diff --git a/.drone.yml b/.drone.yml
new file mode 100644
index 0000000..d17c7ed
--- /dev/null
+++ b/.drone.yml
@@ -0,0 +1,78 @@
+workspace:
+  base: /srv/app
+  path: src/github.com/appleboy/drone-ssh
+
+pipeline:
+  clone:
+    image: plugins/git
+    tags: true
+
+  # restore the cache from an sftp server
+  restore_cache:
+    image: appleboy/drone-sftp-cache
+    restore: true
+    mount: [ .glide, vendor ]
+    ignore_branch: true
+
+  test:
+    image: appleboy/golang-testing
+    pull: true
+    environment:
+      TAGS: netgo
+      GOPATH: /srv/app
+    commands:
+      - make dep_install
+      - make vet
+      - make lint
+      - make test
+      - make coverage
+      - make build
+      # build binary for docker image
+      - make static_build
+    when:
+      event: [ push, tag, pull_request ]
+
+  release:
+    image: appleboy/golang-testing
+    pull: true
+    environment:
+      TAGS: netgo
+      GOPATH: /srv/app
+    commands:
+      - make release
+    when:
+      event: [ tag ]
+      branch: [ refs/tags/* ]
+
+  publish_tag:
+    image: plugins/docker
+    repo: ${DRONE_REPO}
+    tags: [ '${DRONE_TAG}' ]
+    when:
+      event: [ tag ]
+      branch: [ refs/tags/* ]
+
+  publish_latest:
+    image: plugins/docker
+    repo: ${DRONE_REPO}
+    tags: [ 'latest' ]
+    when:
+      event: [ push ]
+      branch: [ master ]
+
+  release:
+    image: plugins/github-release
+    files:
+      - dist/release/*
+    when:
+      event: [ tag ]
+      branch: [ refs/tags/* ]
+
+  # rebuild the cache on the sftp server
+  rebuild_cache:
+    image: appleboy/drone-sftp-cache
+    rebuild: true
+    mount: [ .glide, vendor ]
+    ignore_branch: true
+    when:
+      branch: master
diff --git a/.drone.yml.sig b/.drone.yml.sig
new file mode 100644
index 0000000..5fad5be
--- /dev/null
+++ b/.drone.yml.sig
@@ -0,0 +1 @@
+eyJhbGciOiJIUzI1NiJ9.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.MvA91xJBP4JoAxLObpbaumlNtzjO_Gc3znDbTRUjAGY
\ No newline at end of file
diff --git a/glide.lock b/glide.lock
index d7002eb..2500395 100644
--- a/glide.lock
+++ b/glide.lock
@@ -1,10 +1,14 @@
-hash: fa5c3a4bf7b53b8e4cbbb43fb8a33447fc7d67f8cdd7bb8a27ff66e2d0dac47a
-updated: 2017-01-23T09:33:16.187136258+08:00
+hash: 0c9184ed3a3b510feedfeb4fa4a119bdfa1a88b5dcfe9977944817a512958d44
+updated: 2017-01-23T10:04:51.354467848+08:00
 imports:
 - name: github.com/joho/godotenv
   version: a01a834e1654b4c9ca5b3ad05159445cc9c7ad08
   subpackages:
   - autoload
+- name: github.com/stretchr/testify
+  version: 69483b4bd14f5845b5a1e55bca19e954e827f1d0
+  subpackages:
+  - assert
 - name: github.com/urfave/cli
   version: 0bdeddeeb0f650497d603c4ad7b20cfe685682f6
 - name: golang.org/x/crypto
@@ -14,4 +18,12 @@ imports:
   - ed25519
   - ed25519/internal/edwards25519
   - ssh
-testImports: []
+testImports:
+- name: github.com/davecgh/go-spew
+  version: 6d212800a42e8ab5c146b8ace3490ee17e5225f9
+  subpackages:
+  - spew
+- name: github.com/pmezard/go-difflib
+  version: d8ed2627bdf02c080bf22230dbb337003b7aba2d
+  subpackages:
+  - difflib
diff --git a/glide.yaml b/glide.yaml
index e18eaea..fcb2b93 100644
--- a/glide.yaml
+++ b/glide.yaml
@@ -9,3 +9,7 @@ import:
 - package: golang.org/x/crypto
   subpackages:
   - ssh
+- package: github.com/stretchr/testify
+  version: ^1.1.4
+  subpackages:
+  - assert
diff --git a/plugin.go b/plugin.go
index bdd9dca..e4dca05 100644
--- a/plugin.go
+++ b/plugin.go
@@ -1,17 +1,19 @@
 package main
 
 import (
-	"fmt"
+	"log"
 	"net"
 	"os"
 	"strconv"
 	"strings"
 	"time"
 
+	"fmt"
 	"golang.org/x/crypto/ssh"
 )
 
 type (
+	// Config for the plugin.
 	Config struct {
 		Key      string
 		User     string
@@ -23,14 +25,16 @@ type (
 		Script   []string
 	}
 
+	// Plugin structure
 	Plugin struct {
 		Config Config
 	}
 )
 
+// Exec executes the plugin.
 func (p Plugin) Exec() error {
 	if p.Config.Key == "" && p.Config.Password == "" {
-		return fmt.Errorf("Error: Can't connect without a private SSH key or password.")
+		return fmt.Errorf("Error: can't connect without a private SSH key or password")
 	}
 
 	for i, host := range p.Config.Host {
@@ -63,7 +67,7 @@ func (p Plugin) Exec() error {
 			Auth:    auths,
 		}
 
-		fmt.Printf("+ ssh %s@%s -p %d\n", p.Config.User, addr, p.Config.Port)
+		log.Printf("+ ssh %s@%s -p %d\n", p.Config.User, addr, p.Config.Port)
 		client, err := ssh.Dial("tcp", addr, config)
 
 		if err != nil {
@@ -86,7 +90,7 @@ func (p Plugin) Exec() error {
 		}
 
 		if p.Config.Sleep != 0 && i != len(p.Config.Host)-1 {
-			fmt.Printf("+ sleep %d\n", p.Config.Sleep)
+			log.Printf("+ sleep %d\n", p.Config.Sleep)
 			time.Sleep(time.Duration(p.Config.Sleep) * time.Second)
 		}
 	}