diff --git a/scenarios/invite_concurrent_max/sipp_scenario00.xml b/scenarios/invite_concurrent_max/sipp_scenario00.xml
index 13b3c912..d948ae1c 100644
--- a/scenarios/invite_concurrent_max/sipp_scenario00.xml
+++ b/scenarios/invite_concurrent_max/sipp_scenario00.xml
@@ -113,7 +113,7 @@
     </action>
   </nop>
 
-  <pause milliseconds="1000"/>
+  <pause milliseconds="2000"/>
 
   <send start_rtd="4">
     <![CDATA[
diff --git a/scenarios/invite_concurrent_max/sipp_scenario_responder01.xml b/scenarios/invite_concurrent_max/sipp_scenario_responder01.xml
index 00a029ca..04218029 100644
--- a/scenarios/invite_concurrent_max/sipp_scenario_responder01.xml
+++ b/scenarios/invite_concurrent_max/sipp_scenario_responder01.xml
@@ -2,7 +2,7 @@
 
 <scenario name="Sipwise NGCP Benchmark UAC Caller">
 
-  <pause milliseconds="2000"/>
+  <pause milliseconds="2500"/>
 
   <send start_rtd="1" start_rtd="2">
     <![CDATA[
diff --git a/scenarios/invite_concurrent_max_out/sipp_scenario00.xml b/scenarios/invite_concurrent_max_out/sipp_scenario00.xml
index b925395f..b1fb644f 100644
--- a/scenarios/invite_concurrent_max_out/sipp_scenario00.xml
+++ b/scenarios/invite_concurrent_max_out/sipp_scenario00.xml
@@ -106,7 +106,7 @@
     ]]>
   </send>
 
-  <pause milliseconds="500"/>
+  <pause milliseconds="600"/>
 
   <send start_txn="reinvite0">
     <![CDATA[
@@ -164,7 +164,7 @@
     ]]>
   </send>
 
-  <pause milliseconds="500"/>
+  <pause milliseconds="600"/>
 
   <send start_txn="invite2">
     <![CDATA[
@@ -213,7 +213,7 @@
     ]]>
   </send>
 
-  <pause milliseconds="500"/>
+  <pause milliseconds="600"/>
 
   <send start_txn="invite3">
     <![CDATA[
@@ -273,7 +273,7 @@
     ]]>
   </send>
 
-  <pause milliseconds="500"/>
+  <pause milliseconds="600"/>
 
   <send start_txn="reinvite0">
     <![CDATA[
diff --git a/scenarios/invite_concurrent_max_out_per_account/sipp_scenario00.xml b/scenarios/invite_concurrent_max_out_per_account/sipp_scenario00.xml
index 6ff611de..a132af87 100644
--- a/scenarios/invite_concurrent_max_out_per_account/sipp_scenario00.xml
+++ b/scenarios/invite_concurrent_max_out_per_account/sipp_scenario00.xml
@@ -106,7 +106,7 @@
     ]]>
   </send>
 
-  <pause milliseconds="500"/>
+  <pause milliseconds="600"/>
 
   <send start_txn="reinvite0">
     <![CDATA[
@@ -164,7 +164,7 @@
     ]]>
   </send>
 
-  <pause milliseconds="500"/>
+  <pause milliseconds="600"/>
 
   <send start_txn="invite2">
     <![CDATA[
@@ -213,7 +213,7 @@
     ]]>
   </send>
 
-  <pause milliseconds="500"/>
+  <pause milliseconds="600"/>
 
   <send start_txn="invite3">
     <![CDATA[
@@ -273,7 +273,7 @@
     ]]>
   </send>
 
-  <pause milliseconds="500"/>
+  <pause milliseconds="600"/>
 
   <send start_txn="reinvite0">
     <![CDATA[
diff --git a/scenarios/invite_concurrent_max_per_account/sipp_scenario_responder01.xml b/scenarios/invite_concurrent_max_per_account/sipp_scenario_responder01.xml
index a4016fbe..7b0eb982 100644
--- a/scenarios/invite_concurrent_max_per_account/sipp_scenario_responder01.xml
+++ b/scenarios/invite_concurrent_max_per_account/sipp_scenario_responder01.xml
@@ -2,7 +2,7 @@
 
 <scenario name="Sipwise NGCP Benchmark UAC Caller">
 
-  <pause milliseconds="2400"/>
+  <pause milliseconds="2500"/>
 
   <send start_rtd="1" start_rtd="2">
     <![CDATA[
diff --git a/scenarios/invite_voicebox/sipp_scenario00.xml b/scenarios/invite_voicebox/sipp_scenario00.xml
index f0a5dc08..370039b7 100644
--- a/scenarios/invite_voicebox/sipp_scenario00.xml
+++ b/scenarios/invite_voicebox/sipp_scenario00.xml
@@ -116,7 +116,7 @@
     </action>
   </nop>
 
-  <pause milliseconds="500"/>
+  <pause milliseconds="1000"/>
 
   <send start_rtd="4">
     <![CDATA[