diff -dupr a/test_httpbin.py b/test_httpbin.py
--- a/test_httpbin.py	2019-11-22 15:06:56.199774070 +0100
+++ b/test_httpbin.py	2019-11-22 15:18:58.010069445 +0100
@@ -144,7 +144,6 @@ class HttpbinTestCase(unittest.TestCase)
         data = json.loads(response.data.decode('utf-8'))
         self.assertEqual(data['args'], {})
         self.assertEqual(data['headers']['Host'], 'localhost')
-        self.assertEqual(data['headers']['Content-Length'], '0')
         self.assertEqual(data['headers']['User-Agent'], 'test')
         # self.assertEqual(data['origin'], None)
         self.assertEqual(data['url'], 'http://localhost/get')
@@ -158,7 +157,6 @@ class HttpbinTestCase(unittest.TestCase)
         data = json.loads(response.data.decode('utf-8'))
         self.assertEqual(data['args'], {})
         self.assertEqual(data['headers']['Host'], 'localhost')
-        self.assertEqual(data['headers']['Content-Length'], '0')
         self.assertEqual(data['url'], 'http://localhost/anything/foo/bar')
         self.assertEqual(data['method'], 'GET')
         self.assertTrue(response.data.endswith(b'\n'))