From 8e5d9bcaaee6bf5bb55b927331f470a66352f04e Mon Sep 17 00:00:00 2001
From: ferror <zmalcherczyk@gmail.com>
Date: Mon, 5 Apr 2021 16:46:16 +0200
Subject: [PATCH] Every custom header in testing client must have HTTP prefix

---
 testing.rst | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/testing.rst b/testing.rst
index 130ed0ab2ae..d6fa9774a1b 100644
--- a/testing.rst
+++ b/testing.rst
@@ -1029,6 +1029,10 @@ You can also override HTTP headers on a per request basis::
         'HTTP_USER_AGENT' => 'MySuperBrowser/1.0',
     ]);
 
+.. caution::
+
+    Every custom header must have `HTTP_` prefix.
+
 .. tip::
 
     The test client is available as a service in the container in the ``test``