diff --git a/testssl.sh b/testssl.sh
index 66c8a3c..51d5f88 100755
--- a/testssl.sh
+++ b/testssl.sh
@@ -16896,7 +16896,7 @@ run_renego() {
      local hint=""
      local jsonID=""
      local ssl_reneg_attempts=$SSL_RENEG_ATTEMPTS
-     # No SNI needed here as there won't be two different SSL stacks for one IP
+     # In cases where there's no default host configured we need SNI here as openssl then would return otherwise an error and the test will fail
 
      "$HAS_TLS13" && [[ -z "$proto" ]] && proto="-no_tls1_3"
 
@@ -16913,7 +16913,7 @@ run_renego() {
           fileout "$jsonID" "OK" "TLS 1.3 only server" "$cve" "$cwe"
      else
           # first fingerprint for the Line "Secure Renegotiation IS NOT" or "Secure Renegotiation IS "
-          $OPENSSL s_client $(s_client_options "$proto $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY") 2>&1 </dev/null >$TMPFILE 2>$ERRFILE
+          $OPENSSL s_client $(s_client_options "$proto $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY $SNI") 2>&1 </dev/null >$TMPFILE 2>$ERRFILE
           if sclient_connect_successful $? $TMPFILE; then
                grep -iaq "Secure Renegotiation IS NOT" $TMPFILE
                sec_renego=$?                                                    # 0= Secure Renegotiation IS NOT supported
@@ -16982,7 +16982,7 @@ run_renego() {
      else
           # We need up to two tries here, as some LiteSpeed servers don't answer on "R" and block. Thus first try in the background
           # msg enables us to look deeper into it while debugging
-          echo R | $OPENSSL s_client $(s_client_options "$proto $BUGS $legacycmd $STARTTLS -connect $NODEIP:$PORT $PROXY") >$TMPFILE 2>>$ERRFILE &
+          echo R | $OPENSSL s_client $(s_client_options "$proto $BUGS $legacycmd $STARTTLS -connect $NODEIP:$PORT $PROXY $SNI") >$TMPFILE 2>>$ERRFILE &
           wait_kill $! $HEADER_MAXSLEEP
           if [[ $? -eq 3 ]]; then
                pr_svrty_good "likely not vulnerable (OK)"; outln ", timed out"        # it hung
@@ -16990,7 +16990,7 @@ run_renego() {
                sec_client_renego=1
           else
                # second try in the foreground as we are sure now it won't hang
-               echo R | $OPENSSL s_client $(s_client_options "$proto $legacycmd $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY") >$TMPFILE 2>>$ERRFILE
+               echo R | $OPENSSL s_client $(s_client_options "$proto $legacycmd $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY $SNI") >$TMPFILE 2>>$ERRFILE
                sec_client_renego=$?
                # 0 means client is renegotiating & doesn't return an error --> vuln!
                # 1 means client tried to renegotiating but the server side errored then. You still see RENEGOTIATING in the output
@@ -17011,7 +17011,7 @@ run_renego() {
                               fileout "$jsonID" "MEDIUM" "VULNERABLE, potential DoS threat" "$cve" "$cwe" "$hint"
                          else
                               (for ((i=0; i < ssl_reneg_attempts; i++ )); do echo R; sleep 1; done) | \
-                                   $OPENSSL s_client $(s_client_options "$proto $legacycmd $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY") >$TMPFILE 2>>$ERRFILE
+                                   $OPENSSL s_client $(s_client_options "$proto $legacycmd $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY $SNI") >$TMPFILE 2>>$ERRFILE
                               case $? in
                                    0) pr_svrty_high "VULNERABLE (NOT ok)"; outln ", DoS threat ($ssl_reneg_attempts attempts)"
                                       fileout "$jsonID" "HIGH" "VULNERABLE, DoS threat" "$cve" "$cwe" "$hint"