diff --git a/harmony/src/modules/dummy.rs b/harmony/src/modules/dummy.rs
index e212872..2e63797 100644
--- a/harmony/src/modules/dummy.rs
+++ b/harmony/src/modules/dummy.rs
@@ -47,7 +47,7 @@ impl<T: Topology> Score<T> for SuccessScore {
 
 /// An interpret that only returns the result it is given when built. It does nothing else. Only
 /// useful for development/testing purposes.
-#[derive(Debug, Clone)]
+#[derive(Debug)]
 struct DummyInterpret {
     status: InterpretStatus,
     result: Result<Outcome, InterpretError>,