1 files changed, 14 insertions, 4 deletions
diff --git a/Lib/test/test_argparse.py b/Lib/test/test_argparse.py
index f0802a5..c0c7cb0 100644
--- a/Lib/test/test_argparse.py
+++ b/Lib/test/test_argparse.py
@@ -1459,6 +1459,16 @@ class TestFileTypeRepr(TestCase):
         type = argparse.FileType('r', 1, errors='replace')
         self.assertEqual("FileType('r', 1, errors='replace')", repr(type))
 
+class StdStreamComparer:
+    def __init__(self, attr):
+        self.attr = attr
+
+    def __eq__(self, other):
+        return other == getattr(sys, self.attr)
+
+eq_stdin = StdStreamComparer('stdin')
+eq_stdout = StdStreamComparer('stdout')
+eq_stderr = StdStreamComparer('stderr')
 
 class RFile(object):
     seen = {}
@@ -1497,7 +1507,7 @@ class TestFileTypeR(TempDirMixin, ParserTestCase):
         ('foo', NS(x=None, spam=RFile('foo'))),
         ('-x foo bar', NS(x=RFile('foo'), spam=RFile('bar'))),
         ('bar -x foo', NS(x=RFile('foo'), spam=RFile('bar'))),
-        ('-x - -', NS(x=sys.stdin, spam=sys.stdin)),
+        ('-x - -', NS(x=eq_stdin, spam=eq_stdin)),
         ('readonly', NS(x=None, spam=RFile('readonly'))),
     ]
 
@@ -1537,7 +1547,7 @@ class TestFileTypeRB(TempDirMixin, ParserTestCase):
         ('foo', NS(x=None, spam=RFile('foo'))),
         ('-x foo bar', NS(x=RFile('foo'), spam=RFile('bar'))),
         ('bar -x foo', NS(x=RFile('foo'), spam=RFile('bar'))),
-        ('-x - -', NS(x=sys.stdin, spam=sys.stdin)),
+        ('-x - -', NS(x=eq_stdin, spam=eq_stdin)),
     ]
 
 
@@ -1576,7 +1586,7 @@ class TestFileTypeW(TempDirMixin, ParserTestCase):
         ('foo', NS(x=None, spam=WFile('foo'))),
         ('-x foo bar', NS(x=WFile('foo'), spam=WFile('bar'))),
         ('bar -x foo', NS(x=WFile('foo'), spam=WFile('bar'))),
-        ('-x - -', NS(x=sys.stdout, spam=sys.stdout)),
+        ('-x - -', NS(x=eq_stdout, spam=eq_stdout)),
     ]
 
 
@@ -1591,7 +1601,7 @@ class TestFileTypeWB(TempDirMixin, ParserTestCase):
         ('foo', NS(x=None, spam=WFile('foo'))),
         ('-x foo bar', NS(x=WFile('foo'), spam=WFile('bar'))),
         ('bar -x foo', NS(x=WFile('foo'), spam=WFile('bar'))),
-        ('-x - -', NS(x=sys.stdout, spam=sys.stdout)),
+        ('-x - -', NS(x=eq_stdout, spam=eq_stdout)),
     ]