Per linter

tests/bootstrap-phpunit.php

@@ -23,12 +23,12 @@
 
 global $wp_tests_options; // WP testing library uses this to define option values.
 
-$wp_tests_options = [
-	'active_plugins' => [
+$wp_tests_options = array(
+	'active_plugins' => array(
 		'contact-form-7-extras/plugin.php',
 		'contact-form-7/wp-contact-form-7.php',
-	],
-];
+	),
+);
 
 // Include all helper functions.
 require_once $wp_tests_dir . '/includes/functions.php';

tests/phpunit/class-plugin-test.php

@@ -1,7 +1,14 @@
 <?php
 
+/**
+ * Test the main plugin class.
+ */
 class Plugin_Test extends WP_UnitTestCase {
-	public function test_plugin_active() {
+
+	/**
+	 * If the plugin class is available.
+	 */
+	public function test_plugin_available() {
 		$this->assertTrue( class_exists( 'Cf7_Extras' ), 'Plugin is active' );
 	}
 }