diff --git a/tests/components/alexa/test_common.py b/tests/components/alexa/test_common.py
index 9fdcc1c89c1..f93d9483b43 100644
--- a/tests/components/alexa/test_common.py
+++ b/tests/components/alexa/test_common.py
@@ -7,7 +7,7 @@ import pytest
 
 from homeassistant.components.alexa import config, smart_home
 from homeassistant.components.alexa.const import CONF_ENDPOINT, CONF_FILTER, CONF_LOCALE
-from homeassistant.core import Context, callback
+from homeassistant.core import Context, HomeAssistant, callback
 from homeassistant.helpers import entityfilter
 
 from tests.common import async_mock_service
@@ -28,7 +28,7 @@ class MockConfig(smart_home.AlexaConfig):
         "camera.test": {"display_categories": "CAMERA"},
     }
 
-    def __init__(self, hass):
+    def __init__(self, hass: HomeAssistant) -> None:
         """Mock Alexa config."""
         super().__init__(
             hass,
diff --git a/tests/components/application_credentials/test_init.py b/tests/components/application_credentials/test_init.py
index e6fdf568bcc..134d996865d 100644
--- a/tests/components/application_credentials/test_init.py
+++ b/tests/components/application_credentials/test_init.py
@@ -124,7 +124,12 @@ def config_flow_handler(
 class OAuthFixture:
     """Fixture to facilitate testing an OAuth flow."""
 
-    def __init__(self, hass, hass_client, aioclient_mock):
+    def __init__(
+        self,
+        hass: HomeAssistant,
+        hass_client: ClientSessionGenerator,
+        aioclient_mock: AiohttpClientMocker,
+    ) -> None:
         """Initialize OAuthFixture."""
         self.hass = hass
         self.hass_client = hass_client
diff --git a/tests/components/media_player/test_async_helpers.py b/tests/components/media_player/test_async_helpers.py
index 783846d8857..750d2861f21 100644
--- a/tests/components/media_player/test_async_helpers.py
+++ b/tests/components/media_player/test_async_helpers.py
@@ -17,7 +17,7 @@ from homeassistant.core import HomeAssistant
 class SimpleMediaPlayer(mp.MediaPlayerEntity):
     """Media player test class."""
 
-    def __init__(self, hass):
+    def __init__(self, hass: HomeAssistant) -> None:
         """Initialize the test media player."""
         self.hass = hass
         self._volume = 0
diff --git a/tests/components/nest/test_config_flow.py b/tests/components/nest/test_config_flow.py
index 5c8f01c8e39..b6e84ce358f 100644
--- a/tests/components/nest/test_config_flow.py
+++ b/tests/components/nest/test_config_flow.py
@@ -56,7 +56,12 @@ def nest_test_config() -> NestTestConfig:
 class OAuthFixture:
     """Simulate the oauth flow used by the config flow."""
 
-    def __init__(self, hass, hass_client_no_auth, aioclient_mock):
+    def __init__(
+        self,
+        hass: HomeAssistant,
+        hass_client_no_auth: ClientSessionGenerator,
+        aioclient_mock: AiohttpClientMocker,
+    ) -> None:
         """Initialize OAuthFixture."""
         self.hass = hass
         self.hass_client = hass_client_no_auth
diff --git a/tests/components/universal/test_media_player.py b/tests/components/universal/test_media_player.py
index 69d4c8666cf..7c992814cfe 100644
--- a/tests/components/universal/test_media_player.py
+++ b/tests/components/universal/test_media_player.py
@@ -55,7 +55,7 @@ def validate_config(config):
 class MockMediaPlayer(media_player.MediaPlayerEntity):
     """Mock media player for testing."""
 
-    def __init__(self, hass, name):
+    def __init__(self, hass: HomeAssistant, name: str) -> None:
         """Initialize the media player."""
         self.hass = hass
         self._name = name