diff --git a/tests/Peru/Sunat/Async/HttpClientStub.php b/tests/Peru/Sunat/Async/HttpClientStub.php
new file mode 100644
index 0000000..dd033b6
--- /dev/null
+++ b/tests/Peru/Sunat/Async/HttpClientStub.php
@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Peru\Sunat\Async;
+
+use Peru\Http\Async\ClientInterface;
+use React\Promise\PromiseInterface;
+use Tests\Peru\Sunat\ClientStubDecorator;
+
+class HttpClientStub implements ClientInterface
+{
+    /**
+     * @var ClientInterface
+     */
+    private $client;
+
+    /**
+     * HttpClientStub constructor.
+     * @param ClientInterface $client
+     */
+    public function __construct(ClientInterface $client)
+    {
+        $this->client = $client;
+    }
+
+    /**
+     * Make GET Request.
+     *
+     * @param string $url
+     * @param array $headers
+     *
+     * @return PromiseInterface
+     */
+    public function getAsync(string $url, array $headers = []): PromiseInterface
+    {
+        return $this->client->getAsync(ClientStubDecorator::getNewUrl($url), $headers);
+    }
+}
\ No newline at end of file
diff --git a/tests/Peru/Sunat/Async/RucTest.php b/tests/Peru/Sunat/Async/RucTest.php
index 452be80..c8351fc 100644
--- a/tests/Peru/Sunat/Async/RucTest.php
+++ b/tests/Peru/Sunat/Async/RucTest.php
@@ -6,10 +6,7 @@
 
 use function Clue\React\Block\await;
 use Peru\Http\Async\HttpClient;
-use Peru\Sunat\Async\Ruc;
-use Peru\Sunat\Company;
-use Peru\Sunat\HtmlParser;
-use Peru\Sunat\RucParser;
+use Peru\Sunat\{Async\Ruc, Company, HtmlParser, RucParser};
 use PHPUnit\Framework\TestCase;
 use React\EventLoop\Factory;
 
@@ -21,7 +18,7 @@ class RucTest extends TestCase
     public function testGetRuc()
     {
         $loop = Factory::create();
-        $cs = new Ruc(new HttpClient($loop), new RucParser(new HtmlParser()));
+        $cs = new Ruc(new HttpClientStub(new HttpClient($loop)), new RucParser(new HtmlParser()));
         $promise = $cs->get('10401510465');
         /**@var $company Company */
         $company = await($promise, $loop);
diff --git a/tests/Peru/Sunat/ClientStubDecorator.php b/tests/Peru/Sunat/ClientStubDecorator.php
index 115ab39..6df2042 100644
--- a/tests/Peru/Sunat/ClientStubDecorator.php
+++ b/tests/Peru/Sunat/ClientStubDecorator.php
@@ -38,7 +38,7 @@ public function __construct(ClientInterface $client)
      */
     public function get(string $url, array $headers = [])
     {
-        return $this->client->get($this->getNewUrl($url), $headers);
+        return $this->client->get(self::getNewUrl($url), $headers);
     }
 
     /**
@@ -52,10 +52,10 @@ public function get(string $url, array $headers = [])
      */
     public function post(string $url, $data, array $headers = [])
     {
-        return $this->client->post($this->getNewUrl($url), $data, $headers);
+        return $this->client->post(self::getNewUrl($url), $data, $headers);
     }
 
-    private function getNewUrl($url)
+    public static function getNewUrl($url)
     {
         $urlBase = getenv('MOCK_URL');
         $u = parse_url($url);