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-rw-r--r--Lib/test/support.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/Lib/test/support.py b/Lib/test/support.py
index 871154a..963a2a7 100644
--- a/Lib/test/support.py
+++ b/Lib/test/support.py
@@ -402,7 +402,8 @@ if os.name in ('nt', 'ce'):
'Unicode filename tests may not be effective'
% (TESTFN_UNENCODABLE, TESTFN_ENCODING))
TESTFN_UNENCODABLE = None
-else:
+elif sys.platform != 'darwin':
+ # Mac OS X denies unencodable filenames (invalid utf-8)
try:
# ascii and utf-8 cannot encode the byte 0xff
b'\xff'.decode(TESTFN_ENCODING)