diff --git a/include/tests_firewalls b/include/tests_firewalls
index fb8a731c..b4605cdd 100644
--- a/include/tests_firewalls
+++ b/include/tests_firewalls
@@ -114,6 +114,7 @@
         do
             ${IPTABLESBINARY} -t "${IPTABLES_TABLE}" --list-rules --wait 1 2>/dev/zero |
             {
+                IPTABLES_OUTPUT_QUEUE=""
                 while IFS="$(printf '\n')" read -r IPTABLES_LINES
                 do
                     set -- ${IPTABLES_LINES}
@@ -143,11 +144,11 @@
                         then
                             if [ "${IPTABLES_TARGET}" = "ACCEPT" ]
                             then
-                                IPTABLES_OUTPUT_QUEUE="${IPTABLES_OUTPUT_QUEUE}\n${IPTABLES_TABLE} ${IPTABLES_CHAIN} ${IPTABLES_TARGET} YELLOW"
+                                IPTABLES_OUTPUT_QUEUE="${IPTABLES_OUTPUT_QUEUE} ${IPTABLES_TABLE} ${IPTABLES_CHAIN} ${IPTABLES_TARGET} YELLOW"
                                 AddHP 1 3
                             elif [ "${IPTABLES_TARGET}" = "DROP" ]
                             then
-                                IPTABLES_OUTPUT_QUEUE="${IPTABLES_OUTPUT_QUEUE}\n${IPTABLES_TABLE} ${IPTABLES_CHAIN} ${IPTABLES_TARGET} GREEN"
+                                IPTABLES_OUTPUT_QUEUE="${IPTABLES_OUTPUT_QUEUE} ${IPTABLES_TABLE} ${IPTABLES_CHAIN} ${IPTABLES_TARGET} GREEN"
                                 AddHP 3 3
                             fi
                         fi
@@ -155,7 +156,7 @@
                         then
                             if [ "${IPTABLES_TARGET}" = "NFQUEUE" ]
                             then
-                                IPTABLES_OUTPUT_QUEUE="${IPTABLES_OUTPUT_QUEUE}\n${IPTABLES_TABLE} ${IPTABLES_CHAIN} ${IPTABLES_TARGET} RED"
+                                IPTABLES_OUTPUT_QUEUE="${IPTABLES_OUTPUT_QUEUE} ${IPTABLES_TABLE} ${IPTABLES_CHAIN} ${IPTABLES_TARGET} RED"
                                 AddHP 0 3
                             fi
                         fi