diff --git a/tests/components/androidtv/patchers.py b/tests/components/androidtv/patchers.py
index 90a13523ebe..1c32e1770e0 100644
--- a/tests/components/androidtv/patchers.py
+++ b/tests/components/androidtv/patchers.py
@@ -37,7 +37,7 @@ class AdbDeviceTcpAsyncFake:
         """Try to connect to a device."""
         raise NotImplementedError
 
-    async def shell(self, cmd, *args, **kwargs):
+    async def shell(self, cmd, *args, **kwargs) -> bytes | str | None:
         """Send an ADB shell command."""
         return None
 
diff --git a/tests/components/enigma2/conftest.py b/tests/components/enigma2/conftest.py
index f879fb327d7..0e4b4c24e26 100644
--- a/tests/components/enigma2/conftest.py
+++ b/tests/components/enigma2/conftest.py
@@ -78,7 +78,7 @@ class MockDevice:
                 }
             }
 
-    def get_version(self):
+    def get_version(self) -> str | None:
         """Return the version."""
         return None
 
diff --git a/tests/components/ipma/test_weather.py b/tests/components/ipma/test_weather.py
index b7ef1347ca5..997eb582083 100644
--- a/tests/components/ipma/test_weather.py
+++ b/tests/components/ipma/test_weather.py
@@ -4,6 +4,7 @@ import datetime
 from unittest.mock import patch
 
 from freezegun.api import FrozenDateTimeFactory
+from pyipma.observation import Observation
 import pytest
 from syrupy.assertion import SnapshotAssertion
 
@@ -43,7 +44,7 @@ TEST_CONFIG_HOURLY = {
 class MockBadLocation(MockLocation):
     """Mock Location with unresponsive api."""
 
-    async def observation(self, api):
+    async def observation(self, api) -> Observation | None:
         """Mock Observation."""
         return None
 
diff --git a/tests/components/modbus/conftest.py b/tests/components/modbus/conftest.py
index 067fb2d123d..6741504585a 100644
--- a/tests/components/modbus/conftest.py
+++ b/tests/components/modbus/conftest.py
@@ -61,7 +61,7 @@ def register_words_fixture():
 
 
 @pytest.fixture(name="config_addon")
-def config_addon_fixture():
+def config_addon_fixture() -> dict[str, Any] | None:
     """Add extra configuration items."""
     return None
 
diff --git a/tests/components/nest/test_api.py b/tests/components/nest/test_api.py
index fd07233fa8c..a13d4d3a337 100644
--- a/tests/components/nest/test_api.py
+++ b/tests/components/nest/test_api.py
@@ -18,7 +18,7 @@ from homeassistant.components.nest.const import API_URL, OAUTH2_TOKEN, SDM_SCOPE
 from homeassistant.core import HomeAssistant
 from homeassistant.util import dt as dt_util
 
-from .common import CLIENT_ID, CLIENT_SECRET, PROJECT_ID, PlatformSetup
+from .common import CLIENT_ID, CLIENT_SECRET, PROJECT_ID, FakeSubscriber, PlatformSetup
 from .conftest import FAKE_REFRESH_TOKEN, FAKE_TOKEN
 
 from tests.test_util.aiohttp import AiohttpClientMocker
@@ -27,7 +27,7 @@ FAKE_UPDATED_TOKEN = "fake-updated-token"
 
 
 @pytest.fixture
-def subscriber() -> None:
+def subscriber() -> FakeSubscriber | None:
     """Disable default subscriber since tests use their own patch."""
     return None
 
diff --git a/tests/components/nest/test_init.py b/tests/components/nest/test_init.py
index 2beed07a979..f3226c936fb 100644
--- a/tests/components/nest/test_init.py
+++ b/tests/components/nest/test_init.py
@@ -67,13 +67,15 @@ def warning_caplog(
 
 
 @pytest.fixture
-def subscriber_side_effect() -> None:
+def subscriber_side_effect() -> Any | None:
     """Fixture to inject failures into FakeSubscriber start."""
     return None
 
 
 @pytest.fixture
-def failing_subscriber(subscriber_side_effect: Any) -> YieldFixture[FakeSubscriber]:
+def failing_subscriber(
+    subscriber_side_effect: Any | None,
+) -> YieldFixture[FakeSubscriber]:
     """Fixture overriding default subscriber behavior to allow failure injection."""
     subscriber = FakeSubscriber()
     with patch(
diff --git a/tests/components/notify/test_legacy.py b/tests/components/notify/test_legacy.py
index d6478c358bf..b499486b312 100644
--- a/tests/components/notify/test_legacy.py
+++ b/tests/components/notify/test_legacy.py
@@ -226,7 +226,11 @@ async def test_invalid_service(
 ) -> None:
     """Test service setup with an invalid service object or platform."""
 
-    def get_service(hass, config, discovery_info=None):
+    def get_service(
+        hass: HomeAssistant,
+        config: ConfigType,
+        discovery_info: DiscoveryInfoType | None = None,
+    ) -> notify.BaseNotificationService | None:
         """Return None for an invalid notify service."""
         return None
 
diff --git a/tests/components/rainbird/test_config_flow.py b/tests/components/rainbird/test_config_flow.py
index 174bbdb3d48..87506ad656c 100644
--- a/tests/components/rainbird/test_config_flow.py
+++ b/tests/components/rainbird/test_config_flow.py
@@ -40,7 +40,7 @@ def mock_responses() -> list[AiohttpClientMockResponse]:
 
 
 @pytest.fixture(autouse=True)
-async def config_entry_data() -> None:
+async def config_entry_data() -> dict[str, Any] | None:
     """Fixture to disable config entry setup for exercising config flow."""
     return None