diff --git a/src/api/private/signup.ts b/src/api/private/signup.ts
index 592dfcceb1..34e98db284 100644
--- a/src/api/private/signup.ts
+++ b/src/api/private/signup.ts
@@ -5,6 +5,7 @@ import recaptcha = require('recaptcha-promise');
 import User from '../models/user';
 import { validateUsername } from '../models/user';
 import serialize from '../serializers/user';
+import config from '../../conf';
 
 recaptcha.init({
 	secret_key: config.recaptcha.secretKey
@@ -12,11 +13,14 @@ recaptcha.init({
 
 export default async (req: express.Request, res: express.Response) => {
 	// Verify recaptcha
-	const success = await recaptcha(req.body['g-recaptcha-response']);
+	// ただしテスト時はこの機構は障害となるため無効にする
+	if (process.env.NODE_ENV !== 'test') {
+		const success = await recaptcha(req.body['g-recaptcha-response']);
 
-	if (!success) {
-		res.status(400).send('recaptcha-failed');
-		return;
+		if (!success) {
+			res.status(400).send('recaptcha-failed');
+			return;
+		}
 	}
 
 	const username = req.body['username'];
diff --git a/test/api.js b/test/api.js
new file mode 100644
index 0000000000..ac33dd9ce6
--- /dev/null
+++ b/test/api.js
@@ -0,0 +1,13 @@
+/**
+ * API TESTS
+ */
+
+// During the test the env variable is set to test
+process.env.NODE_ENV = 'test';
+
+const chai = require('chai');
+const chaiHttp = require('chai-http');
+const server = require('../built/server');
+const should = chai.should();
+
+chai.use(chaiHttp);