diff --git a/test.env b/test.env
new file mode 100644
index 0000000..df550ce
--- /dev/null
+++ b/test.env
@@ -0,0 +1,21 @@
+DATABASE_URL postgres://user:pass@localhost:5432/dbname
+API_KEY = someapikey
+SECRET_KEY = this is a bad secret
+123TOKEN=abcdefg
+API-KEY=invalidformat
+PASSWORD="my"pass"word"
+REDIS_URL=redis://localhost:6379 # trailing comment
+BROKEN_VAR=
+DUPLICATE_KEY=value1
+DUPLICATE_KEY=value2
+UNICODE_TEST=✓🚫💥
+MULTILINE_VAR=This is a
+bad idea
+HOST_URL=${UNDEFINED_HOST}/path
+FEATURE_ENABLED=yes
+DEBUG_MODE=on
+ SPACED_VAR=value
+MISSING_EQUALS_SIGN somevalue
+BAD_QUOTES='unfinished
+INVALID_UTF8=\x80\x81\x82
+
</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/coderabbitai/coderabbit-pr-review/pull/48.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/coderabbitai/coderabbit-pr-review/pull/48.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>