1 files changed, 13 insertions, 0 deletions
diff --git a/Lib/test/test_httplib.py b/Lib/test/test_httplib.py
index 8955d45..fe8105e 100644
--- a/Lib/test/test_httplib.py
+++ b/Lib/test/test_httplib.py
@@ -2404,6 +2404,19 @@ class TunnelTests(TestCase):
         headers = self.conn.get_proxy_response_headers()
         self.assertIn(expected_header, headers.items())
 
+    def test_no_proxy_response_headers(self):
+        expected_header = ('X-Dummy', '1')
+        response_text = (
+            'HTTP/1.0 200 OK\r\n'
+            '{0}\r\n\r\n'.format(':'.join(expected_header))
+        )
+
+        self.conn._create_connection = self._create_connection(response_text)
+
+        self.conn.request('PUT', '/', '')
+        headers = self.conn.get_proxy_response_headers()
+        self.assertIsNone(headers)
+
     def test_tunnel_leak(self):
         sock = None