Issue #13415: Skip test_os.test_unset_error on FreeBSD and OS X.
diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py
index 876469b..4da1f1d 100644
--- a/Lib/test/test_os.py
+++ b/Lib/test/test_os.py
@@ -423,6 +423,10 @@
value_str = value.decode(sys.getfilesystemencoding(), 'surrogateescape')
self.assertEqual(os.environ['bytes'], value_str)
+ # On FreeBSD < 7 and OS X < 10.6, unsetenv() doesn't return a value (issue
+ # #13415).
+ @unittest.skipIf(sys.platform.startswith(('freebsd', 'darwin')),
+ "due to known OS bug: see issue #13415")
def test_unset_error(self):
if sys.platform == "win32":
# an environment variable is limited to 32,767 characters