fix: flaky (#15869)

codex-rs/core/tests/suite/unified_exec.rs

@@ -1209,14 +1209,24 @@ async fn unified_exec_emits_one_begin_and_one_end_event() -> Result<()> {
 
     let mut begin_events = Vec::new();
     let mut end_events = Vec::new();
+    let mut task_completed = false;
     loop {
         let event_msg = wait_for_event(&codex, |_| true).await;
         match event_msg {
-            EventMsg::ExecCommandBegin(event) => begin_events.push(event),
-            EventMsg::ExecCommandEnd(event) => end_events.push(event),
-            EventMsg::TurnComplete(_) => break,
+            EventMsg::ExecCommandBegin(event) if event.call_id == open_call_id => {
+                begin_events.push(event);
+            }
+            EventMsg::ExecCommandEnd(event) if event.call_id == open_call_id => {
+                end_events.push(event);
+            }
+            EventMsg::TurnComplete(_) => {
+                task_completed = true;
+            }
             _ => {}
         }
+        if task_completed && !end_events.is_empty() {
+            break;
+        }
     }
 
     assert_eq!(