diff --git a/Resources/config/methods.xml b/Resources/config/methods.xml
index 5e18893..63835f3 100644
--- a/Resources/config/methods.xml
+++ b/Resources/config/methods.xml
@@ -4,6 +4,10 @@
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
 
+    <parameters>
+        <parameter key="eko.guzzle_client.class">GuzzleHttp\Client</parameter>
+    </parameters>
+
     <services>
         <!-- Manager -->
 
@@ -21,19 +25,26 @@
             <tag name="eko.google_translate.method" />
 
             <argument>%eko_google_translate.api_key%</argument>
+            <argument type="service" id="eko.guzzle_client" />
         </service>
 
         <service id="eko.google_translate.languages" class="Eko\GoogleTranslateBundle\Translate\Method\Languages">
             <tag name="eko.google_translate.method" />
 
             <argument>%eko_google_translate.api_key%</argument>
+            <argument type="service" id="eko.guzzle_client" />
         </service>
 
         <service id="eko.google_translate.translator" class="Eko\GoogleTranslateBundle\Translate\Method\Translator">
             <tag name="eko.google_translate.method" />
 
             <argument>%eko_google_translate.api_key%</argument>
+            <argument type="service" id="eko.guzzle_client" />
             <argument type="service" id="eko.google_translate.detector" />
         </service>
+        
+        <service id="eko.guzzle_client" class="%eko.guzzle_client.class%">
+            
+        </service>
     </services>
 </container>
diff --git a/Tests/Method/DetectorTest.php b/Tests/Method/DetectorTest.php
index 0478554..b1feaf8 100644
--- a/Tests/Method/DetectorTest.php
+++ b/Tests/Method/DetectorTest.php
@@ -28,13 +28,9 @@ protected function setUp()
     {
         $this->detector = $this->getMock(
             'Eko\GoogleTranslateBundle\Translate\Method\Detector',
-            ['getClient'],
-            ['fakeapikey']
+            null,
+            ['fakeapikey', $this->getClientMock()]
         );
-
-        $clientMock = $this->getClientMock();
-
-        $this->detector->expects($this->any())->method('getClient')->will($this->returnValue($clientMock));
     }
 
     /**
diff --git a/Tests/Method/LanguagesTest.php b/Tests/Method/LanguagesTest.php
index ae15c7d..75f0184 100644
--- a/Tests/Method/LanguagesTest.php
+++ b/Tests/Method/LanguagesTest.php
@@ -28,13 +28,9 @@ protected function setUp()
     {
         $this->languages = $this->getMock(
             'Eko\GoogleTranslateBundle\Translate\Method\Languages',
-            ['getClient'],
-            ['fakeapikey']
+            null,
+            ['fakeapikey', $this->getClientMock()]
         );
-
-        $clientMock = $this->getClientMock();
-
-        $this->languages->expects($this->any())->method('getClient')->will($this->returnValue($clientMock));
     }
 
     /**
diff --git a/Tests/Method/TranslatorTest.php b/Tests/Method/TranslatorTest.php
index 6929412..8dca3e8 100644
--- a/Tests/Method/TranslatorTest.php
+++ b/Tests/Method/TranslatorTest.php
@@ -28,13 +28,9 @@ protected function setUp()
     {
         $this->translator = $this->getMock(
             'Eko\GoogleTranslateBundle\Translate\Method\Translator',
-            ['getClient'],
-            ['fakeapikey', $this->getDetectorMock()]
+            null,
+            ['fakeapikey', $this->getClientMock(), $this->getDetectorMock()]
         );
-
-        $clientMock = $this->getClientMock();
-
-        $this->translator->expects($this->any())->method('getClient')->will($this->returnValue($clientMock));
     }
 
     /**
@@ -70,8 +66,7 @@ public function testPlainTextTranslate()
         // Then
         $this->assertEquals($value, "J'ai", 'Should return "J\'ai"');
     }
-    
-    
+
     /**
      * Test multiple translate method using an array.
      */
diff --git a/Translate/Method.php b/Translate/Method.php
index ff22a7a..69b23e3 100644
--- a/Translate/Method.php
+++ b/Translate/Method.php
@@ -10,7 +10,7 @@
 
 namespace Eko\GoogleTranslateBundle\Translate;
 
-use GuzzleHttp\Client as GuzzleClient;
+use GuzzleHttp\ClientInterface;
 use Symfony\Component\Stopwatch\Stopwatch;
 use Symfony\Component\Stopwatch\StopwatchEvent;
 
@@ -29,7 +29,7 @@ class Method
     protected $apiKey = null;
 
     /**
-     * @var GuzzleClient A Guzzle client instance
+     * @var ClientInterface A Guzzle client instance
      */
     protected $client;
 
@@ -54,23 +54,23 @@ class Method
     protected $counter = 1;
 
     /**
-     * Constructor.
+     * Method constructor.
      *
-     * @param string    $apiKey    API key retrieved from configuration
-     * @param Stopwatch $stopwatch Symfony profiler Stopwatch service
+     * @param string          $apiKey    API key retrieved from configuration
+     * @param ClientInterface $client
+     * @param Stopwatch       $stopwatch Symfony profiler Stopwatch service
      */
-    public function __construct($apiKey, Stopwatch $stopwatch = null)
+    public function __construct($apiKey, ClientInterface $client, Stopwatch $stopwatch = null)
     {
-        $this->apiKey = $apiKey;
-        $this->client = new GuzzleClient();
-
+        $this->apiKey    = $apiKey;
+        $this->client    = $client;
         $this->stopwatch = $stopwatch;
     }
 
     /**
      * Returns Guzzle HTTP client instance.
      *
-     * @return GuzzleClient
+     * @return ClientInterface
      */
     public function getClient()
     {
diff --git a/Translate/Method/Translator.php b/Translate/Method/Translator.php
index 60fcfb0..66a8e6e 100644
--- a/Translate/Method/Translator.php
+++ b/Translate/Method/Translator.php
@@ -12,6 +12,7 @@
 
 use Eko\GoogleTranslateBundle\Translate\Method;
 use Eko\GoogleTranslateBundle\Translate\MethodInterface;
+use GuzzleHttp\ClientInterface;
 use Symfony\Component\Stopwatch\Stopwatch;
 
 /**
@@ -49,15 +50,16 @@ class Translator extends Method implements MethodInterface
     /**
      * Constructor.
      *
-     * @param string    $apiKey    Google Translate API key
-     * @param Detector  $detector  A Detector service
-     * @param Stopwatch $stopwatch Symfony profiler stopwatch service
+     * @param string          $apiKey    Google Translate API key
+     * @param ClientInterface $client
+     * @param Detector        $detector  A Detector service
+     * @param Stopwatch       $stopwatch Symfony profiler stopwatch service
      */
-    public function __construct($apiKey, Detector $detector, Stopwatch $stopwatch = null)
+    public function __construct($apiKey, ClientInterface $client, Detector $detector, Stopwatch $stopwatch = null)
     {
         $this->detector = $detector;
 
-        return parent::__construct($apiKey, $stopwatch);
+        return parent::__construct($apiKey, $client, $stopwatch);
     }
 
     /**