diff --git a/tests/net_inet/uasyncio_tcp_read_headers.py.exp b/tests/net_inet/uasyncio_tcp_read_headers.py.exp
index c200238dc..932d2674c 100644
--- a/tests/net_inet/uasyncio_tcp_read_headers.py.exp
+++ b/tests/net_inet/uasyncio_tcp_read_headers.py.exp
@@ -5,6 +5,7 @@ b'Content-Length: 54'
 b'Connection: close'
 b'Vary: Accept-Encoding'
 b'ETag: "54306c85-36"'
+b'Strict-Transport-Security: max-age=15768000'
 b'Accept-Ranges: bytes'
 close
 done