diff --git a/components/mdns/examples/query_advertise/pytest_mdns.py b/components/mdns/examples/query_advertise/pytest_mdns.py
index e78e094dd7..f8c9eacb13 100644
--- a/components/mdns/examples/query_advertise/pytest_mdns.py
+++ b/components/mdns/examples/query_advertise/pytest_mdns.py
@@ -64,6 +64,7 @@ def mdns_server(esp_host, events):
     sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
     sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
     sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
+    sock.setsockopt(socket.SOL_SOCKET, socket.SO_BINDTODEVICE, 'eth0\0'.encode('utf-8'))
     sock.setblocking(False)
     sock.bind((UDP_IP, UDP_PORT))
     mreq = struct.pack('4sl', socket.inet_aton(MCAST_GRP), socket.INADDR_ANY)