1 files changed, 7 insertions, 0 deletions
diff --git a/Lib/test/test_httpservers.py b/Lib/test/test_httpservers.py
index 85b5ec4..19d3d17 100644
--- a/Lib/test/test_httpservers.py
+++ b/Lib/test/test_httpservers.py
@@ -573,6 +573,13 @@ class BaseHTTPRequestHandlerTestCase(unittest.TestCase):
         self.assertEqual(result[0], b'HTTP/1.1 414 Request-URI Too Long\r\n')
         self.assertFalse(self.handler.get_called)
 
+    def test_header_length(self):
+        # Issue #6791: same for headers
+        result = self.send_typical_request(
+            b'GET / HTTP/1.1\r\nX-Foo: bar' + b'r' * 65537 + b'\r\n\r\n')
+        self.assertEqual(result[0], b'HTTP/1.1 400 Line too long\r\n')
+        self.assertFalse(self.handler.get_called)
+
 class SimpleHTTPRequestHandlerTestCase(unittest.TestCase):
     """ Test url parsing """
     def setUp(self):