diff --git a/.gitignore b/.gitignore
index ca75d9a..cfef8af 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,6 +10,10 @@
 *.sdf
 *.status
 *.tar.*
+*.gcov
+*.gcda
+*.gcno
+*.html
 *~
 .DS_Store
 .deps
diff --git a/.jenkins.sh b/.jenkins.sh
new file mode 100755
index 0000000..dc87b3c
--- /dev/null
+++ b/.jenkins.sh
@@ -0,0 +1,37 @@
+#!/bin/bash
+
+result=0
+
+function run_test {
+    printf '\e[0;36m'
+    echo "running test: $command $@"
+    printf '\e[0m'
+
+    $command "$@"
+    status=$?
+    if [ $status -ne 0 ]; then
+        printf '\e[0;31m'
+        echo "test failed: $command $@"
+        printf '\e[0m'
+        echo
+        result=1
+    else
+        printf '\e[0;32m'
+        echo OK
+        printf '\e[0m'
+        echo
+    fi
+    return 0
+}
+
+run_test ./autogen.sh
+run_test ./configure --enable-debug
+run_test make
+run_test tests/test.py tests/google.com
+run_test tests/test.py tests/facebook.com
+run_test tests/test.py tests/twitter.com
+
+gcov src/*.c
+cd src && gcovr -r . --html  --html-details  -o index.html
+
+exit $result
diff --git a/.travis.yml b/.travis.yml
index 0bce413..858389a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,8 +9,9 @@ compiler:
   - gcc
 
 before_script:
+  - pip install gcovr
   - ./autogen.sh
   - ./configure
 
 script:
-  - make
+  - ./.jenkins.sh
diff --git a/configure.ac b/configure.ac
index c086e65..64bb271 100644
--- a/configure.ac
+++ b/configure.ac
@@ -33,7 +33,7 @@ AC_CHECK_FUNCS([inet_ntoa memset select socket strchr strdup strrchr])
 
 AC_ARG_ENABLE([debug],
     [  --enable-debug          build with additional debugging code],
-    [CFLAGS='-g -DDEBUG'])
+    [CFLAGS='-g -DDEBUG -fprofile-arcs -ftest-coverage -O0'])
 
 AM_CONDITIONAL(DEBUG, test x"$debug" = x"true")
 
diff --git a/src/chinadns.c b/src/chinadns.c
index 765b7a2..34ddade 100644
--- a/src/chinadns.c
+++ b/src/chinadns.c
@@ -157,6 +157,12 @@ static const char *help_message =
 
 #ifdef DEBUG
 #define DLOG(s...) LOG(s)
+void __gcov_flush(void);
+static void gcov_handler(int signum)
+{
+  __gcov_flush();
+  exit(1);
+}
 #else
 #define DLOG(s...)
 #endif
@@ -165,6 +171,10 @@ int main(int argc, char **argv) {
   fd_set readset, errorset;
   int max_fd;
 
+#ifdef DEBUG
+  signal(SIGTERM, gcov_handler);
+#endif
+
   memset(&id_addr_queue, 0, sizeof(id_addr_queue));
   memset(&delay_queue, 0, sizeof(delay_queue));
   if (0 != parse_args(argc, argv))
diff --git a/tests/facebook.com b/tests/facebook.com
new file mode 100644
index 0000000..d608bbc
--- /dev/null
+++ b/tests/facebook.com
@@ -0,0 +1 @@
+dig @127.0.0.1 a facebook.com
diff --git a/tests/google.com b/tests/google.com
new file mode 100644
index 0000000..1008740
--- /dev/null
+++ b/tests/google.com
@@ -0,0 +1 @@
+dig @127.0.0.1 a google.com
diff --git a/tests/iplist.py b/tests/iplist.py
new file mode 100644
index 0000000..9c60ec0
--- /dev/null
+++ b/tests/iplist.py
@@ -0,0 +1,15 @@
+#!/usr/bin/python
+
+from subprocess import Popen, PIPE
+
+if __name__ == '__main__':
+    result = set()
+    for i in range(400, 1400):
+        p = Popen((('dig +short @114.114.114.114 a '
+                    'r%d-1.googlevideo.com') % i).split(),
+                  stdin=PIPE, stdout=PIPE, stderr=PIPE, close_fds=True)
+        output = p.stdout.read()
+        if output:
+            result.add(output.strip())
+    for r in result:
+        print r
diff --git a/tests/test.py b/tests/test.py
new file mode 100755
index 0000000..bafa7ed
--- /dev/null
+++ b/tests/test.py
@@ -0,0 +1,34 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+import sys
+import os
+import signal
+import time
+from subprocess import Popen
+
+chinadns = ['src/chinadns', '-l', 'iplist.txt', '-c', 'chnroute.txt',
+            '-p', '15353', '-v']
+
+p1 = Popen(chinadns, shell=False, bufsize=0, close_fds=True)
+
+with open(sys.argv[-1]) as f:
+    dig_cmd = f.read()
+
+time.sleep(1)
+
+p2 = Popen(dig_cmd.split() + ['-p', '15353'], shell=False,
+           bufsize=0, close_fds=True)
+
+if p2 is not None:
+    r = p2.wait()
+if r == 0:
+    print 'test passed'
+
+for p in [p1]:
+    try:
+        os.kill(p.pid, signal.SIGTERM)
+    except OSError:
+        pass
+
+sys.exit(r)
diff --git a/tests/twitter.com b/tests/twitter.com
new file mode 100644
index 0000000..fd70fcc
--- /dev/null
+++ b/tests/twitter.com
@@ -0,0 +1 @@
+dig @127.0.0.1 a twitter.com
diff --git a/tests/www.facebook.com b/tests/www.facebook.com
new file mode 100644
index 0000000..1b58113
--- /dev/null
+++ b/tests/www.facebook.com
@@ -0,0 +1 @@
+dig @127.0.0.1 a www.facebook.com