diff --git a/Controller/ImagineController.php b/Controller/ImagineController.php
index 4b2988f1c..3dfaa9e59 100644
--- a/Controller/ImagineController.php
+++ b/Controller/ImagineController.php
@@ -78,9 +78,10 @@ public function filterAction(Request $request, $path, $filter)
     {
         // decoding special characters and whitespaces from path obtained from url
         $path = urldecode($path);
+        $resolver = $request->get('resolver');
 
         try {
-            if (!$this->cacheManager->isStored($path, $filter)) {
+            if (!$this->cacheManager->isStored($path, $filter, $resolver)) {
                 try {
                     $binary = $this->dataManager->find($filter, $path);
                 } catch (NotLoadableException $e) {
@@ -94,11 +95,12 @@ public function filterAction(Request $request, $path, $filter)
                 $this->cacheManager->store(
                     $this->filterManager->applyFilter($binary, $filter),
                     $path,
-                    $filter
+                    $filter,
+                    $resolver
                 );
             }
 
-            return new RedirectResponse($this->cacheManager->resolve($path, $filter), 301);
+            return new RedirectResponse($this->cacheManager->resolve($path, $filter, $resolver), 301);
         } catch (NonExistingFilterException $e) {
             $message = sprintf('Could not locate filter "%s" for path "%s". Message was "%s"', $filter, $path, $e->getMessage());
 
@@ -127,6 +129,8 @@ public function filterAction(Request $request, $path, $filter)
      */
     public function filterRuntimeAction(Request $request, $hash, $path, $filter)
     {
+        $resolver = $request->get('resolver');
+
         try {
             $filters = $request->query->get('filters', array());
 
@@ -160,10 +164,11 @@ public function filterRuntimeAction(Request $request, $hash, $path, $filter)
                     'filters' => $filters,
                 )),
                 $rcPath,
-                $filter
+                $filter,
+                $resolver
             );
 
-            return new RedirectResponse($this->cacheManager->resolve($rcPath, $filter), 301);
+            return new RedirectResponse($this->cacheManager->resolve($rcPath, $filter, $resolver), 301);
         } catch (NonExistingFilterException $e) {
             $message = sprintf('Could not locate filter "%s" for path "%s". Message was "%s"', $filter, $hash.'/'.$path, $e->getMessage());
 
diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index 426c914bf..9fdc77ea4 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -43,6 +43,7 @@ public function getConfigTreeBuilder()
                 ->arrayNode('resolvers')
                     ->useAttributeAsKey('name')
                     ->prototype('array')
+                        ->performNoDeepMerging()
         ;
         $this->addResolversSections($resolversPrototypeNode);
 
diff --git a/Imagine/Cache/CacheManager.php b/Imagine/Cache/CacheManager.php
index 588978151..e8d89ad1f 100644
--- a/Imagine/Cache/CacheManager.php
+++ b/Imagine/Cache/CacheManager.php
@@ -88,16 +88,22 @@ public function addResolver($filter, ResolverInterface $resolver)
      * In case there is no specific resolver, but a default resolver has been configured, the default will be returned.
      *
      * @param string $filter
+     * @param string $resolver
      *
      * @return ResolverInterface
      *
      * @throws \OutOfBoundsException If neither a specific nor a default resolver is available.
      */
-    protected function getResolver($filter)
+    protected function getResolver($filter, $resolver)
     {
-        $config = $this->filterConfig->get($filter);
+        // BC
+        if (false == $resolver) {
+            $config = $this->filterConfig->get($filter);
 
-        $resolverName = empty($config['cache']) ? $this->defaultResolver : $config['cache'];
+            $resolverName = empty($config['cache']) ? $this->defaultResolver : $config['cache'];
+        } else {
+            $resolverName = $resolver;
+        }
 
         if (!isset($this->resolvers[$resolverName])) {
             throw new \OutOfBoundsException(sprintf(
@@ -117,23 +123,24 @@ protected function getResolver($filter)
      * @param string $path          The path where the resolved file is expected.
      * @param string $filter
      * @param array  $runtimeConfig
+     * @param string $resolver
      *
      * @return string
      */
-    public function getBrowserPath($path, $filter, array $runtimeConfig = array())
+    public function getBrowserPath($path, $filter, array $runtimeConfig = array(), $resolver = null)
     {
         if (!empty($runtimeConfig)) {
             $rcPath = $this->getRuntimePath($path, $runtimeConfig);
 
-            return $this->isStored($rcPath, $filter) ?
-                $this->resolve($rcPath, $filter) :
-                $this->generateUrl($path, $filter, $runtimeConfig)
+            return $this->isStored($rcPath, $filter, $resolver) ?
+                $this->resolve($rcPath, $filter, $resolver) :
+                $this->generateUrl($path, $filter, $runtimeConfig, $resolver)
             ;
         }
 
-        return $this->isStored($path, $filter) ?
-            $this->resolve($path, $filter) :
-            $this->generateUrl($path, $filter)
+        return $this->isStored($path, $filter, $resolver) ?
+            $this->resolve($path, $filter, $resolver) :
+            $this->generateUrl($path, $filter, array(), $resolver)
         ;
     }
 
@@ -142,6 +149,8 @@ public function getBrowserPath($path, $filter, array $runtimeConfig = array())
      *
      * @param string $path
      * @param array  $runtimeConfig
+     *
+     * @return string
      */
     public function getRuntimePath($path, array $runtimeConfig)
     {
@@ -154,16 +163,21 @@ public function getRuntimePath($path, array $runtimeConfig)
      * @param string $path          The path where the resolved file is expected.
      * @param string $filter        The name of the imagine filter in effect.
      * @param array  $runtimeConfig
+     * @param string $resolver
      *
      * @return string
      */
-    public function generateUrl($path, $filter, array $runtimeConfig = array())
+    public function generateUrl($path, $filter, array $runtimeConfig = array(), $resolver = null)
     {
         $params = array(
             'path' => ltrim($path, '/'),
             'filter' => $filter,
         );
 
+        if ($resolver) {
+            $params['resolver'] = $resolver;
+        }
+
         if (empty($runtimeConfig)) {
             $filterUrl = $this->router->generate('liip_imagine_filter', $params, UrlGeneratorInterface::ABSOLUTE_URL);
         } else {
@@ -181,12 +195,13 @@ public function generateUrl($path, $filter, array $runtimeConfig = array())
      *
      * @param string $path
      * @param string $filter
+     * @param string $resolver
      *
      * @return bool
      */
-    public function isStored($path, $filter)
+    public function isStored($path, $filter, $resolver = null)
     {
-        return $this->getResolver($filter)->isStored($path, $filter);
+        return $this->getResolver($filter, $resolver)->isStored($path, $filter);
     }
 
     /**
@@ -194,12 +209,13 @@ public function isStored($path, $filter)
      *
      * @param string $path
      * @param string $filter
+     * @param string $resolver
      *
      * @return string The url of resolved image.
      *
      * @throws NotFoundHttpException if the path can not be resolved
      */
-    public function resolve($path, $filter)
+    public function resolve($path, $filter, $resolver = null)
     {
         if (false !== strpos($path, '/../') || 0 === strpos($path, '../')) {
             throw new NotFoundHttpException(sprintf("Source image was searched with '%s' outside of the defined root path", $path));
@@ -208,7 +224,7 @@ public function resolve($path, $filter)
         $preEvent = new CacheResolveEvent($path, $filter);
         $this->dispatcher->dispatch(ImagineEvents::PRE_RESOLVE, $preEvent);
 
-        $url = $this->getResolver($preEvent->getFilter())->resolve($preEvent->getPath(), $preEvent->getFilter());
+        $url = $this->getResolver($preEvent->getFilter(), $resolver)->resolve($preEvent->getPath(), $preEvent->getFilter());
 
         $postEvent = new CacheResolveEvent($preEvent->getPath(), $preEvent->getFilter(), $url);
         $this->dispatcher->dispatch(ImagineEvents::POST_RESOLVE, $postEvent);
@@ -222,10 +238,11 @@ public function resolve($path, $filter)
      * @param BinaryInterface $binary
      * @param string          $path
      * @param string          $filter
+     * @param string          $resolver
      */
-    public function store(BinaryInterface $binary, $path, $filter)
+    public function store(BinaryInterface $binary, $path, $filter, $resolver = null)
     {
-        $this->getResolver($filter)->store($binary, $path, $filter);
+        $this->getResolver($filter, $resolver)->store($binary, $path, $filter);
     }
 
     /**
@@ -249,7 +266,7 @@ public function remove($paths = null, $filters = null)
 
         $mapping = new \SplObjectStorage();
         foreach ($filters as $filter) {
-            $resolver = $this->getResolver($filter);
+            $resolver = $this->getResolver($filter, null);
 
             $list = isset($mapping[$resolver]) ? $mapping[$resolver] : array();
 
diff --git a/Templating/ImagineExtension.php b/Templating/ImagineExtension.php
index 321c703ac..9fb4ae96d 100644
--- a/Templating/ImagineExtension.php
+++ b/Templating/ImagineExtension.php
@@ -37,12 +37,13 @@ public function getFilters()
      * @param string $path
      * @param string $filter
      * @param array  $runtimeConfig
+     * @param string $resolver
      *
      * @return \Twig_Markup
      */
-    public function filter($path, $filter, array $runtimeConfig = array())
+    public function filter($path, $filter, array $runtimeConfig = array(), $resolver = null)
     {
-        return $this->cacheManager->getBrowserPath($path, $filter, $runtimeConfig);
+        return $this->cacheManager->getBrowserPath($path, $filter, $runtimeConfig, $resolver);
     }
 
     /**
diff --git a/Tests/Binary/Loader/GridFSLoaderTest.php b/Tests/Binary/Loader/GridFSLoaderTest.php
index 8dd80450b..c43926a0a 100644
--- a/Tests/Binary/Loader/GridFSLoaderTest.php
+++ b/Tests/Binary/Loader/GridFSLoaderTest.php
@@ -24,7 +24,10 @@ class GridFSLoaderTest extends \PHPUnit_Framework_TestCase
     public function setUp()
     {
         if (!extension_loaded('mongodb')) {
-            $this->markTestSkipped('ext/mongodb not installed');
+            $this->markTestSkipped('ext/mongodb is not installed');
+        }
+        if (!class_exists('Doctrine\MongoDB\GridFSFile')) {
+            $this->markTestSkipped('doctrine mongo odm is not installed');
         }
         $this->repo = $this->getMockBuilder('Doctrine\ODM\MongoDB\DocumentRepository')->disableOriginalConstructor()->getMock();