diff --git a/composer.json b/composer.json
index c6de1d69..1147d983 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
     },
     "require-dev": {
         "wp-cli/db-command": "^1.3 || ^2",
-        "wp-cli/wp-cli-tests": "^3.1"
+        "wp-cli/wp-cli-tests": "^4"
     },
     "config": {
         "process-timeout": 7200,
diff --git a/config-command.php b/config-command.php
index fa1971fb..290f539e 100644
--- a/config-command.php
+++ b/config-command.php
@@ -4,7 +4,7 @@
 	return;
 }
 
-$wpcli_config_autoloader = dirname( __FILE__ ) . '/vendor/autoload.php';
+$wpcli_config_autoloader = __DIR__ . '/vendor/autoload.php';
 if ( file_exists( $wpcli_config_autoloader ) ) {
 	require_once $wpcli_config_autoloader;
 }
diff --git a/src/Config_Command.php b/src/Config_Command.php
index 0c166646..95a486ed 100644
--- a/src/Config_Command.php
+++ b/src/Config_Command.php
@@ -466,7 +466,6 @@ public function is_true( $args, $assoc_args ) {
 			WP_CLI::halt( 0 );
 		}
 		WP_CLI::halt( 1 );
-
 	}
 
 	/**
@@ -857,21 +856,20 @@ public function shuffle_salts( $args, $assoc_args ) {
 		}
 
 		WP_CLI::success( 'Shuffled the salt keys.' );
-
 	}
 
 	/**
 	 * Filters wp-config.php file configurations.
 	 *
-	 * @param array $list
+	 * @param array $vars
 	 * @param array $previous_list
 	 * @param string $type
 	 * @param array $exclude_list
 	 * @return array
 	 */
-	private static function get_wp_config_diff( $list, $previous_list, $type, $exclude_list = [] ) {
+	private static function get_wp_config_diff( $vars, $previous_list, $type, $exclude_list = [] ) {
 		$result = [];
-		foreach ( $list as $name => $val ) {
+		foreach ( $vars as $name => $val ) {
 			if ( array_key_exists( $name, $previous_list ) || in_array( $name, $exclude_list, true ) ) {
 				continue;
 			}