diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 117227a..0cc5451 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -16,6 +16,12 @@
         </testsuite>
     </testsuites>
 
+    <testsuites>
+        <testsuite name="integration">
+            <directory>./tests/integration/</directory>
+        </testsuite>
+    </testsuites>
+
     <filter>
         <whitelist>
             <directory>./src/</directory>
diff --git a/tests/integration/GuzzleTest.php b/tests/integration/GuzzleTest.php
new file mode 100644
index 0000000..6d3a544
--- /dev/null
+++ b/tests/integration/GuzzleTest.php
@@ -0,0 +1,53 @@
+<?php
+use Guzzle\Http\Message\Request;
+
+class GuzzleTest extends \PHPUnit_Framework_TestCase {
+    protected $_request;
+
+    protected $_headers = array(
+        'Upgrade' => 'websocket'
+      , 'Connection' => 'Upgrade'
+      , 'Host' => 'localhost:8080'
+      , 'Origin' => 'chrome://newtab'
+      , 'Sec-WebSocket-Protocol' => 'one, two, three'
+      , 'Sec-WebSocket-Key' => '9bnXNp3ae6FbFFRtPdiPXA=='
+      , 'Sec-WebSocket-Version' => '13'
+    );
+
+    public function setUp() {
+        $this->_request = new Request('GET', 'http://localhost', $this->_headers);
+    }
+
+    public function testGetHeaderString() {
+        $this->assertEquals('Upgrade', (string)$this->_request->getHeader('connection'));
+        $this->assertEquals('9bnXNp3ae6FbFFRtPdiPXA==', (string)$this->_request->getHeader('Sec-Websocket-Key'));
+    }
+
+    public function testGetHeaderInteger() {
+        $this->assertSame('13', (string)$this->_request->getHeader('Sec-Websocket-Version'));
+        $this->assertSame(13, (int)(string)$this->_request->getHeader('Sec-WebSocket-Version'));
+    }
+
+    public function testGetHeaderObject() {
+        $this->assertInstanceOf('Guzzle\Http\Message\Header', $this->_request->getHeader('Origin'));
+        $this->assertNull($this->_request->getHeader('Non-existant-header'));
+    }
+
+    public function testHeaderObjectNormalizeValues() {
+        $expected  = 1 + substr_count($this->_headers['Sec-WebSocket-Protocol'], ',');
+        $protocols = $this->_request->getHeader('Sec-WebSocket-Protocol')->normalize();
+        $count     = 0;
+
+        foreach ($protocols as $protocol) {
+            $count++;
+        }
+
+        $this->assertEquals($expected, $count);
+        $this->assertEquals($expected, count($protocols));
+    }
+
+    public function testRequestFactoryCreateSignature() {
+        $ref = new \ReflectionMethod('Guzzle\Http\Message\RequestFactory', 'create');
+        $this->assertEquals(2, $ref->getNumberOfRequiredParameters());
+    }
+}
\ No newline at end of file