public function tearDown()
 {
     $toxiproxy = new Toxiproxy(self::httpClientFactory());
     $proxy = $toxiproxy[self::TEST_NAME];
     if (!is_null($proxy)) {
         $toxiproxy->delete($proxy);
     }
 }
<?php

require "./vendor/autoload.php";
use GuzzleHttp\Client as HttpClient;
use Ihsw\Toxiproxy\Toxiproxy;
$toxiproxy = new Toxiproxy(new HttpClient(["base_url" => "http://127.0.0.1:8474"]));
$proxies = array_filter($toxiproxy->all(), function ($proxy) {
    return strlen($proxy->getName()) > 0;
});
foreach ($proxies as $proxy) {
    $toxiproxy->delete($proxy);
}