diff --git a/src/Composer/Util/RemoteFilesystem.php b/src/Composer/Util/RemoteFilesystem.php
index afb942850..09ab6188a 100644
--- a/src/Composer/Util/RemoteFilesystem.php
+++ b/src/Composer/Util/RemoteFilesystem.php
@@ -560,7 +560,7 @@ class RemoteFilesystem
         $tlsOptions = array();
 
         // Setup remaining TLS options - the matching may need monitoring, esp. www vs none in CN
-        if ($this->disableTls === false && PHP_VERSION_ID < 50600) {
+        if ($this->disableTls === false && PHP_VERSION_ID < 50600 && !stream_is_local($this->fileUrl)) {
             $host = parse_url($this->fileUrl, PHP_URL_HOST);
 
             if ($host === 'github.com' || $host === 'api.github.com') {