From 167b1fff73de67d31312287ebe9c00d7b3a9e605 Mon Sep 17 00:00:00 2001
From: Javier Eguiluz <javier.eguiluz@gmail.com>
Date: Mon, 23 Apr 2018 16:10:06 +0200
Subject: [PATCH 1/2] Mentioned the new feature to pass custom HTTP headers
 when submiting forms

---
 testing.rst | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/testing.rst b/testing.rst
index f94f6276e7e..97b87cdb960 100644
--- a/testing.rst
+++ b/testing.rst
@@ -749,6 +749,16 @@ their type::
     PHP format (it converts the keys with square brackets notation - e.g.
     ``my_form[subject]`` - to PHP arrays).
 
+.. tip::
+
+    The ``submit()`` method defines a third optional argument to add custom
+    HTTP headers when submitting the form::
+
+        $client->submit($form, array(), array('Accept-Language' => 'es'));
+
+    .. versionadded:: 4.1
+        The feature to add custom HTTP headers was introduced in Symfony 4.1.
+
 Adding and Removing Forms to a Collection
 .........................................
 

From 6b3fdd82818d392e92def0e8f9c416dc72e709a8 Mon Sep 17 00:00:00 2001
From: Javier Eguiluz <javier.eguiluz@gmail.com>
Date: Mon, 23 Apr 2018 16:28:32 +0200
Subject: [PATCH 2/2] Fixed the format of the server HTTP header

---
 testing.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/testing.rst b/testing.rst
index 97b87cdb960..e6f33ff4b3e 100644
--- a/testing.rst
+++ b/testing.rst
@@ -754,7 +754,7 @@ their type::
     The ``submit()`` method defines a third optional argument to add custom
     HTTP headers when submitting the form::
 
-        $client->submit($form, array(), array('Accept-Language' => 'es'));
+        $client->submit($form, array(), array('HTTP_ACCEPT_LANGUAGE' => 'es'));
 
     .. versionadded:: 4.1
         The feature to add custom HTTP headers was introduced in Symfony 4.1.