diff --git a/.travis.yml b/.travis.yml
index 2f9bd13..4a88b77 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,5 +15,6 @@ before_install:
   - pip install m2crypto salsa20 pep8 pyflakes nose coverage
   - sudo tests/socksify/install.sh
   - sudo tests/libsodium/install.sh
+  - sudo tests/setup_tc.sh
 script:
   - ./.jenkins.sh
diff --git a/tests/setup_tc.sh b/tests/setup_tc.sh
new file mode 100755
index 0000000..1a5fa20
--- /dev/null
+++ b/tests/setup_tc.sh
@@ -0,0 +1,18 @@
+#!/bin/bash
+
+DEV=lo
+PORT=8388
+DELAY=100ms
+
+type tc 2> /dev/null && (
+    tc qdisc add dev $DEV root handle 1: htb
+    tc class add dev $DEV parent 1: classid 1:1 htb rate 2mbps
+    tc class add dev $DEV parent 1:1 classid 1:6 htb rate 2mbps ceil 1mbps prio 0
+    tc filter add dev $DEV parent 1:0 prio 0 protocol ip handle 6 fw flowid 1:6
+
+    tc filter add dev $DEV parent 1:0 protocol ip u32 match ip dport $PORT 0xffff flowid 1:6
+    tc filter add dev $DEV parent 1:0 protocol ip u32 match ip sport $PORT 0xffff flowid 1:6
+
+    tc qdisc show dev lo
+)
+
diff --git a/tests/test_large_file.sh b/tests/test_large_file.sh
index 14d3002..e8acd79 100755
--- a/tests/test_large_file.sh
+++ b/tests/test_large_file.sh
@@ -1,29 +1,10 @@
 #!/bin/bash
 
-DEV=lo
-PORT=8388
-DELAY=100ms
-
 PYTHON="coverage run -p -a"
 URL=http://127.0.0.1/file
 
 mkdir -p tmp
 
-type tc 2> /dev/null && (
-    tc qdisc add dev $DEV root handle 1: htb
-    tc class add dev $DEV parent 1: classid 1:1 htb rate 2mbps
-    tc class add dev $DEV parent 1:1 classid 1:6 htb rate 2mbps ceil 1mbps prio 0
-    tc filter add dev $DEV parent 1:0 prio 0 protocol ip handle 6 fw flowid 1:6
-
-    tc filter add dev $DEV parent 1:0 protocol ip u32 match ip dport $PORT 0xffff flowid 1:6
-    tc filter add dev $DEV parent 1:0 protocol ip u32 match ip sport $PORT 0xffff flowid 1:6
-
-#    iptables -D OUTPUT -t mangle -p tcp --sport 8388 -j MARK --set-mark 6
-#    iptables -A OUTPUT -t mangle -p tcp --sport 8388 -j MARK --set-mark 6
-
-    tc qdisc show dev lo
-)
-
 $PYTHON shadowsocks/local.py -c tests/aes.json &
 LOCAL=$!
 
@@ -38,8 +19,6 @@ time curl -o tmp/result --socks5-hostname 127.0.0.1:1081 $URL
 kill -s SIGINT $LOCAL
 kill -s SIGINT $SERVER
 
-type tc 2> /dev/null && tc qdisc del dev lo root
-
 sleep 2
 
 diff tmp/expected tmp/result || exit 1