diff --git a/.gitmodules b/.gitmodules
index 1fb4a04d..2a2dfe9a 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,6 @@
 [submodule "vendor/Doctrine"]
 	path = vendor/Doctrine
 	url = https://github.com/doctrine/common
+[submodule "vendor/Monolog"]
+	path = vendor/Monolog
+	url = https://github.com/Seldaek/monolog.git
diff --git a/src/Guzzle/Common/Log/MonologLogAdapter.php b/src/Guzzle/Common/Log/MonologLogAdapter.php
new file mode 100644
index 00000000..85f70288
--- /dev/null
+++ b/src/Guzzle/Common/Log/MonologLogAdapter.php
@@ -0,0 +1,45 @@
+<?php
+/**
+ * @package Guzzle PHP <http://www.guzzlephp.org>
+ * @license See the LICENSE file that was distributed with this source code.
+ */
+
+namespace Guzzle\Common\Log;
+
+use Monolog\Logger;
+
+/**
+ * Monolog log adapter
+ *
+ * @author Michael Dowling <michael@guzzlephp.org>
+ * @link https://github.com/Seldaek/monolog
+ */
+class MonologLogAdapter extends AbstractLogAdapter
+{
+    /**
+     * Adapt a Monolog Logger object
+     *
+     * @param Logger $logObject Log object to adapt
+     * @throws InvalidArgumentException
+     */
+    public function __construct($logObject)
+    {
+        if (!($logObject instanceof Logger)) {
+            throw new \InvalidArgumentException(
+                'Object must be an instance of Monolog\Logger'
+            );
+        }
+
+        $this->log = $logObject;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function log($message, $priority = LOG_INFO, $extras = null)
+    {
+        $this->log->addRecord($priority, $message);
+
+        return $this;
+    }
+}
\ No newline at end of file
diff --git a/src/Guzzle/Common/Log/ZendLogAdapter.php b/src/Guzzle/Common/Log/ZendLogAdapter.php
index d0811101..76b5c774 100644
--- a/src/Guzzle/Common/Log/ZendLogAdapter.php
+++ b/src/Guzzle/Common/Log/ZendLogAdapter.php
@@ -33,7 +33,7 @@ class ZendLogAdapter extends AbstractLogAdapter
     /**
      * {@inheritdoc}
      */
-    public function log($message, $priority = self::INFO, $extras = null)
+    public function log($message, $priority = LOG_INFO, $extras = null)
     {
         $this->log->log($message, $priority, $extras);
 
diff --git a/tests/Guzzle/Tests/Common/Log/MonologLogAdapterTest.php b/tests/Guzzle/Tests/Common/Log/MonologLogAdapterTest.php
new file mode 100644
index 00000000..08e78828
--- /dev/null
+++ b/tests/Guzzle/Tests/Common/Log/MonologLogAdapterTest.php
@@ -0,0 +1,47 @@
+<?php
+/**
+ * @package Guzzle PHP <http://www.guzzlephp.org>
+ * @license See the LICENSE file that was distributed with this source code.
+ */
+
+namespace Guzzle\Tests\Common\Log;
+
+use Guzzle\Common\Log\MonologLogAdapter;
+use Monolog\Logger;
+use Monolog\Handler\TestHandler;
+
+/**
+ * @author Michael Dowling <michael@guzzlephp.org>
+ */
+class MonologLogAdapterTest extends \Guzzle\Tests\GuzzleTestCase
+{
+    /**
+     * @covers Guzzle\Common\Log\MonologLogAdapter::__construct
+     * @expectedException InvalidArgumentException
+     */
+    public function testEnforcesType()
+    {
+        // A successful construction
+        $log = new Logger('test');
+        $log->pushHandler(new TestHandler());
+        $adapter = new MonologLogAdapter($log);
+
+        // Throws an exception
+        $this->adapter = new MonologLogAdapter(new \stdClass());
+    }
+
+    /**
+     * @covers Guzzle\Common\Log\MonologLogAdapter::log
+     */
+    public function testLogsMessagesToAdaptedObject()
+    {
+        $log = new Logger('test');
+        $handler = new TestHandler();
+        $log->pushHandler($handler);
+        $adapter = new MonologLogAdapter($log);
+
+        $adapter->log('test!', Logger::INFO);
+
+        $this->assertTrue($handler->hasInfoRecords());
+    }
+}
diff --git a/tests/Guzzle/Tests/Common/Log/ZendLogAdapterTest.php b/tests/Guzzle/Tests/Common/Log/ZendLogAdapterTest.php
index c93b0795..87db8e19 100644
--- a/tests/Guzzle/Tests/Common/Log/ZendLogAdapterTest.php
+++ b/tests/Guzzle/Tests/Common/Log/ZendLogAdapterTest.php
@@ -37,27 +37,12 @@ class ZendLogAdapterTest extends \Guzzle\Tests\GuzzleTestCase
         $this->adapter = new ZendLogAdapter($this->log);
     }
 
-    /**
-     * Check for the existence of the Zend_Framework in your path
-     */
-    protected function zfSkip()
-    {
-        if (!class_exists('\Zend_Log')) {
-            $this->markTestSkipped(
-                'The Zend Framework is not present in your path'
-            );
-            return;
-        }
-    }
-
     /**
      * @covers Guzzle\Common\Log\AbstractLogAdapter::__construct
      * @expectedException InvalidArgumentException
      */
-    public function testConstruct()
+    public function testEnforcesType()
     {
-        $this->zfSkip();
-        
         // A successful construction
         $this->adapter = new ZendLogAdapter($this->log, new Collection());
         
@@ -71,8 +56,6 @@ class ZendLogAdapterTest extends \Guzzle\Tests\GuzzleTestCase
      */
     public function testLogsMessagesToAdaptedObject()
     {
-        $this->zfSkip();
-        
         // Test without a priority
         $this->adapter->log('test', \LOG_NOTICE, 'guzzle.common.log.adapter.zend_log_adapter', 'localhost');
         $this->assertEquals(1, substr_count(ob_get_contents(), 'test'));
@@ -87,8 +70,6 @@ class ZendLogAdapterTest extends \Guzzle\Tests\GuzzleTestCase
      */
     public function testExposesAdaptedLogObject()
     {
-        $this->zfSkip();
-        
         $this->assertEquals($this->log, $this->adapter->getLogObject());
     }
 }
\ No newline at end of file
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index baf6ff60..132a4150 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -17,7 +17,8 @@ $classLoader = new \Symfony\Component\ClassLoader\UniversalClassLoader();
 $classLoader->registerNamespaces(array(
     'Guzzle\Tests' => __DIR__,
     'Guzzle' => __DIR__ . '/../src',
-    'Doctrine' => __DIR__ . '/../vendor/Doctrine/lib'
+    'Doctrine' => __DIR__ . '/../vendor/Doctrine/lib',
+    'Monolog' => __DIR__ . '/../vendor/Monolog/src'
 ));
 
 $classLoader->registerPrefix('Zend_',  __DIR__ . '/../vendor');
diff --git a/vendor/Monolog b/vendor/Monolog
new file mode 160000
index 00000000..ea466fa8
--- /dev/null
+++ b/vendor/Monolog
@@ -0,0 +1 @@
+Subproject commit ea466fa84863ef15e5dd178d14a804a1efbfd07a