diff --git a/ChainOfResponsibilities/Handler.php b/ChainOfResponsibilities/Handler.php
index 7511221..907e6a9 100644
--- a/ChainOfResponsibilities/Handler.php
+++ b/ChainOfResponsibilities/Handler.php
@@ -51,6 +51,7 @@ abstract class Handler
      */
     final public function handle(Request $req)
     {
+        $req->forDebugOnly = get_called_class();
         $processed = $this->processing($req);
         if (!$processed) {
             // the request has not been processed by this handler => see the next
diff --git a/Tests/ChainOfResponsibilities/ChainTest.php b/Tests/ChainOfResponsibilities/ChainTest.php
index 6a9fa99..337559b 100644
--- a/Tests/ChainOfResponsibilities/ChainTest.php
+++ b/Tests/ChainOfResponsibilities/ChainTest.php
@@ -23,14 +23,56 @@ class ChainTest extends \PHPUnit_Framework_TestCase
         $this->chain->append(new Responsible\SlowStorage(array('bar' => 'baz', 'foo' => 'bar')));
     }
 
-    public function testProcess()
+    public function makeRequest()
     {
         $request = new Request();
         $request->verb = 'get';
-        $request->key = 'bar';
+        return array(
+            array($request)
+        );
+    }
 
+    /**
+     * @dataProvider makeRequest
+     */
+    public function testFastStorage($request)
+    {
+        $request->key = 'bar';
         $ret = $this->chain->handle($request);
-        print_r($request);
+
+        $this->assertTrue($ret);
+        $this->assertObjectHasAttribute('response', $request);
+        $this->assertEquals('baz', $request->response);
+        // despite both handle owns the 'bar' key, the FastStorage is responding first
+        $this->assertEquals('DesignPatterns\ChainOfResponsibilities\Responsible\FastStorage', $request->forDebugOnly);
+    }
+
+    /**
+     * @dataProvider makeRequest
+     */
+    public function testSlowStorage($request)
+    {
+        $request->key = 'foo';
+        $ret = $this->chain->handle($request);
+
+        $this->assertTrue($ret);
+        $this->assertObjectHasAttribute('response', $request);
+        $this->assertEquals('bar', $request->response);
+        // FastStorage has no 'foo' key, the SlowStorage is responding
+        $this->assertEquals('DesignPatterns\ChainOfResponsibilities\Responsible\SlowStorage', $request->forDebugOnly);
+    }
+
+    /**
+     * @dataProvider makeRequest
+     */
+    public function testFailure($request)
+    {
+        $request->key = 'kurukuku';
+        $ret = $this->chain->handle($request);
+
+        $this->assertFalse($ret);
+        // the last rsponsible :
+        $this->assertEquals('DesignPatterns\ChainOfResponsibilities\Responsible\SlowStorage', $request->forDebugOnly);
     }
 
 }
\ No newline at end of file