diff --git a/tests/func/objects/__init__.py b/tests/func/data/__init__.py
similarity index 100%
rename from tests/func/objects/__init__.py
rename to tests/func/data/__init__.py
diff --git a/tests/func/objects/db/__init__.py b/tests/func/data/db/__init__.py
similarity index 100%
rename from tests/func/objects/db/__init__.py
rename to tests/func/data/db/__init__.py
diff --git a/tests/func/objects/db/test_index.py b/tests/func/data/db/test_index.py
similarity index 100%
rename from tests/func/objects/db/test_index.py
rename to tests/func/data/db/test_index.py
diff --git a/tests/func/objects/test_hash.py b/tests/func/objects/test_hash.py
deleted file mode 100644
index 10eae3ff4..000000000
--- a/tests/func/objects/test_hash.py
+++ /dev/null
@@ -1,16 +0,0 @@
-from dvc.fs import LocalFileSystem
-from dvc.objects.hash import file_md5
-
-
-def test_file_md5(tmp_dir):
-    tmp_dir.gen("foo", "foo content")
-
-    fs = LocalFileSystem()
-    assert file_md5("foo", fs) == file_md5("foo", fs)
-
-
-def test_file_md5_crlf(tmp_dir):
-    fs = LocalFileSystem()
-    tmp_dir.gen("cr", b"a\nb\nc")
-    tmp_dir.gen("crlf", b"a\r\nb\r\nc")
-    assert file_md5("cr", fs) == file_md5("crlf", fs)
diff --git a/tests/unit/objects/db/__init__.py b/tests/unit/data/__init__.py
similarity index 100%
rename from tests/unit/objects/db/__init__.py
rename to tests/unit/data/__init__.py
diff --git a/tests/unit/data/db/__init__.py b/tests/unit/data/db/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/tests/unit/objects/db/test_local.py b/tests/unit/data/db/test_local.py
similarity index 100%
rename from tests/unit/objects/db/test_local.py
rename to tests/unit/data/db/test_local.py
diff --git a/tests/unit/objects/test_tree.py b/tests/unit/data/test_tree.py
similarity index 100%
rename from tests/unit/objects/test_tree.py
rename to tests/unit/data/test_tree.py
diff --git a/tests/unit/objects/test_cache.py b/tests/unit/objects/test_cache.py
index 5bcb0bd7c..2a43711c7 100644
--- a/tests/unit/objects/test_cache.py
+++ b/tests/unit/objects/test_cache.py
@@ -12,10 +12,10 @@ def set_value(cache: Cache, key: str, value: Any) -> Any:
 
 
 @pytest.mark.parametrize("disk_type", [None, "test"])
-def test_pickle_protocol_error(tmp_dir, disk_type):
-    directory = tmp_dir / "test"
+def test_pickle_protocol_error(tmp_path, disk_type):
+    directory = tmp_path / "test"
     cache = Cache(
-        directory,
+        str(directory),
         disk_pickle_protocol=pickle.HIGHEST_PROTOCOL + 1,
         type=disk_type,
     )
@@ -33,14 +33,14 @@ def test_pickle_protocol_error(tmp_dir, disk_type):
         (pickle.HIGHEST_PROTOCOL, pickle.HIGHEST_PROTOCOL - 1),
     ],
 )
-def test_pickle_backwards_compat(tmp_dir, proto_a, proto_b):
+def test_pickle_backwards_compat(tmp_path, proto_a, proto_b):
     with Cache(
-        directory=(tmp_dir / "test"),
+        directory=str(tmp_path / "test"),
         disk_pickle_protocol=proto_a,
     ) as cache:
         set_value(cache, "key", ("value1", "value2"))
     with Cache(
-        directory=(tmp_dir / "test"),
+        directory=str(tmp_path / "test"),
         disk_pickle_protocol=proto_b,
     ) as cache:
         assert ("value1", "value2") == cache["key"]
diff --git a/tests/unit/objects/test_hash.py b/tests/unit/objects/test_hash.py
new file mode 100644
index 000000000..cc3bf9c26
--- /dev/null
+++ b/tests/unit/objects/test_hash.py
@@ -0,0 +1,19 @@
+from dvc.objects.fs import LocalFileSystem
+from dvc.objects.hash import file_md5
+
+
+def test_file_md5(tmp_path):
+    foo = tmp_path / "foo"
+    foo.write_text("foo content")
+
+    fs = LocalFileSystem()
+    assert file_md5(str(foo), fs) == file_md5(str(foo), fs)
+
+
+def test_file_md5_crlf(tmp_path):
+    fs = LocalFileSystem()
+    cr = tmp_path / "cr"
+    crlf = tmp_path / "crlf"
+    cr.write_bytes(b"a\nb\nc")
+    crlf.write_bytes(b"a\r\nb\r\nc")
+    assert file_md5(str(cr), fs) == file_md5(str(crlf), fs)
diff --git a/tests/unit/objects/test_hash_stream.py b/tests/unit/objects/test_hash_stream.py
index 217906dfb..0b80a23ea 100644
--- a/tests/unit/objects/test_hash_stream.py
+++ b/tests/unit/objects/test_hash_stream.py
@@ -5,10 +5,10 @@ from dvc.objects.hash import HashStreamFile, file_md5
 from dvc.objects.istextfile import DEFAULT_CHUNK_SIZE, istextfile
 
 
-def test_hashed_stream_reader(tmp_dir):
-    tmp_dir.gen({"foo": "foo"})
+def test_hashed_stream_reader(tmp_path):
+    foo = tmp_path / "foo"
+    foo.write_bytes(b"foo")
 
-    foo = tmp_dir / "foo"
     with open(foo, "rb") as fobj:
         stream_reader = HashStreamFile(fobj)
 
@@ -21,15 +21,14 @@ def test_hashed_stream_reader(tmp_dir):
         assert stream_reader.read(1) == b"o"
         assert stream_reader.tell() == 3
 
-    hex_digest = file_md5(foo, LocalFileSystem())
+    hex_digest = file_md5(str(foo), LocalFileSystem())
     assert stream_reader.is_text
     assert hex_digest == stream_reader.hash_value
 
 
-def test_hashed_stream_reader_as_chunks(tmp_dir):
-    tmp_dir.gen({"foo": b"foo \x00" * 16})
-
-    foo = tmp_dir / "foo"
+def test_hashed_stream_reader_as_chunks(tmp_path):
+    foo = tmp_path / "foo"
+    foo.write_bytes(b"foo \x00" * 16)
 
     actual_size = len(foo.read_bytes())
     with open(foo, "rb") as fobj:
@@ -45,7 +44,7 @@ def test_hashed_stream_reader_as_chunks(tmp_dir):
 
         assert stream_reader.tell() == actual_size == total_read
 
-    hex_digest = file_md5(foo, LocalFileSystem())
+    hex_digest = file_md5(str(foo), LocalFileSystem())
     assert not stream_reader.is_text
     assert hex_digest == stream_reader.hash_value
 
@@ -54,20 +53,20 @@ def test_hashed_stream_reader_as_chunks(tmp_dir):
     "contents",
     [b"x" * DEFAULT_CHUNK_SIZE + b"\x00", b"clean", b"not clean \x00"],
 )
-def test_hashed_stream_reader_compatibility(tmp_dir, contents):
+def test_hashed_stream_reader_compatibility(tmp_path, contents):
     # Always read more than the DEFAULT_CHUNK_SIZE (512 bytes).
     # This imitates the read actions performed by upload_fobj.
     chunk_size = DEFAULT_CHUNK_SIZE * 2
 
-    tmp_dir.gen("data", contents)
-    data = tmp_dir / "data"
+    data = tmp_path / "data"
+    data.write_bytes(contents)
 
     with open(data, "rb") as fobj:
         stream_reader = HashStreamFile(fobj)
         stream_reader.read(chunk_size)
 
     local_fs = LocalFileSystem()
-    hex_digest = file_md5(data, local_fs)
+    hex_digest = file_md5(str(data), local_fs)
 
-    assert stream_reader.is_text is istextfile(data, local_fs)
+    assert stream_reader.is_text is istextfile(str(data), local_fs)
     assert stream_reader.hash_value == hex_digest