backport r67325: make FileIO.mode always contain 'b'
diff --git a/Lib/test/test_fileio.py b/Lib/test/test_fileio.py
index cbc7165..c978779 100644
--- a/Lib/test/test_fileio.py
+++ b/Lib/test/test_fileio.py
@@ -50,7 +50,7 @@
# verify expected attributes exist
f = self.f
- self.assertEquals(f.mode, "w")
+ self.assertEquals(f.mode, "wb")
self.assertEquals(f.closed, False)
# verify the attributes are readonly
@@ -160,7 +160,7 @@
def testModeStrings(self):
# check invalid mode strings
- for mode in ("", "aU", "wU+", "rb", "rt"):
+ for mode in ("", "aU", "wU+", "rw", "rt"):
try:
f = _fileio._FileIO(TESTFN, mode)
except ValueError: