diff --git a/tests/unit/objects/__init__.py b/tests/unit/objects/__init__.py
deleted file mode 100644
index e69de29bb..000000000
diff --git a/tests/unit/objects/test_cache.py b/tests/unit/objects/test_cache.py
deleted file mode 100644
index 93827a416..000000000
--- a/tests/unit/objects/test_cache.py
+++ /dev/null
@@ -1,48 +0,0 @@
-import pickle
-from typing import Any
-
-import pytest
-
-from dvc_objects.cache import Cache, DiskError
-
-
-def set_value(cache: Cache, key: str, value: Any) -> Any:
-    cache[key] = value
-    return cache[key]
-
-
-@pytest.mark.parametrize("disk_type", [None, "test"])
-def test_pickle_protocol_error(tmp_path, disk_type):
-    directory = tmp_path / "test"
-    cache = Cache(
-        str(directory),
-        disk_pickle_protocol=pickle.HIGHEST_PROTOCOL + 1,
-        type=disk_type,
-    )
-    with pytest.raises(DiskError) as exc, cache as cache:
-        set_value(cache, "key", ("value1", "value2"))
-    assert exc.value.directory == str(directory)
-    assert exc.value.type == "test"
-    assert f"Could not open disk 'test' in {directory}" == str(exc.value)
-
-
-@pytest.mark.parametrize(
-    "proto_a, proto_b",
-    [
-        (pickle.HIGHEST_PROTOCOL - 1, pickle.HIGHEST_PROTOCOL),
-        (pickle.HIGHEST_PROTOCOL, pickle.HIGHEST_PROTOCOL - 1),
-    ],
-)
-def test_pickle_backwards_compat(tmp_path, proto_a, proto_b):
-    with Cache(
-        directory=str(tmp_path / "test"),
-        disk_pickle_protocol=proto_a,
-    ) as cache:
-        set_value(cache, "key", ("value1", "value2"))
-    with Cache(
-        directory=str(tmp_path / "test"),
-        disk_pickle_protocol=proto_b,
-    ) as cache:
-        assert ("value1", "value2") == cache["key"]
-        set_value(cache, "key", ("value3", "value4"))
-        assert ("value3", "value4") == cache["key"]
diff --git a/tests/unit/objects/test_hash.py b/tests/unit/objects/test_hash.py
deleted file mode 100644
index 682f9c8dd..000000000
--- a/tests/unit/objects/test_hash.py
+++ /dev/null
@@ -1,19 +0,0 @@
-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
deleted file mode 100644
index 29e10de89..000000000
--- a/tests/unit/objects/test_hash_stream.py
+++ /dev/null
@@ -1,72 +0,0 @@
-import pytest
-
-from dvc_objects.fs import LocalFileSystem
-from dvc_objects.hash import HashStreamFile, file_md5
-from dvc_objects.istextfile import DEFAULT_CHUNK_SIZE, istextfile
-
-
-def test_hashed_stream_reader(tmp_path):
-    foo = tmp_path / "foo"
-    foo.write_bytes(b"foo")
-
-    with open(foo, "rb") as fobj:
-        stream_reader = HashStreamFile(fobj)
-
-        assert stream_reader.readable()
-        assert not stream_reader.seekable()
-
-        assert stream_reader.read(2) == b"fo"
-        assert stream_reader.tell() == 2
-
-        assert stream_reader.read(1) == b"o"
-        assert stream_reader.tell() == 3
-
-    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_path):
-    foo = tmp_path / "foo"
-    foo.write_bytes(b"foo \x00" * 16)
-
-    actual_size = len(foo.read_bytes())
-    with open(foo, "rb") as fobj:
-        stream_reader = HashStreamFile(fobj)
-
-        total_read = 0
-        while True:
-            chunk = stream_reader.read(16)
-            total_read += len(chunk)
-            assert stream_reader.tell() == total_read
-            if not chunk:
-                break
-
-        assert stream_reader.tell() == actual_size == total_read
-
-    hex_digest = file_md5(str(foo), LocalFileSystem())
-    assert not stream_reader.is_text
-    assert hex_digest == stream_reader.hash_value
-
-
-@pytest.mark.parametrize(
-    "contents",
-    [b"x" * DEFAULT_CHUNK_SIZE + b"\x00", b"clean", b"not clean \x00"],
-)
-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
-
-    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(str(data), local_fs)
-
-    assert stream_reader.is_text is istextfile(str(data), local_fs)
-    assert stream_reader.hash_value == hex_digest