diff --git a/homeassistant/util/aiohttp.py b/homeassistant/util/aiohttp.py
index aad9771d963..5b6774a08a5 100644
--- a/homeassistant/util/aiohttp.py
+++ b/homeassistant/util/aiohttp.py
@@ -28,6 +28,14 @@ class MockStreamReader:
         return self._content.read(byte_count)
 
 
+class MockStreamReaderChunked(MockStreamReader):
+    """Mock a stream reader with simulated chunked data."""
+
+    async def readchunk(self) -> tuple[bytes, bool]:
+        """Read bytes."""
+        return (self._content.read(), False)
+
+
 class MockPayloadWriter:
     """Small mock to imitate payload writer."""
 
diff --git a/tests/components/cloud/test_backup.py b/tests/components/cloud/test_backup.py
index 8399e69ab09..e75cf72332c 100644
--- a/tests/components/cloud/test_backup.py
+++ b/tests/components/cloud/test_backup.py
@@ -24,20 +24,12 @@ from homeassistant.core import HomeAssistant
 from homeassistant.helpers.backup import async_initialize_backup
 from homeassistant.helpers.dispatcher import async_dispatcher_send
 from homeassistant.setup import async_setup_component
-from homeassistant.util.aiohttp import MockStreamReader
+from homeassistant.util.aiohttp import MockStreamReaderChunked
 
 from tests.test_util.aiohttp import AiohttpClientMocker
 from tests.typing import ClientSessionGenerator, MagicMock, WebSocketGenerator
 
 
-class MockStreamReaderChunked(MockStreamReader):
-    """Mock a stream reader with simulated chunked data."""
-
-    async def readchunk(self) -> tuple[bytes, bool]:
-        """Read bytes."""
-        return (self._content.read(), False)
-
-
 @pytest.fixture(autouse=True)
 async def setup_integration(
     hass: HomeAssistant,
diff --git a/tests/components/immich/__init__.py b/tests/components/immich/__init__.py
index 3a48c2cd725..604ab84d68d 100644
--- a/tests/components/immich/__init__.py
+++ b/tests/components/immich/__init__.py
@@ -1,19 +1,10 @@
 """Tests for the Immich integration."""
 
 from homeassistant.core import HomeAssistant
-from homeassistant.util.aiohttp import MockStreamReader
 
 from tests.common import MockConfigEntry
 
 
-class MockStreamReaderChunked(MockStreamReader):
-    """Mock a stream reader with simulated chunked data."""
-
-    async def readchunk(self) -> tuple[bytes, bool]:
-        """Read bytes."""
-        return (self._content.read(), False)
-
-
 async def setup_integration(hass: HomeAssistant, config_entry: MockConfigEntry) -> None:
     """Fixture for setting up the component."""
     config_entry.add_to_hass(hass)
diff --git a/tests/components/immich/conftest.py b/tests/components/immich/conftest.py
index 5a957870f07..1b9a7df8df7 100644
--- a/tests/components/immich/conftest.py
+++ b/tests/components/immich/conftest.py
@@ -23,8 +23,8 @@ from homeassistant.const import (
 )
 from homeassistant.core import HomeAssistant
 from homeassistant.setup import async_setup_component
+from homeassistant.util.aiohttp import MockStreamReaderChunked
 
-from . import MockStreamReaderChunked
 from .const import MOCK_ALBUM_WITH_ASSETS, MOCK_ALBUM_WITHOUT_ASSETS
 
 from tests.common import MockConfigEntry
diff --git a/tests/components/immich/test_media_source.py b/tests/components/immich/test_media_source.py
index ae7201f5e70..c8da8d94eeb 100644
--- a/tests/components/immich/test_media_source.py
+++ b/tests/components/immich/test_media_source.py
@@ -23,9 +23,9 @@ from homeassistant.components.media_source import (
 )
 from homeassistant.core import HomeAssistant
 from homeassistant.setup import async_setup_component
-from homeassistant.util.aiohttp import MockRequest
+from homeassistant.util.aiohttp import MockRequest, MockStreamReaderChunked
 
-from . import MockStreamReaderChunked, setup_integration
+from . import setup_integration
 from .const import MOCK_ALBUM_WITHOUT_ASSETS
 
 from tests.common import MockConfigEntry
diff --git a/tests/components/synology_dsm/test_backup.py b/tests/components/synology_dsm/test_backup.py
index db0062b45bf..5d54377c202 100644
--- a/tests/components/synology_dsm/test_backup.py
+++ b/tests/components/synology_dsm/test_backup.py
@@ -34,7 +34,7 @@ from homeassistant.const import (
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.backup import async_initialize_backup
 from homeassistant.setup import async_setup_component
-from homeassistant.util.aiohttp import MockStreamReader
+from homeassistant.util.aiohttp import MockStreamReader, MockStreamReaderChunked
 
 from .common import mock_dsm_information
 from .consts import HOST, MACS, PASSWORD, PORT, USE_SSL, USERNAME
@@ -45,14 +45,6 @@ from tests.typing import ClientSessionGenerator, WebSocketGenerator
 BASE_FILENAME = "Automatic_backup_2025.2.0.dev0_2025-01-09_20.14_35457323"
 
 
-class MockStreamReaderChunked(MockStreamReader):
-    """Mock a stream reader with simulated chunked data."""
-
-    async def readchunk(self) -> tuple[bytes, bool]:
-        """Read bytes."""
-        return (self._content.read(), False)
-
-
 async def _mock_download_file(path: str, filename: str) -> MockStreamReader:
     if filename == f"{BASE_FILENAME}_meta.json":
         return MockStreamReader(