From 7b7d21a47a96f73af52dcc26fff184f8103c4551 Mon Sep 17 00:00:00 2001
From: Victor Stinner <vstinner@python.org>
Date: Mon, 5 Oct 2020 18:24:00 +0200
Subject: [PATCH] bpo-41939: Fix test_site.test_license_exists_at_url()
 (GH-22559)

Call urllib.request.urlcleanup() to reset the global
urllib.request._opener.
(cherry picked from commit 1fce240d6c4b2b2cc17a86e88c65169e15b9feeb)

Co-authored-by: Victor Stinner <vstinner@python.org>
---
 Lib/test/test_site.py                                          | 2 ++
 .../NEWS.d/next/Tests/2020-10-05-09-37-43.bpo-41939.P4OlbA.rst | 3 +++
 2 files changed, 5 insertions(+)
 create mode 100644 Misc/NEWS.d/next/Tests/2020-10-05-09-37-43.bpo-41939.P4OlbA.rst

diff --git a/Lib/test/test_site.py b/Lib/test/test_site.py
index 923f35efe2ede6..ece6a072806347 100644
--- a/Lib/test/test_site.py
+++ b/Lib/test/test_site.py
@@ -509,6 +509,8 @@ def test_license_exists_at_url(self):
         # string displayed by license in the absence of a LICENSE file.
         url = license._Printer__data.split()[1]
         req = urllib.request.Request(url, method='HEAD')
+        # Reset global urllib.request._opener
+        self.addCleanup(urllib.request.urlcleanup)
         try:
             with socket_helper.transient_internet(url):
                 with urllib.request.urlopen(req) as data:
diff --git a/Misc/NEWS.d/next/Tests/2020-10-05-09-37-43.bpo-41939.P4OlbA.rst b/Misc/NEWS.d/next/Tests/2020-10-05-09-37-43.bpo-41939.P4OlbA.rst
new file mode 100644
index 00000000000000..e58ad2616da1ba
--- /dev/null
+++ b/Misc/NEWS.d/next/Tests/2020-10-05-09-37-43.bpo-41939.P4OlbA.rst
@@ -0,0 +1,3 @@
+Fix test_site.test_license_exists_at_url(): call
+``urllib.request.urlcleanup()`` to reset the global
+``urllib.request._opener``. Patch by Victor Stinner.