diff --git a/.npmignore b/.npmignore
index 64a0ef899..db893ff65 100644
--- a/.npmignore
+++ b/.npmignore
@@ -4,5 +4,8 @@
 .flowconfig
 .travis.yml
 src/
+tests/
+**/*.spec.js
+**/*.spec.js.flow
 !dist/
 release.sh
</div><div class="naked_ctrl">
<form action="/index.cgi/contrast" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="https://patch-diff.githubusercontent.com/raw/algolia/react-element-to-jsx-string/pull/437.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://patch-diff.githubusercontent.com/raw/algolia/react-element-to-jsx-string/pull/437.diff" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast" selected="selected">配色反転</option>
<option value="larger-text">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>