diff --git a/scenarios/invite_offline_deregistered/sipp_scenario_responder00_test.yml.tt2 b/scenarios/invite_offline_deregistered/sipp_scenario_responder00_test.yml.tt2
index f448a652..4a4addf7 100644
--- a/scenarios/invite_offline_deregistered/sipp_scenario_responder00_test.yml.tt2
+++ b/scenarios/invite_offline_deregistered/sipp_scenario_responder00_test.yml.tt2
@@ -6,3 +6,9 @@ messages:
   - 'WWW-Authenticate: Digest realm="invite-offline-deregistered.scenarios.test", nonce="[^"]+"'
   - 'Server: Sipwise NGCP Proxy'
   - 'Content-Length:\s+0'
+- - 'SIP/2.0 200 OK'
+  - 'From: <sip:[% scenarios.0.responders.0.username %]@invite-offline-deregistered.scenarios.test>;tag=[\w-]+'
+  - 'To: <sip:[% scenarios.0.responders.0.username %]@invite-offline-deregistered.scenarios.test>;tag=[\w-]+'
+  - 'CSeq: \d+ REGISTER'
+  - 'Server: Sipwise NGCP Proxy'
+  - 'Content-Length:\s+0'