@@ -391,7 +391,8 @@ describe("thread action undo", () => {
       await useThreadListActions().unpinThread(thread);
       expect(readThreadUndoNotice()?.action).toBe("Unpinned");
       await readThreadUndoNotice()!.undo();
-      const restoresSnooze = snoozedUntil != null && Date.parse(snoozedUntil) > Date.now();
+      // 2099 is the unexpired case; 2000 has long passed.
+      const restoresSnooze = snoozedUntil === "2099-01-01T09:00:00.000Z";
       expect(state.requests.map(({ action }) => action)).toEqual(
         restoresSnooze ? ["unpin", "pin", "snooze"] : ["unpin", "pin"],
       );