diff --git a/src/Symfony/Component/BrowserKit/Tests/HttpBrowserTest.php b/src/Symfony/Component/BrowserKit/Tests/HttpBrowserTest.php
index 4cd44aff70..8125d1a77c 100644
--- a/src/Symfony/Component/BrowserKit/Tests/HttpBrowserTest.php
+++ b/src/Symfony/Component/BrowserKit/Tests/HttpBrowserTest.php
@@ -63,6 +63,18 @@ class HttpBrowserTest extends AbstractBrowserTest
             ['POST', 'http://example.com/', [], [], ['CONTENT_TYPE' => 'application/json'], '["content"]'],
             ['POST', 'http://example.com/', ['headers' => $defaultHeaders + ['content-type' => 'application/json'], 'body' => '["content"]', 'max_redirects' => 0]],
         ];
+        yield 'custom header with HTTP_ prefix' => [
+            ['PUT', 'http://example.com/', [], [], ['HTTP_CONTENT_TYPE' => 'application/json'], '["content"]'],
+            ['PUT', 'http://example.com/', ['headers' => $defaultHeaders + ['content-type' => 'application/json'], 'body' => '["content"]', 'max_redirects' => 0]],
+        ];
+        yield 'modify notation of custom header with HTTP_ prefix' => [
+            ['PUT', 'http://example.com/', [], [], ['HTTP_Content-Type' => 'application/json'], '["content"]'],
+            ['PUT', 'http://example.com/', ['headers' => $defaultHeaders + ['content-type' => 'application/json'], 'body' => '["content"]', 'max_redirects' => 0]],
+        ];
+        yield 'modify notation of custom header' => [
+            ['PUT', 'http://example.com/', [], [], ['Content-Type' => 'application/json'], '["content"]'],
+            ['PUT', 'http://example.com/', ['headers' => $defaultHeaders + ['content-type' => 'application/json'], 'body' => '["content"]', 'max_redirects' => 0]],
+        ];
     }
 
     public function testMultiPartRequestWithSingleFile()