diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 0000000..d9ba6f8
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,21 @@
+version: 2
+jobs:
+  test:
+    working_directory: /go/src/github.com/yukimochi/Activity-Relay
+    docker:
+      - image: circleci/golang
+    steps:
+      - checkout
+      - run:
+          name: build
+          command: |
+            go get -u github.com/golang/dep/cmd/dep
+            dep ensure
+            go test -coverprofile=coverage.txt . ./worker ./cli
+            bash <(curl -s https://codecov.io/bash)
+    
+workflows:
+  version: 2
+  build:
+    jobs:
+      - test
diff --git a/handle_test.go b/handle_test.go
new file mode 100644
index 0000000..444f201
--- /dev/null
+++ b/handle_test.go
@@ -0,0 +1,32 @@
+package main
+
+import "testing"
+
+func TestContains(t *testing.T) {
+	data := "nil"
+	sData := []string{
+		"no",
+		"nil",
+	}
+	badData := 0
+	result := contains(data, "true")
+	if result != false {
+		t.Fatalf("Failed - no contain but true.")
+	}
+	result = contains(data, "nil")
+	if result != true {
+		t.Fatalf("Failed - contain but false.")
+	}
+	result = contains(sData, "true")
+	if result != false {
+		t.Fatalf("Failed - no contain but true. (slice)")
+	}
+	result = contains(sData, "nil")
+	if result != true {
+		t.Fatalf("Failed - contain but false. (slice)")
+	}
+	result = contains(badData, "hoge")
+	if result != false {
+		t.Fatalf("Failed - input bad data but true. (slice)")
+	}
+}
diff --git a/readme.md b/readme.md
index 26e4c80..941a6b7 100644
--- a/readme.md
+++ b/readme.md
@@ -2,6 +2,9 @@
 
 ## Yet another powerful customizable ActivityPub relay server written in Go.
 
+[![CircleCI](https://circleci.com/gh/yukimochi/Activity-Relay.svg?style=svg)](https://circleci.com/gh/yukimochi/Activity-Relay)
+[![codecov](https://codecov.io/gh/yukimochi/Activity-Relay/branch/master/graph/badge.svg)](https://codecov.io/gh/yukimochi/Activity-Relay)
+
 ![Powered by Ayame](docs/ayame.png)
 
 ## Packages