diff --git a/codex-rs/core/tests/suite/fork_thread.rs b/codex-rs/core/tests/suite/fork_thread.rs
index 8f2fd03632..5685aa100c 100644
--- a/codex-rs/core/tests/suite/fork_thread.rs
+++ b/codex-rs/core/tests/suite/fork_thread.rs
@@ -228,7 +228,13 @@ async fn fork_thread_session_configured_preserves_parent_and_history() {
         session_configured,
         ..
     } = thread_manager
-        .fork_thread(usize::MAX, config_for_fork, base_path, false, None)
+        .fork_thread(
+            usize::MAX,
+            config_for_fork,
+            base_path,
+            /*persist_extended_history*/ false,
+            /*parent_trace*/ None,
+        )
         .await
         .expect("fork thread");