also skip test_device_encoding when stdin isn't a tty
diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py
index 5959d1e..e0c59fd 100644
--- a/Lib/test/test_os.py
+++ b/Lib/test/test_os.py
@@ -1433,8 +1433,8 @@
# Return None when an fd doesn't actually exist.
self.assertIsNone(os.device_encoding(123456))
- @unittest.skipUnless(sys.platform.startswith('win') or
- (hasattr(locale, 'nl_langinfo') and hasattr(locale, 'CODESET')),
+ @unittest.skipUnless(os.isatty(0) and (sys.platform.startswith('win') or
+ (hasattr(locale, 'nl_langinfo') and hasattr(locale, 'CODESET'))),
'test requires either Windows or nl_langinfo(CODESET)')
def test_device_encoding(self):
encoding = os.device_encoding(0)