pypy/module/_io/test/test_bufferedio.py::AppTestBufferedReaderWithThreads::()::test_peek

self = <pypy.interpreter.typedef.W_ObjectObjectUserDictWeakrefable object at 0x0000000143c98020>

    def test_peek(self):
            import _io
>           raw = _io.FileIO(self.tmpfile)
E           (application-level) LookupError: unknown encoding: utf-8

[/Users/matti/build-worker-arm64/own-macos-arm64/build/pypy/module/_io/test/test_bufferedio.py:136]:3: LookupError

builder: own-macos-arm64 build #1363+

test: pypy/module/_io/test/test_bufferedio.py::AppTestBufferedReaderWithThreads::()::test_peek