diff --git a/README.md b/README.md
index dc27993fef..bde4427a13 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,7 @@ and more! You can touch with your own eyes at https://misskey.xyz/.
 6. `npm run build`
 
 ## Test
+ビルドしてから:
 `npm test`
 
 ## Setup
diff --git a/package.json b/package.json
index 9628a89226..f51c583635 100644
--- a/package.json
+++ b/package.json
@@ -24,6 +24,7 @@
     "@types/bcrypt": "1.0.0",
     "@types/body-parser": "0.0.33",
     "@types/browserify": "12.0.30",
+    "@types/chai": "3.4.34",
     "@types/chalk": "0.4.31",
     "@types/compression": "0.0.33",
     "@types/cors": "2.8.0",
@@ -43,6 +44,7 @@
     "@types/is-root": "1.0.0",
     "@types/is-url": "1.2.28",
     "@types/js-yaml": "3.5.29",
+    "@types/mocha": "2.2.37",
     "@types/mongodb": "2.1.36",
     "@types/ms": "0.7.29",
     "@types/multer": "0.0.32",
@@ -66,6 +68,7 @@
     "body-parser": "1.15.2",
     "browserify": "13.3.0",
     "browserify-livescript": "0.2.3",
+    "chai": "3.5.0",
     "chalk": "1.1.3",
     "chart.js": "2.4.0",
     "compression": "1.6.2",
diff --git a/src/server.ts b/src/server.ts
index b8646efd16..bff4b86bce 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -54,3 +54,8 @@ server.listen(config.port, () => {
 	// Send a 'ready' message to parent process
 	process.send('ready');
 });
+
+/**
+ * Export app for testing
+ */
+module.exports = app;