diff --git a/crates/openshell-isolation-interface/tests/backend_conformance.rs b/crates/openshell-isolation-interface/tests/backend_conformance.rs
index e5143fb70..75da098c4 100644
--- a/crates/openshell-isolation-interface/tests/backend_conformance.rs
+++ b/crates/openshell-isolation-interface/tests/backend_conformance.rs
@@ -16,6 +16,7 @@ use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::{Arc, Mutex};
 
 use async_trait::async_trait;
+use openshell_isolation_interface::AgentSpec;
 use openshell_isolation_interface::contract::*;
 use tokio::sync::oneshot;