diff --git a/test/util_datac0.py b/test/util_datac0.py
index 4d0ce4ce..71e47faa 100644
--- a/test/util_datac0.py
+++ b/test/util_datac0.py
@@ -297,5 +297,5 @@ def t_datac0_2(
             sock.SOCKET_QUEUE.queue
         ), f"{item} not found in {str(sock.SOCKET_QUEUE.queue)}"
 
-    assert '"arq":"session","status":"close"' in str(sock.SOCKET_QUEUE.queue)
+    assert '"arq":"session","dxcallsign":"AA0AA","status":"close"' in str(sock.SOCKET_QUEUE.queue)
     log.warning("station2: Exiting!")
diff --git a/test/util_datac0_negative.py b/test/util_datac0_negative.py
index 4163362e..d1252e8d 100644
--- a/test/util_datac0_negative.py
+++ b/test/util_datac0_negative.py
@@ -287,7 +287,10 @@ def t_datac0_2(
 
     # Allow enough time for this side to receive the disconnect frame.
     timeout = time.time() + timeout_duration
-    while '"arq":"session","status":"close"' not in str(sock.SOCKET_QUEUE.queue):
+    while '"arq":"session", "dxcallsign": "AA2BB-0", "status":"close"' not in str(sock.SOCKET_QUEUE.queue):
+
+
+
         if time.time() > timeout:
             log.warning("station2", TIMEOUT=True, queue=str(sock.SOCKET_QUEUE.queue))
             break
@@ -303,5 +306,5 @@ def t_datac0_2(
             sock.SOCKET_QUEUE.queue
         ), f"{item} found in {str(sock.SOCKET_QUEUE.queue)}"
 
-    assert '"arq":"session","status":"close"' in str(sock.SOCKET_QUEUE.queue)
+    assert '"arq":"session", "dxcallsign": "AA2BB-0", "status":"close"' in str(sock.SOCKET_QUEUE.queue)
     log.warning("station2: Exiting!")
diff --git a/tnc/static.py b/tnc/static.py
index 3a7e70cc..b824e2b6 100644
--- a/tnc/static.py
+++ b/tnc/static.py
@@ -25,7 +25,7 @@ TNCPROCESS: subprocess.Popen
 MYCALLSIGN: bytes = b"AA0AA"
 MYCALLSIGN_CRC: bytes = b"A"
 
-DXCALLSIGN: bytes = b"AA0AA"
+DXCALLSIGN: bytes = b"ZZ9YY"
 DXCALLSIGN_CRC: bytes = b"A"
 
 MYGRID: bytes = b""