diff --git a/t/auto-daemon-tests.pl b/t/auto-daemon-tests.pl
index 83a36ac79..31fba2259 100755
--- a/t/auto-daemon-tests.pl
+++ b/t/auto-daemon-tests.pl
@@ -17076,6 +17076,102 @@ a=sendrecv
 a=rtcp:PORT
 SDP
 
+new_call;
+
+offer('SDP attr manipulations - substitute a=fmtp line for media audio', { ICE => 'remove', DTLS => 'off', SDES => [ 'nonew' ], flags => ['sdp-attr-substitute-audio-fmtp:101..0-16>fmtp:101..0-15,32,36'] }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.1
+s=tester
+t=0 0
+m=audio 2000 RTP/SAVP 0 101
+c=IN IP4 198.51.100.1
+a=rtpmap:101 telephone-event/8000
+a=fmtp:101 0-16
+a=ptime:20
+a=sendrecv
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.1
+s=tester
+t=0 0
+m=audio PORT RTP/SAVP 0 101
+c=IN IP4 203.0.113.1
+a=fmtp:101 0-15,32,36
+a=rtpmap:0 PCMU/8000
+a=rtpmap:101 telephone-event/8000
+a=sendrecv
+a=rtcp:PORT
+a=ptime:20
+SDP
+
+answer('SDP attr manipulations - substitute a=fmtp line for media audio', { ICE => 'remove' }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.3
+s=tester
+t=0 0
+m=audio 2002 RTP/SAVP 0
+c=IN IP4 198.51.100.3
+a=sendrecv
+--------------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.3
+s=tester
+t=0 0
+m=audio PORT RTP/SAVP 0
+c=IN IP4 203.0.113.1
+a=rtpmap:0 PCMU/8000
+a=sendrecv
+a=rtcp:PORT
+a=ptime:20
+SDP
+
+new_call;
+
+offer('SDP attr manipulations - remove a=fmtp line for media audio', { ICE => 'remove', DTLS => 'off', SDES => [ 'nonew' ], flags => ['sdp-attr-remove-audio-fmtp:101..0-16'] }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.1
+s=tester
+t=0 0
+m=audio 2000 RTP/SAVP 0 101
+c=IN IP4 198.51.100.1
+a=rtpmap:101 telephone-event/8000
+a=fmtp:101 0-16
+a=ptime:20
+a=sendrecv
+----------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.1
+s=tester
+t=0 0
+m=audio PORT RTP/SAVP 0 101
+c=IN IP4 203.0.113.1
+a=rtpmap:0 PCMU/8000
+a=rtpmap:101 telephone-event/8000
+a=sendrecv
+a=rtcp:PORT
+a=ptime:20
+SDP
+
+answer('SDP attr manipulations - remove a=fmtp line for media audio', { ICE => 'remove' }, <<SDP);
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.3
+s=tester
+t=0 0
+m=audio 2002 RTP/SAVP 0
+c=IN IP4 198.51.100.3
+a=sendrecv
+--------------------------------------
+v=0
+o=- 1545997027 1 IN IP4 198.51.100.3
+s=tester
+t=0 0
+m=audio PORT RTP/SAVP 0
+c=IN IP4 203.0.113.1
+a=rtpmap:0 PCMU/8000
+a=sendrecv
+a=rtcp:PORT
+a=ptime:20
+SDP
 
 # codec masking gh#664