diff --git a/codex-rs/core/src/mcp_tool_call_tests.rs b/codex-rs/core/src/mcp_tool_call_tests.rs
index 723948b7be..76a7d1e523 100644
--- a/codex-rs/core/src/mcp_tool_call_tests.rs
+++ b/codex-rs/core/src/mcp_tool_call_tests.rs
@@ -1701,7 +1701,7 @@ async fn guardian_review_decision_maps_to_mcp_tool_decision() {
     else {
         panic!("guardian timeout should carry a timeout message");
     };
-    assert!(message.contains("did not finish before its deadline"));
+    assert!(message.contains("Automatic approval review timed out"));
     assert!(!message.contains("unacceptable risk"));
     assert_eq!(
         mcp_tool_approval_decision_from_guardian(
diff --git a/codex-rs/core/tests/suite/guardian_review.rs b/codex-rs/core/tests/suite/guardian_review.rs
index 8f5d7e1adb..fb6ff08bec 100644
--- a/codex-rs/core/tests/suite/guardian_review.rs
+++ b/codex-rs/core/tests/suite/guardian_review.rs
@@ -147,7 +147,7 @@ async fn guardian_timeout_falls_back_to_manual_approval_end_to_end() -> Result<(
         approval
             .reason
             .as_deref()
-            .is_some_and(|reason| reason.contains("did not finish before its deadline"))
+            .is_some_and(|reason| reason.contains("Automatic approval review timed out"))
     );
 
     test.codex