diff --git a/contributing/code/bugs.rst b/contributing/code/bugs.rst
index a3651de1496..ddb786f17d9 100644
--- a/contributing/code/bugs.rst
+++ b/contributing/code/bugs.rst
@@ -25,6 +25,10 @@ If your problem definitely looks like a bug, report it using the official bug
 * Describe the steps needed to reproduce the bug with short code examples
   (providing a unit test that illustrates the bug is best);
 
+* If the bug you experienced affects more than one layer, providing a simple
+  failing unit test may not be sufficient. In this case, please fork the
+  `Symfony Standard Edition`_ and reproduce your issue on a new branch;
+
 * Give as much detail as possible about your environment (OS, PHP version,
   Symfony version, enabled extensions, ...);
 
@@ -35,3 +39,4 @@ If your problem definitely looks like a bug, report it using the official bug
 .. _forum: http://forum.symfony-project.org/
 .. _IRC channel: irc://irc.freenode.net/symfony
 .. _tracker: https://github.com/symfony/symfony/issues
+.. _Symfony Standard Edition: https://github.com/symfony/symfony-standard/