yii composer install

tests/codeception/_pages/AboutPage.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace tests\codeception\_pages;
+
+use yii\codeception\BasePage;
+
+/**
+ * Represents about page
+ * @property \AcceptanceTester|\FunctionalTester $actor
+ */
+class AboutPage extends BasePage
+{
+    public $route = 'site/about';
+}