diff --git a/scenarios/incoming_foreign_dom/0007_test.yml.tt2 b/scenarios/incoming_foreign_dom/0007_test.yml.tt2
index d4e2e5fd..f33eef29 100644
--- a/scenarios/incoming_foreign_dom/0007_test.yml.tt2
+++ b/scenarios/incoming_foreign_dom/0007_test.yml.tt2
@@ -5,7 +5,7 @@ flow:
   - start|ROUTE_PRX_REQUEST:
   - start|ROUTE_OUTBOUND:
 sip_in:
-  - '^ACK sip:127.0.0.1:5080 SIP/2.0'
+  - '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:external@'
   - 'CSeq: 1 ACK'
   - 'Max-Forwards: 69'
@@ -15,7 +15,7 @@ sip_in:
 
 sip_out:
   - [
-      '^ACK sip:127.0.0.1:5080 SIP/2.0',
+      '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:external@',
       'CSeq: 1 ACK',
       'Max-Forwards: 68',
diff --git a/scenarios/incoming_foreign_dom/0008_test.yml.tt2 b/scenarios/incoming_foreign_dom/0008_test.yml.tt2
index 9710778c..874295fe 100644
--- a/scenarios/incoming_foreign_dom/0008_test.yml.tt2
+++ b/scenarios/incoming_foreign_dom/0008_test.yml.tt2
@@ -11,7 +11,7 @@ flow:
   - start|REPLY_ROUTE_NAT:
   - exit|REPLY_ROUTE_NAT:
 sip_in:
-  - '^BYE sip:127.0.0.1:5080 SIP/2.0'
+  - '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:external@'
   - 'CSeq: 2 BYE'
   - 'Max-Forwards: 69'
@@ -27,7 +27,7 @@ sip_out:
       'To: <sip:4311003@'
     ]
   - [
-      '^BYE sip:127.0.0.1:5080 SIP/2.0',
+      '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:external@',
       'CSeq: 2 BYE',
       'Max-Forwards: 68',
diff --git a/scenarios/incoming_peer/0007_test.yml.tt2 b/scenarios/incoming_peer/0007_test.yml.tt2
index 6ac47525..79fcb77f 100644
--- a/scenarios/incoming_peer/0007_test.yml.tt2
+++ b/scenarios/incoming_peer/0007_test.yml.tt2
@@ -5,7 +5,7 @@ flow:
   - start|ROUTE_PRX_REQUEST:
   - start|ROUTE_OUTBOUND:
 sip_in:
-  - '^ACK sip:127.0.0.1:5080 SIP/2.0'
+  - '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:004321001@'
   - 'CSeq: 1 ACK'
   - 'Max-Forwards: 69'
@@ -15,7 +15,7 @@ sip_in:
 
 sip_out:
   - [
-      '^ACK sip:127.0.0.1:5080 SIP/2.0',
+      '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:004321001@',
       'CSeq: 1 ACK',
       'Max-Forwards: 68',
diff --git a/scenarios/incoming_peer/0008_test.yml.tt2 b/scenarios/incoming_peer/0008_test.yml.tt2
index 57c8ab5b..ee4647d7 100644
--- a/scenarios/incoming_peer/0008_test.yml.tt2
+++ b/scenarios/incoming_peer/0008_test.yml.tt2
@@ -12,7 +12,7 @@ flow:
   - start|REPLY_ROUTE_NAT:
   - exit|REPLY_ROUTE_NAT:
 sip_in:
-  - '^BYE sip:127.0.0.1:5080 SIP/2.0'
+  - '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:004321001@'
   - 'CSeq: 2 BYE'
   - 'Max-Forwards: 69'
@@ -28,7 +28,7 @@ sip_out:
       'To: <sip:4311003@'
     ]
   - [
-      '^BYE sip:127.0.0.1:5080 SIP/2.0',
+      '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:004321001@',
       'CSeq: 2 BYE',
       'Max-Forwards: 68',
diff --git a/scenarios/invite/0009_test.yml.tt2 b/scenarios/invite/0009_test.yml.tt2
index 92d85e13..eaa4770a 100644
--- a/scenarios/invite/0009_test.yml.tt2
+++ b/scenarios/invite/0009_test.yml.tt2
@@ -6,7 +6,7 @@ flow:
   - start|ROUTE_PRX_REQUEST:
   - start|ROUTE_OUTBOUND:
 sip_in:
-  - '^ACK sip:127.0.0.1:5080 SIP/2.0'
+  - '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 2 ACK'
   - 'Max-Forwards: 69'
@@ -16,7 +16,7 @@ sip_in:
 
 sip_out:
   - [
-      '^ACK sip:127.0.0.1:5080 SIP/2.0',
+      '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 2 ACK',
       'Max-Forwards: 68',
diff --git a/scenarios/invite/0010_test.yml.tt2 b/scenarios/invite/0010_test.yml.tt2
index c8d2b1f8..63e3aa00 100644
--- a/scenarios/invite/0010_test.yml.tt2
+++ b/scenarios/invite/0010_test.yml.tt2
@@ -12,7 +12,7 @@ flow:
   - start|REPLY_ROUTE_NAT:
   - exit|REPLY_ROUTE_NAT:
 sip_in:
-  - '^BYE sip:127.0.0.1:5080 SIP/2.0'
+  - '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 3 BYE'
   - 'Max-Forwards: 69'
@@ -29,7 +29,7 @@ sip_out:
       'To: <sip:testuser1003@'
     ]
   - [
-      '^BYE sip:127.0.0.1:5080 SIP/2.0',
+      '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 3 BYE',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_allowedcli_match/0009_test.yml.tt2 b/scenarios/invite_allowedcli_match/0009_test.yml.tt2
index 1ada6b13..e85af29e 100644
--- a/scenarios/invite_allowedcli_match/0009_test.yml.tt2
+++ b/scenarios/invite_allowedcli_match/0009_test.yml.tt2
@@ -6,7 +6,7 @@ flow:
   - start|ROUTE_PRX_REQUEST:
   - start|ROUTE_OUTBOUND:
 sip_in:
-  - '^ACK sip:127.0.0.1:5080 SIP/2.0'
+  - '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 2 ACK'
   - 'Max-Forwards: 69'
@@ -16,7 +16,7 @@ sip_in:
 
 sip_out:
   - [
-      '^ACK sip:127.0.0.1:5080 SIP/2.0',
+      '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 2 ACK',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_allowedcli_match/0010_test.yml.tt2 b/scenarios/invite_allowedcli_match/0010_test.yml.tt2
index 0e1a7b58..bcc9e8ae 100644
--- a/scenarios/invite_allowedcli_match/0010_test.yml.tt2
+++ b/scenarios/invite_allowedcli_match/0010_test.yml.tt2
@@ -12,7 +12,7 @@ flow:
   - start|REPLY_ROUTE_NAT:
   - exit|REPLY_ROUTE_NAT:
 sip_in:
-  - '^BYE sip:127.0.0.1:5080 SIP/2.0'
+  - '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 3 BYE'
   - 'Max-Forwards: 69'
@@ -29,7 +29,7 @@ sip_out:
       'To: <sip:testuser1003@'
     ]
   - [
-      '^BYE sip:127.0.0.1:5080 SIP/2.0',
+      '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 3 BYE',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_allowedcli_match_alias/0009_test.yml.tt2 b/scenarios/invite_allowedcli_match_alias/0009_test.yml.tt2
index 8c8000f6..b4ab0ebd 100644
--- a/scenarios/invite_allowedcli_match_alias/0009_test.yml.tt2
+++ b/scenarios/invite_allowedcli_match_alias/0009_test.yml.tt2
@@ -6,7 +6,7 @@ flow:
   - start|ROUTE_PRX_REQUEST:
   - start|ROUTE_OUTBOUND:
 sip_in:
-  - '^ACK sip:127.0.0.1:5080 SIP/2.0'
+  - '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 2 ACK'
   - 'Max-Forwards: 69'
@@ -16,7 +16,7 @@ sip_in:
 
 sip_out:
   - [
-      '^ACK sip:127.0.0.1:5080 SIP/2.0',
+      '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 2 ACK',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_allowedcli_match_alias/0010_test.yml.tt2 b/scenarios/invite_allowedcli_match_alias/0010_test.yml.tt2
index 381b30dc..c286665a 100644
--- a/scenarios/invite_allowedcli_match_alias/0010_test.yml.tt2
+++ b/scenarios/invite_allowedcli_match_alias/0010_test.yml.tt2
@@ -12,7 +12,7 @@ flow:
   - start|REPLY_ROUTE_NAT:
   - exit|REPLY_ROUTE_NAT:
 sip_in:
-  - '^BYE sip:127.0.0.1:5080 SIP/2.0'
+  - '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 3 BYE'
   - 'Max-Forwards: 69'
@@ -29,7 +29,7 @@ sip_out:
       'To: <sip:testuser1003@'
     ]
   - [
-      '^BYE sip:127.0.0.1:5080 SIP/2.0',
+      '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 3 BYE',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_allowedcli_nonmatch/0009_test.yml.tt2 b/scenarios/invite_allowedcli_nonmatch/0009_test.yml.tt2
index 7dbcbaa7..bb2a9c03 100644
--- a/scenarios/invite_allowedcli_nonmatch/0009_test.yml.tt2
+++ b/scenarios/invite_allowedcli_nonmatch/0009_test.yml.tt2
@@ -6,7 +6,7 @@ flow:
   - start|ROUTE_PRX_REQUEST:
   - start|ROUTE_OUTBOUND:
 sip_in:
-  - '^ACK sip:127.0.0.1:5080 SIP/2.0'
+  - '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 2 ACK'
   - 'Max-Forwards: 69'
@@ -16,7 +16,7 @@ sip_in:
 
 sip_out:
   - [
-      '^ACK sip:127.0.0.1:5080 SIP/2.0',
+      '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 2 ACK',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_allowedcli_nonmatch/0010_test.yml.tt2 b/scenarios/invite_allowedcli_nonmatch/0010_test.yml.tt2
index fe4d6660..1c888485 100644
--- a/scenarios/invite_allowedcli_nonmatch/0010_test.yml.tt2
+++ b/scenarios/invite_allowedcli_nonmatch/0010_test.yml.tt2
@@ -12,7 +12,7 @@ flow:
   - start|REPLY_ROUTE_NAT:
   - exit|REPLY_ROUTE_NAT:
 sip_in:
-  - '^BYE sip:127.0.0.1:5080 SIP/2.0'
+  - '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 3 BYE'
   - 'Max-Forwards: 69'
@@ -29,7 +29,7 @@ sip_out:
       'To: <sip:testuser1003@'
     ]
   - [
-      '^BYE sip:127.0.0.1:5080 SIP/2.0',
+      '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 3 BYE',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_blockout_pinoverride/0009_test.yml.tt2 b/scenarios/invite_blockout_pinoverride/0009_test.yml.tt2
index 618c483f..12b21e9f 100644
--- a/scenarios/invite_blockout_pinoverride/0009_test.yml.tt2
+++ b/scenarios/invite_blockout_pinoverride/0009_test.yml.tt2
@@ -6,7 +6,7 @@ flow:
   - start|ROUTE_PRX_REQUEST:
   - start|ROUTE_OUTBOUND:
 sip_in:
-  - '^ACK sip:127.0.0.1:5080 SIP/2.0'
+  - '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 2 ACK'
   - 'Max-Forwards: 69'
@@ -16,7 +16,7 @@ sip_in:
 
 sip_out:
   - [
-      '^ACK sip:127.0.0.1:5080 SIP/2.0',
+      '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 2 ACK',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_blockout_pinoverride/0010_test.yml.tt2 b/scenarios/invite_blockout_pinoverride/0010_test.yml.tt2
index 0ed1c5d7..cdec3605 100644
--- a/scenarios/invite_blockout_pinoverride/0010_test.yml.tt2
+++ b/scenarios/invite_blockout_pinoverride/0010_test.yml.tt2
@@ -12,7 +12,7 @@ flow:
   - start|REPLY_ROUTE_NAT:
   - exit|REPLY_ROUTE_NAT:
 sip_in:
-  - '^BYE sip:127.0.0.1:5080 SIP/2.0'
+  - '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 3 BYE'
   - 'Max-Forwards: 69'
@@ -29,7 +29,7 @@ sip_out:
       'To: <sip:\*80\*4444311003@'
     ]
   - [
-      '^BYE sip:127.0.0.1:5080 SIP/2.0',
+      '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 3 BYE',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_callforward/0017_test.yml.tt2 b/scenarios/invite_callforward/0017_test.yml.tt2
index afe0a349..45facc33 100644
--- a/scenarios/invite_callforward/0017_test.yml.tt2
+++ b/scenarios/invite_callforward/0017_test.yml.tt2
@@ -6,7 +6,7 @@ flow:
   - start|ROUTE_PRX_REQUEST:
   - start|ROUTE_OUTBOUND:
 sip_in:
-  - '^ACK sip:127.0.0.1:5080 SIP/2.0'
+  - '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 2 ACK'
   - 'Max-Forwards: 69'
@@ -16,7 +16,7 @@ sip_in:
 
 sip_out:
   - [
-      '^ACK sip:127.0.0.1:5080 SIP/2.0',
+      '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 2 ACK',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_foreign_dom/0007_test.yml.tt2 b/scenarios/invite_foreign_dom/0007_test.yml.tt2
index 00b39c82..a8cbf054 100644
--- a/scenarios/invite_foreign_dom/0007_test.yml.tt2
+++ b/scenarios/invite_foreign_dom/0007_test.yml.tt2
@@ -5,7 +5,7 @@ flow:
   - start|ROUTE_PRX_REQUEST:
   - start|ROUTE_OUTBOUND:
 sip_in:
-  - '^ACK sip:127.0.0.1:5080 SIP/2.0'
+  - '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 2 ACK'
   - 'Max-Forwards: 69'
@@ -15,7 +15,7 @@ sip_in:
 
 sip_out:
   - [
-      '^ACK sip:127.0.0.1:5080 SIP/2.0',
+      '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 2 ACK',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_foreign_dom/0008_test.yml.tt2 b/scenarios/invite_foreign_dom/0008_test.yml.tt2
index 02de90e0..4d2c7d6a 100644
--- a/scenarios/invite_foreign_dom/0008_test.yml.tt2
+++ b/scenarios/invite_foreign_dom/0008_test.yml.tt2
@@ -12,7 +12,7 @@ flow:
   - start|REPLY_ROUTE_NAT:
   - exit|REPLY_ROUTE_NAT:
 sip_in:
-  - '^BYE sip:127.0.0.1:5080 SIP/2.0'
+  - '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 3 BYE'
   - 'Max-Forwards: 69'
@@ -29,7 +29,7 @@ sip_out:
       'To: <sip:004321001@'
     ]
   - [
-      '^BYE sip:127.0.0.1:5080 SIP/2.0',
+      '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 3 BYE',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_ignore_allowip/0009_test.yml.tt2 b/scenarios/invite_ignore_allowip/0009_test.yml.tt2
index 92d85e13..eaa4770a 100644
--- a/scenarios/invite_ignore_allowip/0009_test.yml.tt2
+++ b/scenarios/invite_ignore_allowip/0009_test.yml.tt2
@@ -6,7 +6,7 @@ flow:
   - start|ROUTE_PRX_REQUEST:
   - start|ROUTE_OUTBOUND:
 sip_in:
-  - '^ACK sip:127.0.0.1:5080 SIP/2.0'
+  - '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 2 ACK'
   - 'Max-Forwards: 69'
@@ -16,7 +16,7 @@ sip_in:
 
 sip_out:
   - [
-      '^ACK sip:127.0.0.1:5080 SIP/2.0',
+      '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 2 ACK',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_ignore_allowip/0010_test.yml.tt2 b/scenarios/invite_ignore_allowip/0010_test.yml.tt2
index c8d2b1f8..63e3aa00 100644
--- a/scenarios/invite_ignore_allowip/0010_test.yml.tt2
+++ b/scenarios/invite_ignore_allowip/0010_test.yml.tt2
@@ -12,7 +12,7 @@ flow:
   - start|REPLY_ROUTE_NAT:
   - exit|REPLY_ROUTE_NAT:
 sip_in:
-  - '^BYE sip:127.0.0.1:5080 SIP/2.0'
+  - '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 3 BYE'
   - 'Max-Forwards: 69'
@@ -29,7 +29,7 @@ sip_out:
       'To: <sip:testuser1003@'
     ]
   - [
-      '^BYE sip:127.0.0.1:5080 SIP/2.0',
+      '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 3 BYE',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_no_refer/0009_test.yml.tt2 b/scenarios/invite_no_refer/0009_test.yml.tt2
index 92d85e13..eaa4770a 100644
--- a/scenarios/invite_no_refer/0009_test.yml.tt2
+++ b/scenarios/invite_no_refer/0009_test.yml.tt2
@@ -6,7 +6,7 @@ flow:
   - start|ROUTE_PRX_REQUEST:
   - start|ROUTE_OUTBOUND:
 sip_in:
-  - '^ACK sip:127.0.0.1:5080 SIP/2.0'
+  - '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 2 ACK'
   - 'Max-Forwards: 69'
@@ -16,7 +16,7 @@ sip_in:
 
 sip_out:
   - [
-      '^ACK sip:127.0.0.1:5080 SIP/2.0',
+      '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 2 ACK',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_no_refer/0010_test.yml.tt2 b/scenarios/invite_no_refer/0010_test.yml.tt2
index c8d2b1f8..63e3aa00 100644
--- a/scenarios/invite_no_refer/0010_test.yml.tt2
+++ b/scenarios/invite_no_refer/0010_test.yml.tt2
@@ -12,7 +12,7 @@ flow:
   - start|REPLY_ROUTE_NAT:
   - exit|REPLY_ROUTE_NAT:
 sip_in:
-  - '^BYE sip:127.0.0.1:5080 SIP/2.0'
+  - '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 3 BYE'
   - 'Max-Forwards: 69'
@@ -29,7 +29,7 @@ sip_out:
       'To: <sip:testuser1003@'
     ]
   - [
-      '^BYE sip:127.0.0.1:5080 SIP/2.0',
+      '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 3 BYE',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_peerout/0007_test.yml.tt2 b/scenarios/invite_peerout/0007_test.yml.tt2
index acc8f33d..94ac559d 100644
--- a/scenarios/invite_peerout/0007_test.yml.tt2
+++ b/scenarios/invite_peerout/0007_test.yml.tt2
@@ -6,7 +6,7 @@ flow:
   - start|ROUTE_PRX_REQUEST:
   - start|ROUTE_OUTBOUND:
 sip_in:
-  - '^ACK sip:127.0.0.1:5080 SIP/2.0'
+  - '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 2 ACK'
   - 'Max-Forwards: 69'
@@ -16,7 +16,7 @@ sip_in:
 
 sip_out:
   - [
-      '^ACK sip:127.0.0.1:5080 SIP/2.0',
+      '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 2 ACK',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_peerout/0008_test.yml.tt2 b/scenarios/invite_peerout/0008_test.yml.tt2
index 02de90e0..4d2c7d6a 100644
--- a/scenarios/invite_peerout/0008_test.yml.tt2
+++ b/scenarios/invite_peerout/0008_test.yml.tt2
@@ -12,7 +12,7 @@ flow:
   - start|REPLY_ROUTE_NAT:
   - exit|REPLY_ROUTE_NAT:
 sip_in:
-  - '^BYE sip:127.0.0.1:5080 SIP/2.0'
+  - '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 3 BYE'
   - 'Max-Forwards: 69'
@@ -29,7 +29,7 @@ sip_out:
       'To: <sip:004321001@'
     ]
   - [
-      '^BYE sip:127.0.0.1:5080 SIP/2.0',
+      '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 3 BYE',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_peerout_rewrite/0007_test.yml.tt2 b/scenarios/invite_peerout_rewrite/0007_test.yml.tt2
index acc8f33d..94ac559d 100644
--- a/scenarios/invite_peerout_rewrite/0007_test.yml.tt2
+++ b/scenarios/invite_peerout_rewrite/0007_test.yml.tt2
@@ -6,7 +6,7 @@ flow:
   - start|ROUTE_PRX_REQUEST:
   - start|ROUTE_OUTBOUND:
 sip_in:
-  - '^ACK sip:127.0.0.1:5080 SIP/2.0'
+  - '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 2 ACK'
   - 'Max-Forwards: 69'
@@ -16,7 +16,7 @@ sip_in:
 
 sip_out:
   - [
-      '^ACK sip:127.0.0.1:5080 SIP/2.0',
+      '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 2 ACK',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_peerout_rewrite/0008_test.yml.tt2 b/scenarios/invite_peerout_rewrite/0008_test.yml.tt2
index 02de90e0..4d2c7d6a 100644
--- a/scenarios/invite_peerout_rewrite/0008_test.yml.tt2
+++ b/scenarios/invite_peerout_rewrite/0008_test.yml.tt2
@@ -12,7 +12,7 @@ flow:
   - start|REPLY_ROUTE_NAT:
   - exit|REPLY_ROUTE_NAT:
 sip_in:
-  - '^BYE sip:127.0.0.1:5080 SIP/2.0'
+  - '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 3 BYE'
   - 'Max-Forwards: 69'
@@ -29,7 +29,7 @@ sip_out:
       'To: <sip:004321001@'
     ]
   - [
-      '^BYE sip:127.0.0.1:5080 SIP/2.0',
+      '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 3 BYE',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_peerout_rewrite_pv_regex/0007_test.yml.tt2 b/scenarios/invite_peerout_rewrite_pv_regex/0007_test.yml.tt2
index ca3ab909..c9427b4c 100644
--- a/scenarios/invite_peerout_rewrite_pv_regex/0007_test.yml.tt2
+++ b/scenarios/invite_peerout_rewrite_pv_regex/0007_test.yml.tt2
@@ -6,7 +6,7 @@ flow:
   - start|ROUTE_PRX_REQUEST:
   - start|ROUTE_OUTBOUND:
 sip_in:
-  - '^ACK sip:127.0.0.1:5080 SIP/2.0'
+  - '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 2 ACK'
   - 'Max-Forwards: 69'
@@ -16,7 +16,7 @@ sip_in:
 
 sip_out:
   - [
-      '^ACK sip:127.0.0.1:5080 SIP/2.0',
+      '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 2 ACK',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_peerout_rewrite_pv_regex/0008_test.yml.tt2 b/scenarios/invite_peerout_rewrite_pv_regex/0008_test.yml.tt2
index 8a149fb4..33037bbb 100644
--- a/scenarios/invite_peerout_rewrite_pv_regex/0008_test.yml.tt2
+++ b/scenarios/invite_peerout_rewrite_pv_regex/0008_test.yml.tt2
@@ -12,7 +12,7 @@ flow:
   - start|REPLY_ROUTE_NAT:
   - exit|REPLY_ROUTE_NAT:
 sip_in:
-  - '^BYE sip:127.0.0.1:5080 SIP/2.0'
+  - '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 3 BYE'
   - 'Max-Forwards: 69'
@@ -29,7 +29,7 @@ sip_out:
       'To: <sip:004321001@'
     ]
   - [
-      '^BYE sip:127.0.0.1:5080 SIP/2.0',
+      '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 3 BYE',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_speeddial/0011_test.yml.tt2 b/scenarios/invite_speeddial/0011_test.yml.tt2
index 540abea2..7a6b2a24 100644
--- a/scenarios/invite_speeddial/0011_test.yml.tt2
+++ b/scenarios/invite_speeddial/0011_test.yml.tt2
@@ -6,7 +6,7 @@ flow:
   - start|ROUTE_PRX_REQUEST:
   - start|ROUTE_OUTBOUND:
 sip_in:
-  - '^ACK sip:127.0.0.1:5080 SIP/2.0'
+  - '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 2 ACK'
   - 'Max-Forwards: 69'
@@ -16,7 +16,7 @@ sip_in:
 
 sip_out:
   - [
-      '^ACK sip:127.0.0.1:5080 SIP/2.0',
+      '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 2 ACK',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_speeddial/0012_test.yml.tt2 b/scenarios/invite_speeddial/0012_test.yml.tt2
index 444e5805..02877b40 100644
--- a/scenarios/invite_speeddial/0012_test.yml.tt2
+++ b/scenarios/invite_speeddial/0012_test.yml.tt2
@@ -12,7 +12,7 @@ flow:
   - start|REPLY_ROUTE_NAT:
   - exit|REPLY_ROUTE_NAT:
 sip_in:
-  - '^BYE sip:127.0.0.1:5080 SIP/2.0'
+  - '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 3 BYE'
   - 'Max-Forwards: 69'
@@ -29,7 +29,7 @@ sip_out:
       'To: <sip:\*0@'
     ]
   - [
-      '^BYE sip:127.0.0.1:5080 SIP/2.0',
+      '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 3 BYE',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_speeddial/0020_test.yml.tt2 b/scenarios/invite_speeddial/0020_test.yml.tt2
index a5c11533..95f33892 100644
--- a/scenarios/invite_speeddial/0020_test.yml.tt2
+++ b/scenarios/invite_speeddial/0020_test.yml.tt2
@@ -6,7 +6,7 @@ flow:
   - start|ROUTE_PRX_REQUEST:
   - start|ROUTE_OUTBOUND:
 sip_in:
-  - '^ACK sip:127.0.0.1:5080 SIP/2.0'
+  - '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 2 ACK'
   - 'Max-Forwards: 69'
@@ -16,7 +16,7 @@ sip_in:
 
 sip_out:
   - [
-      '^ACK sip:127.0.0.1:5080 SIP/2.0',
+      '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 2 ACK',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_speeddial/0021_test.yml.tt2 b/scenarios/invite_speeddial/0021_test.yml.tt2
index ddc833f0..eb01c1ea 100644
--- a/scenarios/invite_speeddial/0021_test.yml.tt2
+++ b/scenarios/invite_speeddial/0021_test.yml.tt2
@@ -12,7 +12,7 @@ flow:
   - start|REPLY_ROUTE_NAT:
   - exit|REPLY_ROUTE_NAT:
 sip_in:
-  - '^BYE sip:127.0.0.1:5080 SIP/2.0'
+  - '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 3 BYE'
   - 'Max-Forwards: 69'
@@ -28,7 +28,7 @@ sip_out:
       'To: <sip:\*1@'
     ]
   - [
-      '^BYE sip:127.0.0.1:5080 SIP/2.0',
+      '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 3 BYE',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_tcp_udp/0009_test.yml.tt2 b/scenarios/invite_tcp_udp/0009_test.yml.tt2
index 4ae925bd..a53c4ccc 100644
--- a/scenarios/invite_tcp_udp/0009_test.yml.tt2
+++ b/scenarios/invite_tcp_udp/0009_test.yml.tt2
@@ -6,7 +6,7 @@ flow:
   - start|ROUTE_PRX_REQUEST:
   - start|ROUTE_OUTBOUND:
 sip_in:
-  - '^ACK sip:127.0.0.1:5080 SIP/2.0'
+  - '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 2 ACK'
   - 'Max-Forwards: 69'
@@ -16,7 +16,7 @@ sip_in:
 
 sip_out:
   - [
-      '^ACK sip:127.0.0.1:5080 SIP/2.0',
+      '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 2 ACK',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_tcp_udp/0010_test.yml.tt2 b/scenarios/invite_tcp_udp/0010_test.yml.tt2
index fa802748..24e4e911 100644
--- a/scenarios/invite_tcp_udp/0010_test.yml.tt2
+++ b/scenarios/invite_tcp_udp/0010_test.yml.tt2
@@ -12,7 +12,7 @@ flow:
   - start|REPLY_ROUTE_NAT:
   - exit|REPLY_ROUTE_NAT:
 sip_in:
-  - '^BYE sip:127.0.0.1:5080 SIP/2.0'
+  - '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 3 BYE'
   - 'Max-Forwards: 69'
@@ -29,7 +29,7 @@ sip_out:
       'To: <sip:testuser1003@'
     ]
   - [
-      '^BYE sip:127.0.0.1:5080 SIP/2.0',
+      '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 3 BYE',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_tcp_udp_reinvite/0009_test.yml.tt2 b/scenarios/invite_tcp_udp_reinvite/0009_test.yml.tt2
index da71d55a..8e8b5a48 100644
--- a/scenarios/invite_tcp_udp_reinvite/0009_test.yml.tt2
+++ b/scenarios/invite_tcp_udp_reinvite/0009_test.yml.tt2
@@ -6,7 +6,7 @@ flow:
   - start|ROUTE_OUTBOUND:
       $avp(proto): ["tcp"]
 sip_in:
-  - '^ACK sip:127.0.0.1:5080 SIP/2.0'
+  - '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: <sip:testuser1002@'
   - 'CSeq: 2 ACK'
   - 'Max-Forwards: 69'
@@ -16,7 +16,7 @@ sip_in:
 
 sip_out:
   - [
-      '^ACK sip:127.0.0.1:5080 SIP/2.0',
+      '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: <sip:testuser1002@',
       'CSeq: 2 ACK',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_tcp_udp_reinvite/0013_test.yml.tt2 b/scenarios/invite_tcp_udp_reinvite/0013_test.yml.tt2
index c5081bd3..6c6a9316 100644
--- a/scenarios/invite_tcp_udp_reinvite/0013_test.yml.tt2
+++ b/scenarios/invite_tcp_udp_reinvite/0013_test.yml.tt2
@@ -12,7 +12,7 @@ flow:
   - start|REPLY_ROUTE_NAT:
   - exit|REPLY_ROUTE_NAT:
 sip_in:
-  - '^BYE sip:127.0.0.1:5080 SIP/2.0'
+  - '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: <sip:testuser1002@'
   - 'CSeq: 11 BYE'
   - 'Max-Forwards: 69'
@@ -29,7 +29,7 @@ sip_out:
       'To: <sip:testuser1003@'
     ]
   - [
-      '^BYE sip:127.0.0.1:5080 SIP/2.0',
+      '^BYE sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: <sip:testuser1002@',
       'CSeq: 11 BYE',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_voicebox/0009_test.yml.tt2 b/scenarios/invite_voicebox/0009_test.yml.tt2
index af2682fe..aea096db 100644
--- a/scenarios/invite_voicebox/0009_test.yml.tt2
+++ b/scenarios/invite_voicebox/0009_test.yml.tt2
@@ -6,7 +6,7 @@ flow:
   - start|ROUTE_PRX_REQUEST:
   - start|ROUTE_OUTBOUND:
 sip_in:
-  - '^ACK sip:127.0.0.1:5080 SIP/2.0'
+  - '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 2 ACK'
   - 'Max-Forwards: 69'
@@ -15,7 +15,7 @@ sip_in:
   - 'To: <sip:testuser1001@'
 sip_out:
   - [
-      '^ACK sip:127.0.0.1:5080 SIP/2.0',
+      '^ACK sip:127.0.0.1:5080(;prxroute=1)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 2 ACK',
       'Max-Forwards: 68',
diff --git a/scenarios/invite_voicebox/0011_test.yml.tt2 b/scenarios/invite_voicebox/0011_test.yml.tt2
index e644ac7c..dd55cb68 100644
--- a/scenarios/invite_voicebox/0011_test.yml.tt2
+++ b/scenarios/invite_voicebox/0011_test.yml.tt2
@@ -14,7 +14,7 @@ flow:
   - exit|REPLY_ROUTE_NAT:
 [% END -%]
 sip_in:
-  - '^BYE sip:127.0.0.1:5080(;transport=udp)? SIP/2.0'
+  - '^BYE sip:127.0.0.1:5080(;prxroute=1)?(;transport=udp)? SIP/2.0'
   - 'Contact: sip:testuser1002@'
   - 'CSeq: 3 BYE'
   - 'Max-Forwards: 69'
@@ -31,7 +31,7 @@ sip_out:
       'To: <sip:testuser1001@'
     ]
   - [
-      '^BYE sip:127.0.0.1:5080(;transport=udp)? SIP/2.0',
+      '^BYE sip:127.0.0.1:5080(;prxroute=1)?(;transport=udp)? SIP/2.0',
       'Contact: sip:testuser1002@',
       'CSeq: 3 BYE',
       'Max-Forwards: 68',