diff --git a/scapy/automaton.py b/scapy/automaton.py
index 5f3ffcc12cd..f26370b102f 100644
--- a/scapy/automaton.py
+++ b/scapy/automaton.py
@@ -1042,9 +1042,10 @@ def _run() -> None:
                     # start atmt
                     atmt_server.runbg()
                     # housekeeping
-                    for atmt, clientsocket in clients:
+                    for atmt, clientsocket in clients[:]:
                         if not atmt.isrunning():
                             atmt.destroy()
+                            clients.remove((atmt, clientsocket))
             except KeyboardInterrupt:
                 print("X Exiting.")
                 ssock.shutdown(socket.SHUT_RDWR)
diff --git a/test/scapy/automaton.uts b/test/scapy/automaton.uts
index ab107b8bc74..6aec9b0bbac 100644
--- a/test/scapy/automaton.uts
+++ b/test/scapy/automaton.uts
@@ -519,4 +519,3 @@ if LINUX:
         if LINUX:
             # Remove the iptables rule
             assert os.system(IPTABLE_RULE % ('D', SECDEV_IP4)) == 0
-