diff --git a/tests/runner-e2e/chat-catalog-domains/internal-timeline-narrative.ts b/tests/runner-e2e/chat-catalog-domains/internal-timeline-narrative.ts
index 406f8a74ef2..84178d37800 100644
--- a/tests/runner-e2e/chat-catalog-domains/internal-timeline-narrative.ts
+++ b/tests/runner-e2e/chat-catalog-domains/internal-timeline-narrative.ts
@@ -45,7 +45,7 @@ export function truthfulTimelineAccount(input: {
       if (knownHuman.test(after) || knownWorker.test(after)) return true;
       if (!actor[1] && /^[a-z]+ing\b/.test(after)) return false;
       const word = /^[\p{L}]+/u.exec(after)?.[0]?.toLowerCase();
-      return !calendarWords.has(word ?? "") && (/^(?:(?:native|test)\s+)?(?:agent|worker|runner|system|automation|harness|CEO)\b/i.test(after)
+      return !calendarWords.has(word ?? "") && (/^(?:(?:another|other|different)\s+)?(?:(?:native|test)\s+)?(?:agent|worker|bot|runner|system|automation|harness|CEO)\b/i.test(after)
         || /^[A-Z][\p{L}'-]+\b/u.test(after));
     });
     if (byActors.some(actor => !knownHuman.test(text.slice(actor.index + actor[0].length)))) return [];
diff --git a/tests/runner-e2e/chat-catalog-domains/internal-timeline-native-milestone.test.ts b/tests/runner-e2e/chat-catalog-domains/internal-timeline-native-milestone.test.ts
index a9e2529a62e..91278a4bc7d 100644
--- a/tests/runner-e2e/chat-catalog-domains/internal-timeline-native-milestone.test.ts
+++ b/tests/runner-e2e/chat-catalog-domains/internal-timeline-native-milestone.test.ts
@@ -377,3 +377,9 @@ it.each([
   const o = fixture(); o.reply = reply;
   expect(gradeWorkTimeline(o).passed).toBe(true);
 });
+
+it.each(["another agent", "a bot"])("retains explicit nonhuman handoff attribution for %s", actor => {
+  const o = fixture();
+  o.reply = o.reply.replace("Then a human reassigned the task to Riley.", `The task was reassigned to Riley by ${actor}.`);
+  expect(gradeWorkTimeline(o).passed).toBe(false);
+});