diff -dupr a/pytest_httpbin/serve.py b/pytest_httpbin/serve.py
--- a/pytest_httpbin/serve.py	2019-02-11 20:54:14.000000000 +0100
+++ b/pytest_httpbin/serve.py	2019-11-22 15:50:17.407769297 +0100
@@ -116,6 +116,7 @@ class Server(object):
 
     def stop(self):
         self._server.shutdown()
+        self._server.socket.close()
 
     @property
     def url(self):
Only in b: pytest_httpbin.egg-info
Only in b/tests: __pycache__
diff -dupr a/tests/test_httpbin.py b/tests/test_httpbin.py
--- a/tests/test_httpbin.py	2019-02-11 20:54:14.000000000 +0100
+++ b/tests/test_httpbin.py	2019-11-22 15:59:53.955324547 +0100
@@ -1,3 +1,4 @@
+import sys
 import unittest
 import requests
 import pytest_httpbin
@@ -40,6 +41,8 @@ def test_httpbin_join(httpbin):
 def test_httpbin_str(httpbin):
     assert httpbin + '/foo' == httpbin.url + '/foo'
 
+@unittest.skipIf(hasattr(sys, 'pypy_version_info')
+                 and sys.hexversion >= 0x03000000, 'hangs on PyPy3')
 def test_chunked_encoding(httpbin_both):
     assert requests.get(httpbin_both.url + '/stream/20').status_code == 200
 
Only in b: .tox