diff --git a/git/index/util.py b/git/index/util.py
@@ -41,7 +41,8 @@ class TemporaryFileSwap:

    def __init__(self, file_path: PathLike) -> None:
        self.file_path = file_path
-        fd, self.tmp_file_path = tempfile.mkstemp(prefix=self.file_path, dir="")
        os.close(fd)
        with contextlib.suppress(OSError):  # It may be that the source does not exist.
            os.replace(self.file_path, self.tmp_file_path)

diff --git a/test/test_blob_filter.py b/test/test_blob_filter.py
@@ -14,14 +14,15 @@
from git.types import PathLike


-# fmt: off
-@pytest.mark.parametrize('paths, path, expected_result', [
-    ((Path("foo"),), Path("foo"), True),
-    ((Path("foo"),), Path("foo/bar"), True),
-    ((Path("foo/bar"),), Path("foo"), False),
-    ((Path("foo"), Path("bar")), Path("foo"), True),
-])
-# fmt: on
def test_blob_filter(paths: Sequence[PathLike], path: PathLike, expected_result: bool) -> None:
    """Test the blob filter."""
    blob_filter = BlobFilter(paths)

diff --git a/test/test_index.py b/test/test_index.py
@@ -34,10 +34,11 @@
)
from git.index.fun import hook_path
from git.index.typ import BaseIndexEntry, IndexEntry
from git.objects import Blob
-from test.lib import TestBase, fixture, fixture_path, with_rw_directory, with_rw_repo
from git.util import Actor, hex_to_bin, rmtree
from gitdb.base import IStream

HOOKS_SHEBANG = "#!/usr/bin/env sh\n"

@@ -1087,3 +1088,25 @@ def test_index_add_pathlike(self, rw_repo):
        file.touch()

        rw_repo.index.add(file)