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-rw-r--r--Lib/test/support.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/test/support.py b/Lib/test/support.py
index 54e0599..9bb4f36 100644
--- a/Lib/test/support.py
+++ b/Lib/test/support.py
@@ -408,7 +408,7 @@ else:
b'\xff'.decode(TESTFN_ENCODING)
except UnicodeDecodeError:
# 0xff will be encoded using the surrogate character u+DCFF
- TESTFN_UNENCODEABLE = TESTFN
+ TESTFN_UNENCODEABLE = TESTFN \
+ b'-\xff'.decode(TESTFN_ENCODING, 'surrogateescape')
else:
# File system encoding (eg. ISO-8859-* encodings) can encode