From 9b6cef0f5dcb309096a68fdd04158e0e1313e8ec Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?B=C3=A9n=C3=A9dikt=20Tran?=
 <10796600+picnixz@users.noreply.github.com>
Date: Sun, 16 Mar 2025 15:39:30 +0100
Subject: gh-131254: ensure that `BROWSER` is not set for `test_webbrowser` on
 macOS (#131276)

---
 Lib/test/test_webbrowser.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Lib/test/test_webbrowser.py b/Lib/test/test_webbrowser.py
index 870ddd7..4c3ea1c 100644
--- a/Lib/test/test_webbrowser.py
+++ b/Lib/test/test_webbrowser.py
@@ -321,7 +321,13 @@ class MockPopenPipe:
 @unittest.skipUnless(sys.platform == "darwin", "macOS specific test")
 @requires_subprocess()
 class MacOSXOSAScriptTest(unittest.TestCase):
+
     def setUp(self):
+        # Ensure that 'BROWSER' is not set to 'open' or something else.
+        # See: https://github.com/python/cpython/issues/131254.
+        env = self.enterContext(os_helper.EnvironmentVarGuard())
+        env.unset("BROWSER")
+
         support.patch(self, os, "popen", self.mock_popen)
         self.browser = webbrowser.MacOSXOSAScript("default")
 
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