diff --git a/tests/access.ut b/tests/access.sh
similarity index 92%
rename from tests/access.ut
rename to tests/access.sh
index 400d575..c615732 100755
--- a/tests/access.ut
+++ b/tests/access.sh
@@ -1,13 +1,15 @@
 # OpenLAN Access UT.
 
-source $PWD/macro.ut
+source $PWD/macro.sh
 
-function setup() {
+setup_net() {
   docker network inspect net1 || {
     docker network create net1 \
       --driver=bridge --subnet=172.255.0.0/24 --gateway=172.255.0.1
   }
+}
 
+setup_sw1() {
   mkdir -p /opt/openlan/sw1
   mkdir -p /opt/openlan/sw1/etc/openlan/switch
   cat > /opt/openlan/sw1/etc/openlan/switch/switch.yaml <<EOF
@@ -29,7 +31,9 @@ EOF
   # Add users
   docker exec sw1 openlan user add --name t1@example --password 123456
   docker exec sw1 openlan user add --name t2@example --password 123457
+}
 
+setup_ac1() {
   mkdir -p /opt/openlan/sw1/etc/openlan/access
   # Start access: ac1
   cat > /opt/openlan/sw1/etc/openlan/access/t1.yaml <<EOF
@@ -48,6 +52,9 @@ EOF
     --name sw1.ac1 $IMAGE /usr/bin/openlan-access -conf /etc/openlan/access/t1.yaml
 
   wait "docker logs -f sw1.ac1" Worker.OnSuccess 30
+}
+
+setup_ac2() {
   # Start access: ac2
   cat > /opt/openlan/sw1/etc/openlan/access/t2.yaml <<EOF
 protocol: tcp
@@ -65,12 +72,22 @@ EOF
     --name sw1.ac2 $IMAGE /usr/bin/openlan-access -conf /etc/openlan/access/t2.yaml
 
   wait "docker logs -f sw1.ac2" Worker.OnSuccess
+}
 
+ping() {
   wait "docker exec sw1.ac1 ping -c 3 172.11.0.1" "3 received" 5
   wait "docker exec sw1.ac1 ping -c 3 172.11.0.12" "3 received" 5
 }
 
-function cleanup() {
+setup() {
+  setup_net
+  setup_sw1
+  setup_ac1
+  setup_ac2
+  ping
+}
+
+cleanup() {
   # Stop containd
   docker stop sw1.ac1
   docker stop sw1.ac2
@@ -80,8 +97,4 @@ function cleanup() {
   rm -rvf /opt/openlan/sw1
 }
 
-setup
-if [[ $PAUSE == true ]]; then
-  pause
-fi
-cleanup
+main
\ No newline at end of file
diff --git a/tests/macro.ut b/tests/macro.sh
similarity index 82%
rename from tests/macro.ut
rename to tests/macro.sh
index 5047868..a6a8701 100644
--- a/tests/macro.ut
+++ b/tests/macro.sh
@@ -5,11 +5,11 @@ export ARCH=amd64
 export VERSION=unknown
 
 ## functions
-function version() {
+version() {
   $PWD/../dist/version.sh
 }
 
-function flush() {
+flush() {
   local out=$1
 
   while IFS= read -r line; do
@@ -17,7 +17,7 @@ function flush() {
   done
 }
 
-function wait() {
+wait() {
   set +x
   local cmd=$1; local match=$2
   local count=$3; local code=1
@@ -52,10 +52,18 @@ function wait() {
   return $code
 }
 
-function pause() {
+pause() {
   echo "Press ENTER to continue: "
   read
 }
 
 export VERSION=$(version)
-export IMAGE="luscis/openlan:$VERSION.$ARCH.deb"
\ No newline at end of file
+export IMAGE="luscis/openlan:$VERSION.$ARCH.deb"
+
+main() {
+  setup
+  if [[ $PAUSE == true ]]; then
+    pause
+  fi
+  cleanup
+}
\ No newline at end of file
diff --git a/tests/run.sh b/tests/run.sh
index 6f52eff..0467333 100755
--- a/tests/run.sh
+++ b/tests/run.sh
@@ -4,7 +4,7 @@ set -ex
 
 pushd $(dirname $0)
 
-source access.ut
-source switch.ut
+source access.sh
+source switch.sh
 
 popd
\ No newline at end of file
diff --git a/tests/switch.sh b/tests/switch.sh
new file mode 100755
index 0000000..e3ae7e4
--- /dev/null
+++ b/tests/switch.sh
@@ -0,0 +1,88 @@
+# OpenLAN Access UT.
+
+source $PWD/macro.sh
+
+network_name=net1
+
+setup_net() {
+  docker network inspect $network_name|| {
+    docker network create $network_name\
+      --driver=bridge --subnet=172.255.0.0/24 --gateway=172.255.0.1
+  }
+}
+
+setup_sw1() {
+  local name=sw1
+  local address=172.255.0.2
+
+  mkdir -p /opt/openlan/$name
+  mkdir -p /opt/openlan/$name/etc/openlan/switch
+  cat > /opt/openlan/$name/etc/openlan/switch/switch.yaml <<EOF
+protocol: tcp
+crypt:
+  algorithm: aes-128
+  secret: ea64d5b0c96c
+EOF
+
+  # Start switch:
+  docker run -d --rm --privileged --network $network_name --ip $address \
+    --volume /opt/openlan/$name/etc/openlan:/etc/openlan \
+    --name $name $IMAGE /usr/bin/openlan-switch -conf:dir /etc/openlan/switch
+
+  wait "docker logs -f $name" Http.Start 30
+
+  # Add a network.
+  docker exec $name openlan network add --name example --address 172.11.0.1/24
+  # Add users
+  docker exec $name openlan user add --name t1@example --password 123456
+}
+
+setup_sw2() {
+  local name=sw2
+  local address=172.255.0.3
+
+  mkdir -p /opt/openlan/$name
+  mkdir -p /opt/openlan/$name/etc/openlan/switch
+  cat > /opt/openlan/$name/etc/openlan/switch/switch.yaml <<EOF
+protocol: tcp
+crypt:
+  algorithm: aes-128
+  secret: ea64d5b0c96c
+EOF
+
+  # Start switch:
+  docker run -d --rm --privileged --network $network_name --ip $address \
+    --volume /opt/openlan/$name/etc/openlan:/etc/openlan \
+    --name $name $IMAGE /usr/bin/openlan-switch -conf:dir /etc/openlan/switch
+
+  wait "docker logs -f $name" Http.Start 30
+
+  # Add a network.
+  docker exec $name openlan network add --name example --address 172.11.0.2/24
+  # Add a output
+  docker exec $name openlan network --name example output add --remote 172.255.0.2 --protocol tcp --secret t1:123456 --crypt aes-128:ea64d5b0c96c
+  docker exec $name openlan network --name example output ls
+}
+
+
+ping() {
+  wait "docker exec sw2 ping -c 15 172.11.0.1" "bytes from" 15
+}
+
+setup() {
+  setup_net
+  setup_sw1
+  setup_sw2
+  ping
+}
+
+cleanup() {
+  # Stop containd
+  docker stop sw1
+  docker stop sw2
+  # Cleanup files
+  rm -rvf /opt/openlan/sw1
+  rm -rvf /opt/openlan/sw2
+}
+
+main
\ No newline at end of file
diff --git a/tests/switch.ut b/tests/switch.ut
deleted file mode 100644
index 19f42a3..0000000
--- a/tests/switch.ut
+++ /dev/null
@@ -1,3 +0,0 @@
-# OpenLAN Switch UT
-
-source $PWD/macro.ut