diff --git a/.coveragerc b/.coveragerc
index a116ffae9458..be3db019d85c 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -2,6 +2,7 @@
 branch = True
 source = nova
 omit = nova/tests/*
+concurrency = eventlet
 
 [report]
 ignore_errors = True
</div><div class="naked_ctrl">
<form action="/index.cgi/larger-text" 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://opendev.org/openstack/nova/commit/832abd2b67520534baf8d6179063201b1c3f3fba.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://opendev.org/openstack/nova/commit/832abd2b67520534baf8d6179063201b1c3f3fba.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">配色反転</option>
<option value="larger-text" selected="selected">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>