diff --git a/.circleci/config.yml b/.circleci/config.yml
index c747a18..473d34f 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -36,3 +36,4 @@ jobs: # a collection of steps
           command: |
             ./lint.sh
             ./phpunit.sh
+            bash <(curl -s https://codecov.io/bash)
diff --git a/.gitignore b/.gitignore
index d71d7e3..2f3eb81 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,6 +10,7 @@
 /.vagrant
 Homestead.json
 Homestead.yaml
+clover.xml
 npm-debug.log
 yarn-error.log
 .env
diff --git a/README.md b/README.md
index 4fa13f7..377e402 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,7 @@
 
 [![CircleCI](https://circleci.com/gh/wifidog/wifidog-auth-laravel.svg?style=svg)](https://circleci.com/gh/wifidog/wifidog-auth-laravel)
 [![Docker Cloud Build Status](https://img.shields.io/docker/cloud/build/wifidog/wifidog-auth-laravel.svg)](https://hub.docker.com/r/wifidog/wifidog-auth-laravel)
+[![codecov](https://codecov.io/gh/wifidog/wifidog-auth-laravel/branch/master/graph/badge.svg)](https://codecov.io/gh/wifidog/wifidog-auth-laravel)
 [![LICENSE](https://img.shields.io/badge/license-Anti%20996-blue.svg)](https://github.com/wifidog/wifidog-auth-laravel/blob/master/LICENSE)
 
 This project provides a auth server for wifidog. For API details, please see the [WiFiDog Protocol V1](http://dev.wifidog.org/wiki/doc/developer/WiFiDogProtocol_V1).
diff --git a/phpunit.xml b/phpunit.xml
index da4add3..a7812dd 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -22,6 +22,9 @@
             <directory suffix=".php">./app</directory>
         </whitelist>
     </filter>
+    <logging>
+        <log type="coverage-clover" target="clover.xml"/>
+    </logging>
     <php>
         <server name="APP_ENV" value="testing"/>
         <server name="BCRYPT_ROUNDS" value="4"/>