diff --git a/harness/tests/test_util/mod.rs b/harness/tests/test_util/mod.rs
index 358358d8e..31326317c 100644
--- a/harness/tests/test_util/mod.rs
+++ b/harness/tests/test_util/mod.rs
@@ -106,7 +106,7 @@ pub fn new_test_raft_with_logs(
 }
 
 pub fn new_test_raft_with_config(config: &Config, storage: MemStorage, l: &Logger) -> Interface {
-    Interface::new(Raft::new(&config, storage, l).unwrap())
+    Interface::new(Raft::new(config, storage, l).unwrap())
 }
 
 pub fn hard_state(t: u64, c: u64, v: u64) -> HardState {