diff --git a/src/Client.php b/src/Client.php
index 85917fe..ad9777b 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -143,7 +143,7 @@
  * All public methods of the `Client` are considered *advanced usage*.
  * If you want to call RPC functions, see below for the [`Proxy`](#proxy) class.
  */
-final class Client
+class Client
 {
     private $browser;
     private $encoder;
diff --git a/tests/ProxyTest.php b/tests/ProxyTest.php
new file mode 100644
index 0000000..9081cc1
--- /dev/null
+++ b/tests/ProxyTest.php
@@ -0,0 +1,16 @@
+<?php
+
+use PHPUnit\Framework\TestCase;
+use Clue\React\Soap\Proxy;
+
+class ProxyTest extends TestCase
+{
+    public function testFunctionWillBeForwardedToClient()
+    {
+        $client = $this->getMockBuilder('Clue\React\Soap\Client')->disableOriginalConstructor()->getMock();
+        $client->expects($this->once())->method('soapCall')->with('demo', array(1, 2));
+
+        $proxy = new Proxy($client);
+        $proxy->demo(1, 2);
+    }
+}