diff --git a/t/auto-daemon-tests.pl b/t/auto-daemon-tests.pl
index e7f3d50ce..6fc558805 100755
--- a/t/auto-daemon-tests.pl
+++ b/t/auto-daemon-tests.pl
@@ -4538,6 +4538,278 @@ cmp_ok $resp->{SSRC}{0x7654321}{'average MOS'}{'round-trip time leg'}, '<', 2000
 
 
 
+new_call;
+
+offer('new to-tag answer w/ diff codec', { }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio 3000 RTP/AVP 8 9
+c=IN IP4 198.51.100.50
+a=sendrecv
+-------------------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8 9
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=rtpmap:9 G722/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+answer('new to-tag answer w/ diff codec', { }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio 3000 RTP/AVP 8
+c=IN IP4 198.51.100.50
+a=sendrecv
+-------------------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+new_tt();
+
+answer('new to-tag answer w/ diff codec', { }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio 3000 RTP/AVP 9
+c=IN IP4 198.51.100.50
+a=sendrecv
+-------------------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 9
+c=IN IP4 203.0.113.1
+a=rtpmap:9 G722/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+
+
+new_call;
+
+offer('new to-tag answer w/ diff codec w/ t-e', { }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio 3000 RTP/AVP 8 9 101
+c=IN IP4 198.51.100.50
+a=rtpmap:101 telephone-event/8000
+-------------------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8 9 101
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=rtpmap:9 G722/8000
+a=rtpmap:101 telephone-event/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+answer('new to-tag answer w/ diff codec w/ t-e', { }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio 3000 RTP/AVP 8 101
+c=IN IP4 198.51.100.50
+a=rtpmap:101 telephone-event/8000
+-------------------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8 101
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=rtpmap:101 telephone-event/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+new_tt();
+
+answer('new to-tag answer w/ diff codec w/ t-e', { }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio 3000 RTP/AVP 9 101
+c=IN IP4 198.51.100.50
+a=rtpmap:101 telephone-event/8000
+-------------------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 9 101
+c=IN IP4 203.0.113.1
+a=rtpmap:9 G722/8000
+a=rtpmap:101 telephone-event/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+
+
+
+new_call;
+
+offer('answer codec switch', { }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio 3000 RTP/AVP 8 9
+c=IN IP4 198.51.100.50
+a=sendrecv
+-------------------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8 9
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=rtpmap:9 G722/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+answer('answer codec switch', { }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio 3000 RTP/AVP 8
+c=IN IP4 198.51.100.50
+a=sendrecv
+-------------------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+answer('answer codec switch', { }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio 3000 RTP/AVP 9
+c=IN IP4 198.51.100.50
+a=sendrecv
+-------------------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 9
+c=IN IP4 203.0.113.1
+a=rtpmap:9 G722/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+
+
+new_call;
+
+offer('answer codec switch w/ t-e', { }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio 3000 RTP/AVP 8 9 101
+c=IN IP4 198.51.100.50
+a=rtpmap:101 telephone-event/8000
+-------------------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8 9 101
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=rtpmap:9 G722/8000
+a=rtpmap:101 telephone-event/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+answer('answer codec switch w/ t-e', { }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio 3000 RTP/AVP 8 101
+c=IN IP4 198.51.100.50
+a=rtpmap:101 telephone-event/8000
+-------------------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 8 101
+c=IN IP4 203.0.113.1
+a=rtpmap:8 PCMA/8000
+a=rtpmap:101 telephone-event/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+answer('answer codec switch w/ t-e', { }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio 3000 RTP/AVP 9 101
+c=IN IP4 198.51.100.50
+a=rtpmap:101 telephone-event/8000
+-------------------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.11
+s=tester
+t=0 0
+m=audio PORT RTP/AVP 9 101
+c=IN IP4 203.0.113.1
+a=rtpmap:9 G722/8000
+a=rtpmap:101 telephone-event/8000
+a=sendrecv
+a=rtcp:PORT
+SDP
+
+
+
+
 new_call;
 
 offer('a=mid mixup', { 'address family' => 'IP6' }, <<SDP);