diff --git a/test/functional/p2p_invalid_messages.py b/test/functional/p2p_invalid_messages.py
--- a/test/functional/p2p_invalid_messages.py
+++ b/test/functional/p2p_invalid_messages.py
@@ -77,14 +77,15 @@
         conn = self.nodes[0].add_p2p_connection(P2PDataStore())
         # Create valid message
         msg = conn.build_message(msg_ping(nonce=12345))
-        cut_pos = 12    # Chosen at an arbitrary position within the header
+        # Chosen at an arbitrary position within the header
+        cut_pos = 12
         # Send message in two pieces
-        before = int(self.nodes[0].getnettotals()['totalbytesrecv'])
+        before = self.nodes[0].getnettotals()['totalbytesrecv']
         conn.send_raw_message(msg[:cut_pos])
         # Wait until node has processed the first half of the message
         self.wait_until(
-            lambda: int(self.nodes[0].getnettotals()['totalbytesrecv']) != before)
-        middle = int(self.nodes[0].getnettotals()['totalbytesrecv'])
+            lambda: self.nodes[0].getnettotals()['totalbytesrecv'] != before)
+        middle = self.nodes[0].getnettotals()['totalbytesrecv']
         # If this assert fails, we've hit an unlikely race
         # where the test framework sent a message in between the two halves
         assert_equal(middle, before + cut_pos)
@@ -137,7 +138,11 @@
             msg = msg[:7] + b'\x00' + msg[7 + 1:]
             conn.send_raw_message(msg)
             conn.sync_with_ping(timeout=1)
-            self.nodes[0].disconnect_p2ps()
+        # Check that traffic is accounted for (24 bytes header + 2 bytes
+        # payload)
+        assert_equal(
+            self.nodes[0].getpeerinfo()[0]['bytesrecv_per_msg']['*other*'], 26)
+        self.nodes[0].disconnect_p2ps()
 
     def test_addrv2(self, label, required_log_messages, raw_addrv2):
         node = self.nodes[0]