib.rs
@@ -83,7 +83,7 @@ pub enum NymTopologyError {
     MissingLayerError(Vec<u64>),
 }
 
-pub trait NymTopology: Sized {
+pub trait NymTopology: Sized + PartialEq {
     fn new(directory_server: String) -> Self;
     fn new_from_nodes(
         mix_nodes: Vec<MixNode>,