diff --git a/api/package.json b/api/package.json
index 173636e..3b17c3b 100644
--- a/api/package.json
+++ b/api/package.json
@@ -1,6 +1,9 @@
 {
   "name": "@namae/api",
   "version": "0.1.0",
+  "scripts": {
+    "test": "jest"
+  },
   "dependencies": {
     "isomorphic-unfetch": "^3.0.0",
     "npm-name": "^5.5.0",
diff --git a/package.json b/package.json
index f08f686..3c997ec 100644
--- a/package.json
+++ b/package.json
@@ -3,10 +3,13 @@
   "description": "namae saves your time searching around registries and checking if the desired name is ready for use.",
   "author": "Yasuaki Uechi <y@uechi.io> (https://uechi.io/)",
   "scripts": {
-    "start": "now dev"
+    "start": "now dev",
+    "test": "yarn workspaces run test"
   },
-  "dependencies": {
-    "@types/node": "^12.6.8"
+  "dependencies": {},
+  "devDependencies": {
+    "@types/node": "^12.6.9",
+    "typescript": "^3.5.3"
   },
   "license": "MIT",
   "private": true,
diff --git a/web/package.json b/web/package.json
index b48343f..983ee7e 100644
--- a/web/package.json
+++ b/web/package.json
@@ -5,6 +5,7 @@
     "build": "react-scripts build",
     "eject": "react-scripts eject",
     "now-build": "yarn build",
+    "now-dev": "BROWSER=false react-scripts start",
     "start": "react-scripts start",
     "test": "react-scripts test"
   },
@@ -20,6 +21,10 @@
     "react-tippy": "^1.2.3",
     "styled-components": "^4.3.2"
   },
+  "devDependencies": {
+    "@testing-library/jest-dom": "^4.0.0",
+    "@testing-library/react": "^8.0.7"
+  },
   "browserslist": {
     "production": [
       ">0.2%",
diff --git a/web/src/App.test.js b/web/src/App.test.js
index 4bf1935..93b1ab6 100644
--- a/web/src/App.test.js
+++ b/web/src/App.test.js
@@ -1,9 +1,8 @@
 import React from 'react'
-import ReactDOM from 'react-dom'
+import { render } from '@testing-library/react'
 import App from './App'
 
-it('renders without crashing', () => {
-  const div = document.createElement('div')
-  ReactDOM.render(<App />, div)
-  ReactDOM.unmountComponentAtNode(div)
+it('renders welcome message', () => {
+  const { getByText } = render(<App />)
+  expect(getByText('name new project')).toBeInTheDocument()
 })
diff --git a/web/src/setupTests.js b/web/src/setupTests.js
new file mode 100644
index 0000000..4cf03f6
--- /dev/null
+++ b/web/src/setupTests.js
@@ -0,0 +1,5 @@
+// react-testing-library renders your components to document.body,
+// this will ensure they're removed after each test.
+import '@testing-library/react/cleanup-after-each'
+// this adds jest-dom's custom assertions
+import '@testing-library/jest-dom/extend-expect'
diff --git a/yarn.lock b/yarn.lock
index 25a6613..95ce279 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -881,7 +881,7 @@
   dependencies:
     regenerator-runtime "^0.13.2"
 
-"@babel/runtime@^7.0.0", "@babel/runtime@^7.3.4", "@babel/runtime@^7.4.2", "@babel/runtime@^7.4.3":
+"@babel/runtime@^7.0.0", "@babel/runtime@^7.3.4", "@babel/runtime@^7.4.2", "@babel/runtime@^7.4.3", "@babel/runtime@^7.5.1", "@babel/runtime@^7.5.4", "@babel/runtime@^7.5.5":
   version "7.5.5"
   resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.5.5.tgz#74fba56d35efbeca444091c7850ccd494fd2f132"
   integrity sha512-28QvEGyQyNkB0/m2B4FU7IEZGK2NUrcMtT6BZEFALTguLk+AUT6ofsHtPk5QyjAdUkpMJ+/Em+quwz4HOt30AQ==
@@ -1219,6 +1219,11 @@
   resolved "https://registry.yarnpkg.com/@nodelib/fs.stat/-/fs.stat-1.1.3.tgz#2b5a3ab3f918cca48a8c754c08168e3f03eba61b"
   integrity sha512-shAmDyaQC4H92APFoIaVDHCx5bStIocgvbwQyxPRrbUY20V1EYTbSDchWbuwlMG3V17cprZhA6+78JfB+3DTPw==
 
+"@sheerun/mutationobserver-shim@^0.3.2":
+  version "0.3.2"
+  resolved "https://registry.yarnpkg.com/@sheerun/mutationobserver-shim/-/mutationobserver-shim-0.3.2.tgz#8013f2af54a2b7d735f71560ff360d3a8176a87b"
+  integrity sha512-vTCdPp/T/Q3oSqwHmZ5Kpa9oI7iLtGl3RQaA/NyLHikvcrPxACkkKVr/XzkSPJWXHRhKGzVvb0urJsbMlRxi1Q==
+
 "@sindresorhus/is@^0.14.0":
   version "0.14.0"
   resolved "https://registry.yarnpkg.com/@sindresorhus/is/-/is-0.14.0.tgz#9fb3a3cf3132328151f353de4632e01e52102bea"
@@ -1334,6 +1339,40 @@
   dependencies:
     defer-to-connect "^1.0.1"
 
+"@testing-library/dom@^5.5.4":
+  version "5.6.1"
+  resolved "https://registry.yarnpkg.com/@testing-library/dom/-/dom-5.6.1.tgz#705a1cb4a039b877c1e69e916824038e837ab637"
+  integrity sha512-Y1T2bjtvQMewffn1CJ28kpgnuvPYKsBcZMagEH0ppfEMZPDc8AkkEnTk4smrGZKw0cblNB3lhM2FMnpfLExlHg==
+  dependencies:
+    "@babel/runtime" "^7.5.5"
+    "@sheerun/mutationobserver-shim" "^0.3.2"
+    aria-query "3.0.0"
+    pretty-format "^24.8.0"
+    wait-for-expect "^1.2.0"
+
+"@testing-library/jest-dom@^4.0.0":
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/@testing-library/jest-dom/-/jest-dom-4.0.0.tgz#56eee8dd183fe14a682fda7aca6413ec4e5303d2"
+  integrity sha512-YQA/LnRRfqHV5YRauawOGgMDgq43XfyqCz3whmxIPyrfvTdjLCNyY/BseGaa48y54yb3oiRo/NZT0oXNMQdkTA==
+  dependencies:
+    "@babel/runtime" "^7.5.1"
+    chalk "^2.4.1"
+    css "^2.2.3"
+    css.escape "^1.5.1"
+    jest-diff "^24.0.0"
+    jest-matcher-utils "^24.0.0"
+    lodash "^4.17.11"
+    pretty-format "^24.0.0"
+    redent "^3.0.0"
+
+"@testing-library/react@^8.0.7":
+  version "8.0.7"
+  resolved "https://registry.yarnpkg.com/@testing-library/react/-/react-8.0.7.tgz#b5992c9156e926850a0e3a7c882ae1aed83b1c77"
+  integrity sha512-6XoeWSr3UCdxMswbkW0BmuXYw8a6w+stt+5gg4D4zAcljfhXETQ5o28bjJFwNab4OPg8gBNK8KIVot86L4Q8Vg==
+  dependencies:
+    "@babel/runtime" "^7.5.4"
+    "@testing-library/dom" "^5.5.4"
+
 "@types/babel__core@^7.1.0":
   version "7.1.2"
   resolved "https://registry.yarnpkg.com/@types/babel__core/-/babel__core-7.1.2.tgz#608c74f55928033fce18b99b213c16be4b3d114f"
@@ -1387,10 +1426,10 @@
     "@types/istanbul-lib-coverage" "*"
     "@types/istanbul-lib-report" "*"
 
-"@types/node@^12.6.8":
-  version "12.6.8"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-12.6.8.tgz#e469b4bf9d1c9832aee4907ba8a051494357c12c"
-  integrity sha512-aX+gFgA5GHcDi89KG5keey2zf0WfZk/HAQotEamsK2kbey+8yGKcson0hbK8E+v0NArlCJQCqMP161YhV6ZXLg==
+"@types/node@^12.6.9":
+  version "12.6.9"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-12.6.9.tgz#ffeee23afdc19ab16e979338e7b536fdebbbaeaf"
+  integrity sha512-+YB9FtyxXGyD54p8rXwWaN1EWEyar5L58GlGWgtH2I9rGmLGBQcw63+0jw+ujqVavNuO47S1ByAjm9zdHMnskw==
 
 "@types/q@^1.5.1":
   version "1.5.2"
@@ -1746,7 +1785,7 @@ argparse@^1.0.7:
   dependencies:
     sprintf-js "~1.0.2"
 
-aria-query@^3.0.0:
+aria-query@3.0.0, aria-query@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/aria-query/-/aria-query-3.0.0.tgz#65b3fcc1ca1155a8c9ae64d6eee297f15d5133cc"
   integrity sha1-ZbP8wcoRVajJrmTW7uKX8V1RM8w=
@@ -3123,6 +3162,21 @@ css-what@2.1, css-what@^2.1.2:
   resolved "https://registry.yarnpkg.com/css-what/-/css-what-2.1.3.tgz#a6d7604573365fe74686c3f311c56513d88285f2"
   integrity sha512-a+EPoD+uZiNfh+5fxw2nO9QwFa6nJe2Or35fGY6Ipw1R3R4AGz1d1TEZrCegvw2YTmZ0jXirGYlzxxpYSHwpEg==
 
+css.escape@^1.5.1:
+  version "1.5.1"
+  resolved "https://registry.yarnpkg.com/css.escape/-/css.escape-1.5.1.tgz#42e27d4fa04ae32f931a4b4d4191fa9cddee97cb"
+  integrity sha1-QuJ9T6BK4y+TGktNQZH6nN3ul8s=
+
+css@^2.2.3:
+  version "2.2.4"
+  resolved "https://registry.yarnpkg.com/css/-/css-2.2.4.tgz#c646755c73971f2bba6a601e2cf2fd71b1298929"
+  integrity sha512-oUnjmWpy0niI3x/mPL8dVEI1l7MnG3+HHyRPHf+YFSbK+svOhXpmSOcDURUh2aOCgl2grzrOPt1nHLuCVFULLw==
+  dependencies:
+    inherits "^2.0.3"
+    source-map "^0.6.1"
+    source-map-resolve "^0.5.2"
+    urix "^0.1.0"
+
 cssdb@^4.3.0:
   version "4.4.0"
   resolved "https://registry.yarnpkg.com/cssdb/-/cssdb-4.4.0.tgz#3bf2f2a68c10f5c6a08abd92378331ee803cddb0"
@@ -4993,6 +5047,11 @@ imurmurhash@^0.1.4:
   resolved "https://registry.yarnpkg.com/imurmurhash/-/imurmurhash-0.1.4.tgz#9218b9b2b928a238b13dc4fb6b6d576f231453ea"
   integrity sha1-khi5srkoojixPcT7a21XbyMUU+o=
 
+indent-string@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/indent-string/-/indent-string-4.0.0.tgz#624f8f4497d619b2d9768531d58f4122854d7251"
+  integrity sha512-EdDDZu4A2OyIK7Lr/2zG+w5jmbuk1DVBnEwREQvBzspBJkCEbRa8GxU1lghYcaGJCnRWibjDXlq779X1/y5xwg==
+
 indexes-of@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/indexes-of/-/indexes-of-1.0.1.tgz#f30f716c8e2bd346c7b67d3df3915566a7c05607"
@@ -5535,7 +5594,7 @@ jest-config@^24.8.0:
     pretty-format "^24.8.0"
     realpath-native "^1.1.0"
 
-jest-diff@^24.8.0:
+jest-diff@^24.0.0, jest-diff@^24.8.0:
   version "24.8.0"
   resolved "https://registry.yarnpkg.com/jest-diff/-/jest-diff-24.8.0.tgz#146435e7d1e3ffdf293d53ff97e193f1d1546172"
   integrity sha512-wxetCEl49zUpJ/bvUmIFjd/o52J+yWcoc5ZyPq4/W1LUKGEhRYDIbP1KcF6t+PvqNrGAFk4/JhtxDq/Nnzs66g==
@@ -5648,7 +5707,7 @@ jest-leak-detector@^24.8.0:
   dependencies:
     pretty-format "^24.8.0"
 
-jest-matcher-utils@^24.8.0:
+jest-matcher-utils@^24.0.0, jest-matcher-utils@^24.8.0:
   version "24.8.0"
   resolved "https://registry.yarnpkg.com/jest-matcher-utils/-/jest-matcher-utils-24.8.0.tgz#2bce42204c9af12bde46f83dc839efe8be832495"
   integrity sha512-lex1yASY51FvUuHgm0GOVj7DCYEouWSlIYmCW7APSqB9v8mXmKSn5+sWVF0MhuASG0bnYY106/49JU1FZNl5hw==
@@ -6493,6 +6552,11 @@ mimic-response@^1.0.0, mimic-response@^1.0.1:
   resolved "https://registry.yarnpkg.com/mimic-response/-/mimic-response-1.0.1.tgz#4923538878eef42063cb8a3e3b0798781487ab1b"
   integrity sha512-j5EctnkH7amfV/q5Hgmoal1g2QHFJRraOtmx0JpIqkxhBhI/lJSl1nMpQ45hVarwNETOoWEimndZ4QK0RHxuxQ==
 
+min-indent@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/min-indent/-/min-indent-1.0.0.tgz#cfc45c37e9ec0d8f0a0ec3dd4ef7f7c3abe39256"
+  integrity sha1-z8RcN+nsDY8KDsPdTvf3w6vjklY=
+
 mini-css-extract-plugin@0.5.0:
   version "0.5.0"
   resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-0.5.0.tgz#ac0059b02b9692515a637115b0cc9fed3a35c7b0"
@@ -8094,7 +8158,7 @@ pretty-error@^2.1.1:
     renderkid "^2.0.1"
     utila "~0.4"
 
-pretty-format@^24.8.0:
+pretty-format@^24.0.0, pretty-format@^24.8.0:
   version "24.8.0"
   resolved "https://registry.yarnpkg.com/pretty-format/-/pretty-format-24.8.0.tgz#8dae7044f58db7cb8be245383b565a963e3c27f2"
   integrity sha512-P952T7dkrDEplsR+TuY7q3VXDae5Sr7zmQb12JU/NDQa/3CH7/QW0yvqLcGN6jL+zQFKaoJcPc+yJxMTGmosqw==
@@ -8564,6 +8628,14 @@ recursive-readdir@2.2.2:
   dependencies:
     minimatch "3.0.4"
 
+redent@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/redent/-/redent-3.0.0.tgz#e557b7998316bb53c9f1f56fa626352c6963059f"
+  integrity sha512-6tDA8g98We0zd0GvVeMT9arEOnTw9qM03L9cJXaCjrip1OO764RDBLBfrB4cwzNGDj5OA5ioymC9GkizgWJDUg==
+  dependencies:
+    indent-string "^4.0.0"
+    strip-indent "^3.0.0"
+
 regenerate-unicode-properties@^8.0.2:
   version "8.1.0"
   resolved "https://registry.yarnpkg.com/regenerate-unicode-properties/-/regenerate-unicode-properties-8.1.0.tgz#ef51e0f0ea4ad424b77bf7cb41f3e015c70a3f0e"
@@ -9230,7 +9302,7 @@ source-list-map@^2.0.0:
   resolved "https://registry.yarnpkg.com/source-list-map/-/source-list-map-2.0.1.tgz#3993bd873bfc48479cca9ea3a547835c7c154b34"
   integrity sha512-qnQ7gVMxGNxsiL4lEuJwe/To8UnK7fAnmbGEEH8RpLouuKbeEm0lhbQVFIrNSuB+G7tVrAlVsZgETT5nljf+Iw==
 
-source-map-resolve@^0.5.0:
+source-map-resolve@^0.5.0, source-map-resolve@^0.5.2:
   version "0.5.2"
   resolved "https://registry.yarnpkg.com/source-map-resolve/-/source-map-resolve-0.5.2.tgz#72e2cc34095543e43b2c62b2c4c10d4a9054f259"
   integrity sha512-MjqsvNwyz1s0k81Goz/9vRBe9SZdB09Bdw+/zYyO+3CuPk6fouTaxscHkgtE8jKvf01kVfl8riHzERQ/kefaSA==
@@ -9503,6 +9575,13 @@ strip-eof@^1.0.0:
   resolved "https://registry.yarnpkg.com/strip-eof/-/strip-eof-1.0.0.tgz#bb43ff5598a6eb05d89b59fcd129c983313606bf"
   integrity sha1-u0P/VZim6wXYm1n80SnJgzE2Br8=
 
+strip-indent@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/strip-indent/-/strip-indent-3.0.0.tgz#c32e1cee940b6b3432c771bc2c54bcce73cd3001"
+  integrity sha512-laJTa3Jb+VQpaC6DseHhF7dXVqHTfJPCRDaEbid/drOhgitgYku/letMUqOXFoWV0zIIUbjpdH2t+tYj4bQMRQ==
+  dependencies:
+    min-indent "^1.0.0"
+
 strip-json-comments@^2.0.1, strip-json-comments@~2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/strip-json-comments/-/strip-json-comments-2.0.1.tgz#3c531942e908c2697c0ec344858c286c7ca0a60a"
@@ -9893,6 +9972,11 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
+typescript@^3.5.3:
+  version "3.5.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.5.3.tgz#c830f657f93f1ea846819e929092f5fe5983e977"
+  integrity sha512-ACzBtm/PhXBDId6a6sDJfroT2pOWt/oOnk4/dElG5G33ZL776N3Y6/6bKZJBFpd+b05F3Ct9qDjMeJmRWtE2/g==
+
 ua-parser-js@^0.7.18:
   version "0.7.20"
   resolved "https://registry.yarnpkg.com/ua-parser-js/-/ua-parser-js-0.7.20.tgz#7527178b82f6a62a0f243d1f94fd30e3e3c21098"
@@ -10175,6 +10259,11 @@ w3c-xmlserializer@^1.1.2:
     webidl-conversions "^4.0.2"
     xml-name-validator "^3.0.0"
 
+wait-for-expect@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/wait-for-expect/-/wait-for-expect-1.2.0.tgz#fdab6a26e87d2039101db88bff3d8158e5c3e13f"
+  integrity sha512-EJhKpA+5UHixduMBEGhTFuLuVgQBKWxkFbefOdj2bbk2/OpA5Opsc4aUTGmF+qJ+v3kTGxDRNYwKaT4j6g5n8Q==
+
 walker@^1.0.7, walker@~1.0.5:
   version "1.0.7"
   resolved "https://registry.yarnpkg.com/walker/-/walker-1.0.7.tgz#2f7f9b8fd10d677262b18a884e28d19618e028fb"