diff --git a/codex-rs/tui/src/app.rs b/codex-rs/tui/src/app.rs
index ee54eac35f..21c1c1ceff 100644
--- a/codex-rs/tui/src/app.rs
+++ b/codex-rs/tui/src/app.rs
@@ -3304,8 +3304,8 @@ mod tests {
     use crate::file_search::FileSearchManager;
     use crate::history_cell::AgentMessageCell;
     use crate::history_cell::HistoryCell;
+    use crate::history_cell::SessionHeaderHistoryCell;
     use crate::history_cell::UserHistoryCell;
-    use crate::history_cell::new_session_info;
     use codex_core::CodexAuth;
     use codex_core::config::ConfigBuilder;
     use codex_core::config::ConfigOverrides;
@@ -3686,12 +3686,12 @@ mod tests {
                 network_proxy: None,
                 rollout_path: Some(PathBuf::new()),
             };
-            Arc::new(new_session_info(
-                app.chat_widget.config_ref(),
-                app.chat_widget.current_model(),
-                event,
-                is_first,
-                None,
+            let _ = is_first;
+            Arc::new(SessionHeaderHistoryCell::new(
+                event.model,
+                event.reasoning_effort,
+                event.cwd,
+                crate::version::CODEX_CLI_VERSION,
             )) as Arc<dyn HistoryCell>
         };
 
@@ -4183,12 +4183,12 @@ mod tests {
                 network_proxy: None,
                 rollout_path: Some(PathBuf::new()),
             };
-            Arc::new(new_session_info(
-                app.chat_widget.config_ref(),
-                app.chat_widget.current_model(),
-                event,
-                is_first,
-                None,
+            let _ = is_first;
+            Arc::new(SessionHeaderHistoryCell::new(
+                event.model,
+                event.reasoning_effort,
+                event.cwd,
+                crate::version::CODEX_CLI_VERSION,
             )) as Arc<dyn HistoryCell>
         };
 
diff --git a/codex-rs/tui/src/history_cell.rs b/codex-rs/tui/src/history_cell.rs
index 450c212228..24bdfe18d3 100644
--- a/codex-rs/tui/src/history_cell.rs
+++ b/codex-rs/tui/src/history_cell.rs
@@ -1037,33 +1037,6 @@ impl HistoryCell for SessionInfoCell {
     }
 }
 
-#[cfg(test)]
-pub(crate) fn new_session_info(
-    config: &Config,
-    requested_model: &str,
-    event: SessionConfiguredEvent,
-    is_first_event: bool,
-    auth_plan: Option<PlanType>,
-) -> SessionInfoCell {
-    // Header box rendered as history (so it appears at the very top)
-    let header = SessionHeaderHistoryCell::new(
-        event.model.clone(),
-        event.reasoning_effort,
-        config.cwd.clone(),
-        CODEX_CLI_VERSION,
-    );
-    let mut parts: Vec<Box<dyn HistoryCell>> = vec![Box::new(header)];
-    parts.extend(session_info_body_parts(
-        config,
-        requested_model,
-        &event,
-        is_first_event,
-        auth_plan,
-    ));
-
-    SessionInfoCell(CompositeHistoryCell { parts })
-}
-
 pub(crate) fn new_session_info_body(
     config: &Config,
     requested_model: &str,