diff --git a/lib/helper/WebDriver.js b/lib/helper/WebDriver.js
index 69793ab1c..84b3b50be 100644
--- a/lib/helper/WebDriver.js
+++ b/lib/helper/WebDriver.js
@@ -491,7 +491,7 @@ class WebDriver extends Helper {
 }
 config.capabilities.browserName = config.browser || config.capabilities.browserName
 
- // WebDriver Bidi Protocol. Default: false
+ // WebDriver Bidi Protocol. Default: true
 config.capabilities.webSocketUrl = config.bidiProtocol ?? config.capabilities.webSocketUrl ?? true
 
 config.capabilities.browserVersion = config.browserVersion || config.capabilities.browserVersion
@@ -629,8 +629,11 @@ class WebDriver extends Helper {
 
 this.browser.on('dialog', () => {})
 
- await this.browser.sessionSubscribe({ events: ['log.entryAdded'] })
- this.browser.on('log.entryAdded', logEvents)
+ // Check for Bidi, because "sessionSubscribe" is an exclusive Bidi protocol feature. Otherwise, error will be thrown.
+ if (this.browser.capabilities && this.browser.capabilities.webSocketUrl) {
+ await this.browser.sessionSubscribe({ events: ['log.entryAdded'] })
+ this.browser.on('log.entryAdded', logEvents)
+ }
 
 return this.browser
 }
</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/codeceptjs/CodeceptJS/pull/5095.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/codeceptjs/CodeceptJS/pull/5095.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>