diff --git a/scripts/dtls13.test b/scripts/dtls13.test
index 30bcd079a..2d6f58714 100755
--- a/scripts/dtls13.test
+++ b/scripts/dtls13.test
@@ -24,6 +24,7 @@ trap cleanup err exit
 
 WOLFSSL_ROOT=${WOLFSSL_ROOT:-$(pwd)}
 UDP_PROXY_BIN=${UDP_PROXY_BIN:-"udp_proxy"}
+DTLS_VERSION=${DTLS_VERSION:-"-v4"}
 PROXY_PORT=1234
 SERVER_PORT=4321
 KEY_UPDATE_SIZE=35
@@ -37,13 +38,13 @@ prepend() { # Usage: cmd 2>&1 | prepend "sometext "
 }
 
 run_test() { # usage: run_test "<udp-proxy args>" "<server args>" "<client args>"
-    stdbuf -oL -eL $WOLFSSL_ROOT/examples/server/server -u -p$SERVER_PORT $2 2>&1 | prepend "[server] " &
+    stdbuf -oL -eL $WOLFSSL_ROOT/examples/server/server -u -p$SERVER_PORT $DTLS_VERSION $2 2>&1 | prepend "[server] " &
     SERVER_PID=$!
     stdbuf -oL -eL $UDP_PROXY_BIN -p $PROXY_PORT -s 127.0.0.1:$SERVER_PORT -u $1 2>&1 | prepend "[udp-proxy] " &
     UDP_PROXY_PID=$(($! - 1))
     echo "UDP-proxy: $UDP_PROXY_PID"
     sleep 0.2
-    timeout -s KILL 5m stdbuf -oL -eL $WOLFSSL_ROOT/examples/client/client -u -p$PROXY_PORT $3 2>&1 | prepend "[client] "
+    timeout -s KILL 5m stdbuf -oL -eL $WOLFSSL_ROOT/examples/client/client -u -p$PROXY_PORT $DTLS_VERSION $3 2>&1 | prepend "[client] "
     if [ $? != 0 ]; then
         echo "Test failed"
         ((NUM_TESTS_FAILED++))
@@ -58,20 +59,20 @@ run_test() { # usage: run_test "<udp-proxy args>" "<server args>" "<client args>
 test_dropping_packets () {
     for i in $(seq 3 11);do
         echo -e "\ndropping ${i}th packet\n"
-        run_test "-d $i" "-v4 -Ta" "-v4"
+        run_test "-d $i" "-Ta" ""
     done
 
     # dropping last ack would be client error as wolfssl_read doesn't support WANT_WRITE as returned error
     for i in $(seq 0 10);do
         echo -e "\nTesting WANT_WRITE: dropping packet $i\n"
-        run_test "-f $i" "-v4 -Ta -6" "-v4 -6"
+        run_test "-f $i" "-Ta -6" "-6"
     done
 }
 
 # this test is based on detecting newSessionTicket message by its size. This is rather fragile.
 test_dropping_new_session_ticket() { # usage: test_dropping_new_session_ticket <size>
     echo -e "\ndropping new session ticket packet of size $1\n"
-    run_test "-F $1" "-v4 -w" "-v4 -w --waitTicket"
+    run_test "-F $1" "-w" "-w --waitTicket"
 }
 
 test_permutations () {
@@ -86,7 +87,7 @@ EOF
         echo -e "\nTesting $SIDE permutations order $i...\n"
         UDP_LOGFILE=/tmp/udp-$SIDE-$i
         rm -f $UDP_LOGFILE
-        run_test "-r $i -S $SIDE -l $UDP_LOGFILE" "-v4 -Ta -w" "-v4 -w"
+        run_test "-r $i -S $SIDE -l $UDP_LOGFILE" "-Ta -w" "-w"
         echo "...produced $(grep -P 'client:|server:' $UDP_LOGFILE | wc -l) messages"
     done
     echo "All $SIDE msg permutations succeeded"
@@ -108,13 +109,13 @@ EOF
         echo -e "\nTesting delay $DELAY...\n"
         UDP_LOGFILE=/tmp/udp-delay-$DELAY
         rm -f $UDP_LOGFILE
-        run_test "-l $UDP_LOGFILE -t $DELAY" "-v4 -Ta -w" "-v4 -w"
+        run_test "-l $UDP_LOGFILE -t $DELAY" "-Ta -w" "-w"
         echo "...produced $(grep -P 'client:|server:' $UDP_LOGFILE | wc -l) messages"
     done
 }
 
 echo "Starting capture"
-tcpdump -i lo -n port ${SERVER_PORT} -w ./dtls.pcap -U &
+tcpdump -i lo -n port ${SERVER_PORT} -w ./dtls${DTLS_VERSION}.pcap -U &
 TCPDUMP_PID=$!
 
 test_dropping_packets