diff --git a/build/build.sh b/build/build.sh
index 2ef43e4..ed6612a 100755
--- a/build/build.sh
+++ b/build/build.sh
@@ -2,101 +2,7 @@
 
 set -e
 
-function cleanup() {
-		echo 'Cleanup'
-		rm -rf ./surok
-		rm -rf ./out
-		rm -f ./Dockerfile*
-}
-
-function copy_surok() {
-	mkdir -p ./surok
-	for f in ../*; do
-			if [[ $f != '../.git' ]] && [[ $f != '../build' ]]; then
-					cp -r $f ./surok;
-			fi
-	done
-
-	SUROK_DEPS=$(grep '^Depends:' surok/debian/control | awk -F': ' '{print $2}' | sed 's/,//g')
-	CUR_DIR=$(pwd)
-}
-
-function build_builder() {
-	copy_surok
-	cat > Dockerfile.builder <<EOF
-FROM ubuntu:xenial
-
-# Build debian package
-
-MAINTAINER Denis Zheleztsov <difrex.punk@gmail.com>
-
-# Install build depends
-RUN apt-get update
-RUN apt-get -y install devscripts debhelper
-RUN apt-get clean
-
-COPY surok /opt/surok_build
-
-ENTRYPOINT cd /opt/surok_build && dpkg-buildpackage -uc -us && \
-mv /opt/surok_*.deb /opt/out
-EOF
-}
-
-function build_package() {
-		# run build
-		echo 'Build builder'
-		docker build -t surok_builder:latest -f Dockerfile.builder .
-		docker run -ti -v $CUR_DIR/out:/opt/out surok_builder:latest
-}
-
-function build_surok_base() {
-		if [[ $1 == 'rebuild' ]]; then
-				build_builder
-				build_package
-		fi
-
-		DEB=$(cd out && ls | grep .deb)
-
-		cat > Dockerfile.surok <<EOF
-FROM ubuntu:xenial
-
-MAINTAINER Denis Zheleztsov <difrex.punk@gmail.com>
-
-ADD out/${DEB} /tmp
-RUN apt-get update && apt-get install -y ${SUROK_DEPS} python3-memcache
-RUN dpkg -i /tmp/${DEB}
-RUN apt-get clean
-RUN rm -rf /tmp/*
-
-ENTRYPOINT cd /opt/surok && python3 surok.py -c /etc/surok/conf/surok.json
-EOF
-		docker build -t surok_base:latest -f Dockerfile.surok .
-}
-
-function build_alpine() {
-	copy_surok
-	cat > Dockerfile.alpine << EOF
-FROM alpine:latest
-
-MAINTAINER Denis Zheleztsov <difrex.punk@gmail.com>
-
-# Install Python
-RUN apk update && apk add python3
-
-# Upgrade pip
-RUN pip3 install --upgrade pip
-
-RUN pip3 install dnspython
-RUN pip3 install jinja2
-RUN pip3 install requests
-RUN pip3 install python-memcached
-
-COPY surok /opt/surok
-
-ENTRYPOINT cd /opt/surok && python3 surok.py -c /etc/surok/conf/surok.json
-EOF
-docker build -t surok_alpine -f Dockerfile.alpine .
-}
+. functions.sh
 
 function usage() {
 		echo "$0 <clean|build_package|surok_image|alpine>"
diff --git a/build/functions.sh b/build/functions.sh
new file mode 100644
index 0000000..406702c
--- /dev/null
+++ b/build/functions.sh
@@ -0,0 +1,95 @@
+function cleanup() {
+		echo 'Cleanup'
+		rm -rf ./surok
+		rm -rf ./out
+		rm -f ./Dockerfile*
+}
+
+function copy_surok() {
+		mkdir -p ./surok
+		for f in ../*; do
+				if [[ $f != '../.git' ]] && [[ $f != '../build' ]]; then
+						cp -r $f ./surok;
+				fi
+		done
+
+		SUROK_DEPS=$(grep '^Depends:' surok/debian/control | awk -F': ' '{print $2}' | sed 's/,//g')
+		CUR_DIR=$(pwd)
+}
+
+function build_builder() {
+		copy_surok
+		cat > Dockerfile.builder <<EOF
+FROM ubuntu:xenial
+
+# Build debian package
+
+MAINTAINER Denis Zheleztsov <difrex.punk@gmail.com>
+
+# Install build depends
+RUN apt-get update
+RUN apt-get -y install devscripts debhelper
+RUN apt-get clean
+
+COPY surok /opt/surok_build
+
+ENTRYPOINT cd /opt/surok_build && dpkg-buildpackage -uc -us && \
+mv /opt/surok_*.deb /opt/out
+EOF
+}
+
+function build_package() {
+		# run build
+		echo 'Build builder'
+		docker build -t surok_builder:latest -f Dockerfile.builder .
+		docker run -ti -v $CUR_DIR/out:/opt/out surok_builder:latest
+}
+
+function build_surok_base() {
+		if [[ $1 == 'rebuild' ]]; then
+				build_builder
+				build_package
+		fi
+
+		DEB=$(cd out && ls | grep .deb)
+
+		cat > Dockerfile.surok <<EOF
+FROM ubuntu:xenial
+
+MAINTAINER Denis Zheleztsov <difrex.punk@gmail.com>
+
+ADD out/${DEB} /tmp
+RUN apt-get update && apt-get install -y ${SUROK_DEPS} python3-memcache
+RUN dpkg -i /tmp/${DEB}
+RUN apt-get clean
+RUN rm -rf /tmp/*
+
+ENTRYPOINT cd /opt/surok && python3 surok.py -c /etc/surok/conf/surok.json
+EOF
+		docker build -t surok_base:latest -f Dockerfile.surok .
+}
+
+function build_alpine() {
+		copy_surok
+		cat > Dockerfile.alpine << EOF
+FROM alpine:latest
+
+MAINTAINER Denis Zheleztsov <difrex.punk@gmail.com>
+
+# Install Python
+RUN apk update && apk add python3
+
+# Upgrade pip
+RUN pip3 install --upgrade pip
+
+RUN pip3 install dnspython
+RUN pip3 install jinja2
+RUN pip3 install requests
+RUN pip3 install python-memcached
+
+COPY surok /opt/surok
+
+ENTRYPOINT cd /opt/surok && python3 surok.py -c /etc/surok/conf/surok.json
+EOF
+		docker build -t surok_alpine -f Dockerfile.alpine .
+}
diff --git a/build/runtests.sh b/build/runtests.sh
new file mode 100755
index 0000000..37cbbe7
--- /dev/null
+++ b/build/runtests.sh
@@ -0,0 +1,14 @@
+#!/bin/bash
+
+set -e
+
+. functions.sh
+
+function run_tests() {
+		docker run -ti -v $(pwd)/tests.py:/opt/surok/tests.py \
+					 -v $(pwd)/tests_entrypoint.sh:/tests_entrypoint.sh \
+					 --entrypoint /tests_entrypoint.sh \
+					 surok_base:latest
+}
+
+run_tests
diff --git a/build/tests.py b/build/tests.py
new file mode 100644
index 0000000..a194afc
--- /dev/null
+++ b/build/tests.py
@@ -0,0 +1,23 @@
+import unittest
+import json
+import os
+
+
+class TestLoadConfig(unittest.TestCase):
+
+
+    def test_main_conf(self):
+        # Load base configurations
+        surok_conf = '/etc/surok/conf/surok.json'
+        # Read config file
+        f = open(surok_conf, 'r')
+        conf = json.loads(f.read())
+        f.close()
+
+        self.assertIn('confd', conf)
+        self.assertTrue(os.path.isdir(conf['confd']))
+        self.assertIn('domain', conf)
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/build/tests_entrypoint.sh b/build/tests_entrypoint.sh
new file mode 100755
index 0000000..94a054c
--- /dev/null
+++ b/build/tests_entrypoint.sh
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+cd /opt/surok && python3 tests.py