-- This patch adds tests/fixtures/fsspec.py which is missing from the PyPI source distribution.
-- The file is taken from the GitHub repository at the same version tag.
-- Without this file, the test suite cannot be run.
--- /dev/null
+++ tests/fixtures/fsspec.py
@@ -0,0 +1,113 @@
+import posixpath
+from pathlib import Path
+from unittest.mock import patch
+
+import pytest
+from fsspec.implementations.local import AbstractFileSystem, LocalFileSystem, stringify_path
+from fsspec.registry import _registry as _fsspec_registry
+
+
+class MockFileSystem(AbstractFileSystem):
+    protocol = "mock"
+
+    def __init__(self, *args, local_root_dir, **kwargs):
+        super().__init__()
+        self._fs = LocalFileSystem(*args, **kwargs)
+        self.local_root_dir = Path(local_root_dir).resolve().as_posix() + "/"
+
+    def mkdir(self, path, *args, **kwargs):
+        path = posixpath.join(self.local_root_dir, self._strip_protocol(path))
+        return self._fs.mkdir(path, *args, **kwargs)
+
+    def makedirs(self, path, *args, **kwargs):
+        path = posixpath.join(self.local_root_dir, self._strip_protocol(path))
+        return self._fs.makedirs(path, *args, **kwargs)
+
+    def rmdir(self, path):
+        path = posixpath.join(self.local_root_dir, self._strip_protocol(path))
+        return self._fs.rmdir(path)
+
+    def ls(self, path, detail=True, *args, **kwargs):
+        path = posixpath.join(self.local_root_dir, self._strip_protocol(path))
+        out = self._fs.ls(path, detail=detail, *args, **kwargs)
+        if detail:
+            return [{**info, "name": info["name"][len(self.local_root_dir) :]} for info in out]
+        else:
+            return [name[len(self.local_root_dir) :] for name in out]
+
+    def info(self, path, *args, **kwargs):
+        path = posixpath.join(self.local_root_dir, self._strip_protocol(path))
+        out = dict(self._fs.info(path, *args, **kwargs))
+        out["name"] = out["name"][len(self.local_root_dir) :]
+        return out
+
+    def cp_file(self, path1, path2, *args, **kwargs):
+        path1 = posixpath.join(self.local_root_dir, self._strip_protocol(path1))
+        path2 = posixpath.join(self.local_root_dir, self._strip_protocol(path2))
+        return self._fs.cp_file(path1, path2, *args, **kwargs)
+
+    def rm_file(self, path, *args, **kwargs):
+        path = posixpath.join(self.local_root_dir, self._strip_protocol(path))
+        return self._fs.rm_file(path, *args, **kwargs)
+
+    def rm(self, path, *args, **kwargs):
+        path = posixpath.join(self.local_root_dir, self._strip_protocol(path))
+        return self._fs.rm(path, *args, **kwargs)
+
+    def _open(self, path, *args, **kwargs):
+        path = posixpath.join(self.local_root_dir, self._strip_protocol(path))
+        return self._fs._open(path, *args, **kwargs)
+
+    def created(self, path):
+        path = posixpath.join(self.local_root_dir, self._strip_protocol(path))
+        return self._fs.created(path)
+
+    def modified(self, path):
+        path = posixpath.join(self.local_root_dir, self._strip_protocol(path))
+        return self._fs.modified(path)
+
+    @classmethod
+    def _strip_protocol(cls, path):
+        path = stringify_path(path)
+        if path.startswith("mock://"):
+            path = path[7:]
+        return path
+
+
+class TmpDirFileSystem(MockFileSystem):
+    protocol = "tmp"
+    tmp_dir = None
+
+    def __init__(self, *args, **kwargs):
+        assert self.tmp_dir is not None, "TmpDirFileSystem.tmp_dir is not set"
+        super().__init__(*args, **kwargs, local_root_dir=self.tmp_dir, auto_mkdir=True)
+
+    @classmethod
+    def _strip_protocol(cls, path):
+        path = stringify_path(path)
+        if path.startswith("tmp://"):
+            path = path[6:]
+        return path
+
+
+@pytest.fixture
+def mock_fsspec():
+    _fsspec_registry["mock"] = MockFileSystem
+    _fsspec_registry["tmp"] = TmpDirFileSystem
+    yield
+    del _fsspec_registry["mock"]
+    del _fsspec_registry["tmp"]
+
+
+@pytest.fixture
+def mockfs(tmp_path_factory, mock_fsspec):
+    local_fs_dir = tmp_path_factory.mktemp("mockfs")
+    return MockFileSystem(local_root_dir=local_fs_dir, auto_mkdir=True)
+
+
+@pytest.fixture
+def tmpfs(tmp_path_factory, mock_fsspec):
+    tmp_fs_dir = tmp_path_factory.mktemp("tmpfs")
+    with patch.object(TmpDirFileSystem, "tmp_dir", tmp_fs_dir):
+        yield TmpDirFileSystem()
+        TmpDirFileSystem.clear_instance_cache()