diff --git a/src/JsonSchema/Uri/Retrievers/FileGetContents.php b/src/JsonSchema/Uri/Retrievers/FileGetContents.php
index 34e6ede0..cf566d64 100644
--- a/src/JsonSchema/Uri/Retrievers/FileGetContents.php
+++ b/src/JsonSchema/Uri/Retrievers/FileGetContents.php
@@ -27,16 +27,7 @@ class FileGetContents extends AbstractRetriever
      */
     public function retrieve($uri)
     {
-        $errorMessage = null;
-        set_error_handler(function ($errno, $errstr) use (&$errorMessage) {
-            $errorMessage = $errstr;
-        });
-        $response = file_get_contents($uri);
-        restore_error_handler();
-
-        if ($errorMessage) {
-            throw new ResourceNotFoundException($errorMessage);
-        }
+        $response = $this->getContents($uri);
 
         if (false === $response) {
             throw new ResourceNotFoundException('JSON schema not found at ' . $uri);
@@ -61,6 +52,27 @@ public function retrieve($uri)
         return $this->messageBody;
     }
 
+    /**
+     * @param string $uri
+     *
+     * @return string|bool
+     */
+    protected function getContents($uri)
+    {
+        $errorMessage = null;
+        set_error_handler(function ($errno, $errstr) use (&$errorMessage) {
+            $errorMessage = $errstr;
+        });
+        $response = file_get_contents($uri);
+        restore_error_handler();
+
+        if ($errorMessage) {
+            throw new ResourceNotFoundException($errorMessage);
+        }
+
+        return $response;
+    }
+
     /**
      * @param array $headers HTTP Response Headers
      *
@@ -68,7 +80,7 @@ public function retrieve($uri)
      */
     private function fetchContentType(array $headers)
     {
-        foreach (array_reverse($headers) as $header) {
+        foreach ($headers as $header) {
             if ($this->contentType = self::getContentTypeMatchInHeader($header)) {
                 return true;
             }