diff --git a/bin/check.sh b/bin/check.sh
index d2dc9822..ca7ee1ba 100755
--- a/bin/check.sh
+++ b/bin/check.sh
@@ -801,7 +801,7 @@ if ! "$SKIP_RUNSIPP" ; then
   fi
 
   echo "$(date) - check RTP sessions, wait 5 secs first"
-  sleep 5
+  sleep 2
   check_rtp
 fi
 
diff --git a/bin/config_debug.pl b/bin/config_debug.pl
index c4dcffae..265f4e56 100755
--- a/bin/config_debug.pl
+++ b/bin/config_debug.pl
@@ -92,7 +92,7 @@ sub change_config
   $yaml->{witnessd}{gather}{sip_responsiveness} = 'no';
   $yaml->{security}->{ngcp_panel}->{scripts}->{restapi}->{sslverify} = 'no';
   $yaml->{mediator}{interval} = '1';      # Necessary to speedup the creation of the CDRs
-  $yaml->{rtpproxy}{delete_delay} = '2';  # Necessary to speedup the deletetion of the used ports in rtpengine
+  $yaml->{rtpproxy}{delete_delay} = '1';  # Necessary to speedup the deletetion of the used ports in rtpengine
   $yaml->{rtpproxy}{log_level} = '7';
   $yaml->{modules}[0]->{enable} = 'yes'; # dummy module should be the first one
 
diff --git a/run_tests.sh b/run_tests.sh
index 17679733..55f3d55e 100755
--- a/run_tests.sh
+++ b/run_tests.sh
@@ -426,6 +426,7 @@ fi
 # - tcpdump to capture all the packages
 # - kamailio to write all the json files
 # - rtpengine to close rtp ports
+# - write all the CDRs
 sleep 6
 
 # Check if there are still some rtp port open after tests execution
@@ -461,7 +462,6 @@ if "${FIX_RETRANS}" ; then
 fi
 
 if "${CDR}" ; then
-  sleep 2
   cdr_export
 fi