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-rw-r--r--Lib/test/test_io.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py
index f8a4938..656711f 100644
--- a/Lib/test/test_io.py
+++ b/Lib/test/test_io.py
@@ -305,7 +305,9 @@ class MemorySeekTestMixin:
class BytesIOTest(MemorySeekTestMixin, unittest.TestCase):
- buftype = bytes
+ @staticmethod
+ def buftype(s):
+ return s.encode("utf-8")
ioclass = io.BytesIO
EOF = b""