diff --git a/tests/test_requests.py b/tests/test_requests.py
index 267003d4..b8190cfb 100755
--- a/tests/test_requests.py
+++ b/tests/test_requests.py
@@ -65,6 +65,8 @@ class TestRequests:
         requests.put
         requests.patch
         requests.post
+        # Not really an entry point, but people rely on it.
+        from requests.packages.urllib3.poolmanager import PoolManager
 
     @pytest.mark.parametrize(
         'exception, url', (