diff --git a/tests/components/caldav/test_calendar.py b/tests/components/caldav/test_calendar.py
index 9e0768e061ff..e33b5c9ac1e1 100644
--- a/tests/components/caldav/test_calendar.py
+++ b/tests/components/caldav/test_calendar.py
@@ -351,8 +351,9 @@ def get_api_events(
     async def api_call(entity_id: str) -> dict[str, Any]:
         client = await hass_client()
         response = await client.get(
-            # The start/end times are arbitrary since they are ignored by `_mock_calendar`
-            # which just returns all events for the calendar.
+            # The start/end times are arbitrary since they are
+            # ignored by `_mock_calendar` which just returns all
+            # events for the calendar.
             f"/api/calendars/{entity_id}?start=2022-01-01&end=2022-01-01"
         )
         assert response.status == HTTPStatus.OK
@@ -732,7 +733,10 @@ async def test_all_day_event(
     freezer: FrozenDateTimeFactory,
     target_datetime: datetime.datetime,
 ) -> None:
-    """Test that the event lasting the whole day is returned, if it's early in the local day."""
+    """Test that the event lasting the whole day is returned.
+
+    Specifically when it's early in the local day.
+    """
     freezer.move_to(target_datetime.replace(tzinfo=dt_util.get_default_time_zone()))
     assert await async_setup_component(
         hass,
@@ -912,7 +916,10 @@ async def test_event_rrule_all_day_early(
     freezer: FrozenDateTimeFactory,
     target_datetime: datetime.datetime,
 ) -> None:
-    """Test that the recurring all day event is returned early in the local day, and not on the first occurrence."""
+    """Test recurring all day event is returned early in the day.
+
+    Verifies it's not returned on the first occurrence.
+    """
     freezer.move_to(target_datetime.replace(tzinfo=dt_util.get_default_time_zone()))
     assert await async_setup_component(
         hass,
@@ -1199,7 +1206,10 @@ async def test_config_entry_supported_components(
     hass: HomeAssistant,
     config_entry: MockConfigEntry,
 ) -> None:
-    """Test that calendars are only created for VEVENT types when using a config entry."""
+    """Test calendars are only created for VEVENT types.
+
+    This applies when using a config entry.
+    """
     config_entry.add_to_hass(hass)
     await hass.config_entries.async_setup(config_entry.entry_id)
 
diff --git a/tests/components/calendar/test_init.py b/tests/components/calendar/test_init.py
index fc2df431db98..40e7a50878b8 100644
--- a/tests/components/calendar/test_init.py
+++ b/tests/components/calendar/test_init.py
@@ -57,7 +57,10 @@ async def mock_setup_platform(
     mock_setup_integration: None,
     config_entry: MockConfigEntry,
 ) -> None:
-    """Fixture to setup platforms used in the test and fixtures are set up in the right order."""
+    """Fixture to set up platforms used in the test.
+
+    Ensures fixtures are set up in the right order.
+    """
     assert await hass.config_entries.async_setup(config_entry.entry_id)
     await hass.async_block_till_done()
 
@@ -573,18 +576,24 @@ async def test_list_events_missing_fields(hass: HomeAssistant) -> None:
                 "start_date_time": "2023-06-22T04:30:00-06:00",
                 "end_date_time": "2023-06-22T04:30:00-06:00",
             },
-            "Expected end time to be after start time (2023-06-22 04:30:00-06:00, 2023-06-22 04:30:00-06:00)",
+            "Expected end time to be after start time"
+            " (2023-06-22 04:30:00-06:00,"
+            " 2023-06-22 04:30:00-06:00)",
         ),
         (
             {
                 "start_date_time": "2023-06-22T04:30:00",
                 "end_date_time": "2023-06-22T04:30:00",
             },
-            "Expected end time to be after start time (2023-06-22 04:30:00, 2023-06-22 04:30:00)",
+            "Expected end time to be after start time"
+            " (2023-06-22 04:30:00,"
+            " 2023-06-22 04:30:00)",
         ),
         (
             {"start_date_time": "2023-06-22", "end_date_time": "2023-06-22"},
-            "Expected end time to be after start time (2023-06-22 00:00:00, 2023-06-22 00:00:00)",
+            "Expected end time to be after start time"
+            " (2023-06-22 00:00:00,"
+            " 2023-06-22 00:00:00)",
         ),
         (
             {"start_date_time": "2023-06-22 10:00:00", "duration": "0"},
diff --git a/tests/components/calendar/test_trigger.py b/tests/components/calendar/test_trigger.py
index 9ed5628514ed..dcd7b1faa835 100644
--- a/tests/components/calendar/test_trigger.py
+++ b/tests/components/calendar/test_trigger.py
@@ -139,7 +139,7 @@ class LegacyTriggerFormat(TriggerFormat):
 
 @dataclass
 class TargetTriggerFormat(TriggerFormat):
-    """Target trigger format using platform: calendar.event_started/ended with target."""
+    """Target trigger format using event_started/ended."""
 
     id: str = "target"
 
diff --git a/tests/components/cambridge_audio/test_media_player.py b/tests/components/cambridge_audio/test_media_player.py
index f4bc57631f45..0dafa51d8552 100644
--- a/tests/components/cambridge_audio/test_media_player.py
+++ b/tests/components/cambridge_audio/test_media_player.py
@@ -502,7 +502,10 @@ async def test_play_media_unknown_type(
 
     with pytest.raises(
         HomeAssistantError,
-        match="Unsupported media type for Cambridge Audio device: unsupported_content_type",
+        match=(
+            "Unsupported media type for Cambridge Audio"
+            " device: unsupported_content_type"
+        ),
     ):
         await hass.services.async_call(
             MP_DOMAIN,
diff --git a/tests/components/camera/conftest.py b/tests/components/camera/conftest.py
index 4375f11fcee0..2a4a4eda4bf8 100644
--- a/tests/components/camera/conftest.py
+++ b/tests/components/camera/conftest.py
@@ -168,9 +168,10 @@ def mock_create_stream_fixture() -> Generator[Mock]:
 async def mock_test_webrtc_cameras(hass: HomeAssistant) -> None:
     """Initialize test WebRTC cameras with native RTC support."""
 
-    # Cannot use the fixture mock_camera_web_rtc as it's mocking Camera.async_handle_web_rtc_offer
-    # and native support is checked by verify the function "async_handle_web_rtc_offer" was
-    # overwritten(implemented) or not
+    # Cannot use the fixture mock_camera_web_rtc as it's
+    # mocking Camera.async_handle_web_rtc_offer and native
+    # support is checked by verifying the function
+    # "async_handle_web_rtc_offer" was overwritten or not
     class BaseCamera(camera.Camera):
         """Base Camera."""
 
@@ -182,7 +183,10 @@ async def mock_test_webrtc_cameras(hass: HomeAssistant) -> None:
             return STREAM_SOURCE
 
     class AsyncNoCandidateCamera(BaseCamera):
-        """Mock Camera with native async WebRTC support but not implemented candidate support."""
+        """Mock Camera with native async WebRTC support.
+
+        Does not implement candidate support.
+        """
 
         _attr_name = "Async No Candidate"
 
diff --git a/tests/components/camera/test_img_util.py b/tests/components/camera/test_img_util.py
index 8081a2ca0603..9f2ab678ca58 100644
--- a/tests/components/camera/test_img_util.py
+++ b/tests/components/camera/test_img_util.py
@@ -93,7 +93,8 @@ def test_turbojpeg_load_failure(
             (
                 "homeassistant.components.camera.img_util",
                 logging.ERROR,
-                "Error loading libturbojpeg; Camera snapshot performance will be sub-optimal",
+                "Error loading libturbojpeg; Camera snapshot"
+                " performance will be sub-optimal",
             )
         ]
 
diff --git a/tests/components/camera/test_init.py b/tests/components/camera/test_init.py
index 841439bd34f1..2a56a41cc904 100644
--- a/tests/components/camera/test_init.py
+++ b/tests/components/camera/test_init.py
@@ -836,7 +836,7 @@ async def _register_test_webrtc_provider(hass: HomeAssistant) -> Callable[[], No
             session_id: str,
             send_message: WebRTCSendMessage,
         ) -> None:
-            """Handle the WebRTC offer and return the answer via the provided callback."""
+            """Handle the WebRTC offer and return the answer."""
             send_message(WebRTCAnswer("answer"))
 
         async def async_on_webrtc_candidate(
@@ -917,7 +917,7 @@ async def test_camera_capabilities_webrtc(
 async def test_webrtc_provider_not_added_for_native_webrtc(
     hass: HomeAssistant,
 ) -> None:
-    """Test that a WebRTC provider is not added to a camera when the camera has native WebRTC support."""
+    """Test that a WebRTC provider is not added for native WebRTC."""
     camera_obj = get_camera_from_entity_id(hass, "camera.async")
     assert camera_obj
     assert camera_obj._webrtc_provider is None
diff --git a/tests/components/camera/test_webrtc.py b/tests/components/camera/test_webrtc.py
index b43c043fdeb4..a0f8b2c5386b 100644
--- a/tests/components/camera/test_webrtc.py
+++ b/tests/components/camera/test_webrtc.py
@@ -212,7 +212,10 @@ async def test_ws_get_client_config_no_rtc_camera(
     assert not msg["success"]
     assert msg["error"] == {
         "code": "webrtc_get_client_config_failed",
-        "message": "Camera does not support WebRTC, frontend_stream_types={<StreamType.HLS: 'hls'>}",
+        "message": (
+            "Camera does not support WebRTC,"
+            " frontend_stream_types={<StreamType.HLS: 'hls'>}"
+        ),
     }
 
 
@@ -276,7 +279,7 @@ async def test_websocket_webrtc_offer_webrtc_provider_deprecated(
     hass_ws_client: WebSocketGenerator,
     register_test_provider: SomeTestProvider,
 ) -> None:
-    """Test initiating a WebRTC stream with a webrtc provider with the deprecated class."""
+    """Test initiating a WebRTC stream with a deprecated provider."""
     await _test_websocket_webrtc_offer_webrtc_provider(
         hass,
         hass_ws_client,
@@ -443,7 +446,10 @@ async def test_websocket_webrtc_offer_invalid_stream_type(
     assert not response["success"]
     assert response["error"] == {
         "code": "webrtc_offer_failed",
-        "message": "Camera does not support WebRTC, frontend_stream_types={<StreamType.HLS: 'hls'>}",
+        "message": (
+            "Camera does not support WebRTC,"
+            " frontend_stream_types={<StreamType.HLS: 'hls'>}"
+        ),
     }
 
 
@@ -508,15 +514,19 @@ async def test_ws_webrtc_candidate(
         (
             {"sdpMLineIndex": 0},
             (
-                'Field "candidate" of type str is missing in RTCIceCandidateInit instance'
-                " for dictionary value @ data['candidate']. Got {'sdpMLineIndex': 0}"
+                'Field "candidate" of type str is missing in'
+                " RTCIceCandidateInit instance for dictionary"
+                " value @ data['candidate']."
+                " Got {'sdpMLineIndex': 0}"
             ),
         ),
         (
             {"candidate": "candidate", "sdpMLineIndex": -1},
             (
-                "sdpMLineIndex must be greater than or equal to 0 for dictionary value @ "
-                "data['candidate']. Got {'candidate': 'candidate', 'sdpMLineIndex': -1}"
+                "sdpMLineIndex must be greater than or equal"
+                " to 0 for dictionary value @"
+                " data['candidate']. Got {'candidate':"
+                " 'candidate', 'sdpMLineIndex': -1}"
             ),
         ),
     ],
@@ -669,7 +679,10 @@ async def test_ws_webrtc_candidate_invalid_stream_type(
     assert not response["success"]
     assert response["error"] == {
         "code": "webrtc_candidate_failed",
-        "message": "Camera does not support WebRTC, frontend_stream_types={<StreamType.HLS: 'hls'>}",
+        "message": (
+            "Camera does not support WebRTC,"
+            " frontend_stream_types={<StreamType.HLS: 'hls'>}"
+        ),
     }
 
 
diff --git a/tests/components/casper_glow/test_light.py b/tests/components/casper_glow/test_light.py
index 8cadb4caac3c..76f812c0e669 100644
--- a/tests/components/casper_glow/test_light.py
+++ b/tests/components/casper_glow/test_light.py
@@ -174,7 +174,10 @@ async def test_command_error(
     service: str,
     mock_method: str,
 ) -> None:
-    """Test that a device error raises HomeAssistantError without marking entity unavailable."""
+    """Test device error raises HomeAssistantError.
+
+    The entity should not be marked as unavailable.
+    """
     getattr(mock_casper_glow, mock_method).side_effect = CasperGlowError(
         "Connection failed"
     )
@@ -198,7 +201,7 @@ async def test_state_update_via_callback_after_command_failure(
     mock_casper_glow: MagicMock,
     fire_callbacks: Callable[[GlowState], Awaitable[None]],
 ) -> None:
-    """Test that device callbacks correctly update state even after a command failure."""
+    """Test callbacks update state after a command failure."""
     mock_casper_glow.turn_on.side_effect = CasperGlowError("Connection failed")
 
     # Fail a command — entity remains in last known state (unknown), not unavailable
diff --git a/tests/components/casper_glow/test_select.py b/tests/components/casper_glow/test_select.py
index 2ed72541435c..fa1fa3e8c6bf 100644
--- a/tests/components/casper_glow/test_select.py
+++ b/tests/components/casper_glow/test_select.py
@@ -120,7 +120,7 @@ async def test_select_state_update_via_callback_after_command_failure(
     mock_casper_glow: MagicMock,
     fire_callbacks: Callable[[GlowState], Awaitable[None]],
 ) -> None:
-    """Test that device callbacks correctly update state even after a command failure."""
+    """Test callbacks update state after a command failure."""
     mock_casper_glow.set_brightness_and_dimming_time.side_effect = CasperGlowError(
         "Connection failed"
     )
diff --git a/tests/components/climate/test_init.py b/tests/components/climate/test_init.py
index 583f16590d31..a0307c45310e 100644
--- a/tests/components/climate/test_init.py
+++ b/tests/components/climate/test_init.py
@@ -231,7 +231,11 @@ async def test_temperature_features_is_valid(
 
     with pytest.raises(
         ServiceValidationError,
-        match="Set temperature action was used with the 'Target temperature' parameter but the entity does not support it",
+        match=(
+            "Set temperature action was used with the"
+            " 'Target temperature' parameter but the"
+            " entity does not support it"
+        ),
     ):
         await hass.services.async_call(
             DOMAIN,
@@ -245,7 +249,11 @@ async def test_temperature_features_is_valid(
 
     with pytest.raises(
         ServiceValidationError,
-        match="Set temperature action was used with the 'Lower/Upper target temperature' parameter but the entity does not support it",
+        match=(
+            "Set temperature action was used with the"
+            " 'Lower/Upper target temperature' parameter"
+            " but the entity does not support it"
+        ),
     ):
         await hass.services.async_call(
             DOMAIN,
@@ -380,7 +388,10 @@ async def test_mode_validation(
 
     with pytest.raises(
         ServiceValidationError,
-        match="Horizontal swing mode invalid is not valid. Valid horizontal swing modes are: on, off",
+        match=(
+            "Horizontal swing mode invalid is not valid."
+            " Valid horizontal swing modes are: on, off"
+        ),
     ) as exc:
         await hass.services.async_call(
             DOMAIN,
@@ -392,8 +403,8 @@ async def test_mode_validation(
             blocking=True,
         )
     assert (
-        str(exc.value)
-        == "Horizontal swing mode invalid is not valid. Valid horizontal swing modes are: on, off"
+        str(exc.value) == "Horizontal swing mode invalid is not valid."
+        " Valid horizontal swing modes are: on, off"
     )
     assert exc.value.translation_key == "not_valid_horizontal_swing_mode"
 
@@ -703,7 +714,10 @@ async def test_target_temp_high_higher_than_low(
 
     with pytest.raises(
         ServiceValidationError,
-        match="'Lower target temperature' cannot be higher than 'Upper target temperature'",
+        match=(
+            "'Lower target temperature' cannot be higher"
+            " than 'Upper target temperature'"
+        ),
     ) as exc:
         await hass.services.async_call(
             DOMAIN,
diff --git a/tests/components/climate/test_intent.py b/tests/components/climate/test_intent.py
index c992480cae7c..820874833df0 100644
--- a/tests/components/climate/test_intent.py
+++ b/tests/components/climate/test_intent.py
@@ -334,7 +334,7 @@ async def test_set_temperature_no_entities(
 
 
 async def test_set_temperature_not_supported(hass: HomeAssistant) -> None:
-    """Test HassClimateSetTemperature intent when climate entity doesn't support required feature."""
+    """Test HassClimateSetTemperature intent without support."""
     assert await async_setup_component(hass, "homeassistant", {})
     await climate_intent.async_setup_intents(hass)
 
diff --git a/tests/components/climate/test_trigger.py b/tests/components/climate/test_trigger.py
index 8eceb14202f6..433da7082bad 100644
--- a/tests/components/climate/test_trigger.py
+++ b/tests/components/climate/test_trigger.py
@@ -221,7 +221,7 @@ async def test_climate_state_trigger_behavior_any(
     trigger_options: dict[str, Any],
     states: list[TriggerStateDescription],
 ) -> None:
-    """Test that the climate state trigger fires when any climate state changes to a specific state."""
+    """Test climate trigger fires on any state change."""
     await assert_trigger_behavior_any(
         hass,
         target_entities=target_climates,
@@ -295,7 +295,7 @@ async def test_climate_state_attribute_trigger_behavior_any(
     trigger_options: dict[str, Any],
     states: list[TriggerStateDescription],
 ) -> None:
-    """Test that the climate state trigger fires when any climate state changes to a specific state."""
+    """Test climate attribute trigger fires on any change."""
     await assert_trigger_behavior_any(
         hass,
         target_entities=target_climates,
@@ -353,7 +353,7 @@ async def test_climate_state_trigger_behavior_first(
     trigger_options: dict[str, Any],
     states: list[TriggerStateDescription],
 ) -> None:
-    """Test that the climate state trigger fires when the first climate changes to a specific state."""
+    """Test climate trigger fires on first state change."""
     await assert_trigger_behavior_first(
         hass,
         target_entities=target_climates,
@@ -414,7 +414,7 @@ async def test_climate_state_attribute_trigger_behavior_first(
     trigger_options: dict[str, Any],
     states: list[tuple[tuple[str, dict], int]],
 ) -> None:
-    """Test that the climate state trigger fires when the first climate state changes to a specific state."""
+    """Test climate attribute trigger fires on first change."""
     await assert_trigger_behavior_first(
         hass,
         target_entities=target_climates,
@@ -472,7 +472,7 @@ async def test_climate_state_trigger_behavior_last(
     trigger_options: dict[str, Any],
     states: list[TriggerStateDescription],
 ) -> None:
-    """Test that the climate state trigger fires when the last climate changes to a specific state."""
+    """Test climate trigger fires on last state change."""
     await assert_trigger_behavior_last(
         hass,
         target_entities=target_climates,
@@ -533,7 +533,7 @@ async def test_climate_state_attribute_trigger_behavior_last(
     trigger_options: dict[str, Any],
     states: list[tuple[tuple[str, dict], int]],
 ) -> None:
-    """Test that the climate state trigger fires when the last climate state changes to a specific state."""
+    """Test climate attribute trigger fires on last change."""
     await assert_trigger_behavior_last(
         hass,
         target_entities=target_climates,
diff --git a/tests/components/cloud/test_backup.py b/tests/components/cloud/test_backup.py
index fa1a6050d003..aa786c5653cb 100644
--- a/tests/components/cloud/test_backup.py
+++ b/tests/components/cloud/test_backup.py
@@ -499,7 +499,8 @@ async def test_agents_upload_fail(
     [
         (
             CloudApiNonRetryableError("Boom!", code="NC-SH-FH-03"),
-            "The backup size of 13.37GB is too large to be uploaded to Home Assistant Cloud",
+            "The backup size of 13.37GB is too large to be"
+            " uploaded to Home Assistant Cloud",
         ),
         (
             CloudApiNonRetryableError("Boom!", code="NC-CE-01"),
diff --git a/tests/components/cloud/test_entity.py b/tests/components/cloud/test_entity.py
index 910317edffb3..32c56ac2b2ca 100644
--- a/tests/components/cloud/test_entity.py
+++ b/tests/components/cloud/test_entity.py
@@ -270,7 +270,7 @@ async def test_async_handle_chat_log_service_sets_structured_output_non_strict(
     entity_registry: er.EntityRegistry,
     mock_cloud_login: None,
 ) -> None:
-    """Ensure structured output requests always disable strict validation via service."""
+    """Ensure structured output disables strict validation."""
     assert await async_setup_component(hass, DOMAIN, {})
     await hass.async_block_till_done()
 
diff --git a/tests/components/cloud/test_http_api.py b/tests/components/cloud/test_http_api.py
index ec0bf38e4502..f97e1c907518 100644
--- a/tests/components/cloud/test_http_api.py
+++ b/tests/components/cloud/test_http_api.py
@@ -455,7 +455,7 @@ async def test_login_view_mfa_required_tokens_missing(
     setup_cloud: None,
     hass_client: ClientSessionGenerator,
 ) -> None:
-    """Test logging in when MFA is required, code is provided, but session tokens are missing."""
+    """Test MFA login when code is given but tokens are missing."""
     cloud_client = await hass_client()
     cloud.login.side_effect = MFARequired(mfa_tokens={})
 
diff --git a/tests/components/cloud/test_init.py b/tests/components/cloud/test_init.py
index 92d9660016cb..a341da6fad43 100644
--- a/tests/components/cloud/test_init.py
+++ b/tests/components/cloud/test_init.py
@@ -409,7 +409,7 @@ async def test_async_listen_cloudhook_change_cloud_setup_later(
     cloud: MagicMock,
     set_cloud_prefs: Callable[[dict[str, Any]], Coroutine[Any, Any, None]],
 ) -> None:
-    """Test async_listen_cloudhook_change works when cloud is set up after listener registration."""
+    """Test cloudhook change listener with late cloud setup."""
     webhook_id = "mock-webhook-id"
     cloudhook_url = "https://cloudhook.nabu.casa/abcdefg"
 
diff --git a/tests/components/cloudflare_r2/test_backup.py b/tests/components/cloudflare_r2/test_backup.py
index 9e60d034e8c3..35ec5704af6e 100644
--- a/tests/components/cloudflare_r2/test_backup.py
+++ b/tests/components/cloudflare_r2/test_backup.py
@@ -411,7 +411,9 @@ async def test_multipart_upload_consistent_part_sizes(
     assert len(uploaded_part_sizes) >= 2, "Expected at least 2 parts"
     non_trailing_parts = uploaded_part_sizes[:-1]
     assert all(size == MULTIPART_MIN_PART_SIZE_BYTES for size in non_trailing_parts), (
-        f"All non-trailing parts should be {MULTIPART_MIN_PART_SIZE_BYTES} bytes, got {non_trailing_parts}"
+        f"All non-trailing parts should be"
+        f" {MULTIPART_MIN_PART_SIZE_BYTES} bytes,"
+        f" got {non_trailing_parts}"
     )
 
     # Verify the trailing part contains the remainder
@@ -524,7 +526,9 @@ async def test_error_during_delete(
     assert response["success"]
     assert response["result"] == {
         "agent_errors": {
-            f"{DOMAIN}.{mock_config_entry.entry_id}": "Failed during async_delete_backup"
+            f"{DOMAIN}.{mock_config_entry.entry_id}": (
+                "Failed during async_delete_backup"
+            )
         }
     }
 
diff --git a/tests/components/color_extractor/test_services.py b/tests/components/color_extractor/test_services.py
index 619e786712ce..1dbce562065c 100644
--- a/tests/components/color_extractor/test_services.py
+++ b/tests/components/color_extractor/test_services.py
@@ -124,7 +124,8 @@ async def _async_execute_service(hass: HomeAssistant, service_data: dict[str, An
     assert state
     assert state.state == STATE_OFF
 
-    # Call the shared service, our above mock should return the base64 decoded fixture 1x1 pixel
+    # Call the shared service, our above mock should return
+    # the base64 decoded fixture 1x1 pixel
     await hass.services.async_call(DOMAIN, SERVICE_TURN_ON, service_data, blocking=True)
 
     await hass.async_block_till_done()
@@ -293,7 +294,7 @@ async def test_file(hass: HomeAssistant, setup_integration) -> None:
 @patch("os.path.isfile", Mock(return_value=True))
 @patch("os.access", Mock(return_value=True))
 async def test_file_denied_dir(hass: HomeAssistant, setup_integration) -> None:
-    """Test that the file only service fails to read an image in a dir not explicitly allowed."""
+    """Test file service fails for images in disallowed dirs."""
     service_data = {
         ATTR_PATH: "/path/to/a/dir/not/allowed/image.png",
         ATTR_ENTITY_ID: LIGHT_ENTITY,
diff --git a/tests/components/command_line/test_binary_sensor.py b/tests/components/command_line/test_binary_sensor.py
index c0c0fe421ed8..dea60f5cd867 100644
--- a/tests/components/command_line/test_binary_sensor.py
+++ b/tests/components/command_line/test_binary_sensor.py
@@ -95,7 +95,9 @@ async def test_setup_platform_yaml(
                         "payload_off": "0",
                         "value_template": "{{ value | multiply(0.1) }}",
                         "icon": (
-                            '{% if this.attributes.icon=="mdi:icon2" %} mdi:icon1 {% else %} mdi:icon2 {% endif %}'
+                            '{% if this.attributes.icon=="mdi:icon2" %}'
+                            " mdi:icon1"
+                            " {% else %} mdi:icon2 {% endif %}"
                         ),
                     }
                 }
@@ -261,8 +263,8 @@ async def test_updating_to_often(
     wait_till_event.set()
     await asyncio.sleep(0)
     assert (
-        "Updating Command Line Binary Sensor Test took longer than the scheduled update interval"
-        not in caplog.text
+        "Updating Command Line Binary Sensor Test took longer"
+        " than the scheduled update interval" not in caplog.text
     )
 
     # Simulate update takes too long
@@ -274,8 +276,8 @@ async def test_updating_to_often(
     await asyncio.sleep(0)
 
     assert (
-        "Updating Command Line Binary Sensor Test took longer than the scheduled update interval"
-        in caplog.text
+        "Updating Command Line Binary Sensor Test took longer"
+        " than the scheduled update interval" in caplog.text
     )
 
 
diff --git a/tests/components/command_line/test_cover.py b/tests/components/command_line/test_cover.py
index 576f87382607..c8ef9524a74e 100644
--- a/tests/components/command_line/test_cover.py
+++ b/tests/components/command_line/test_cover.py
@@ -286,8 +286,8 @@ async def test_updating_to_often(
 
     assert not called
     assert (
-        "Updating Command Line Cover Test took longer than the scheduled update interval"
-        not in caplog.text
+        "Updating Command Line Cover Test took longer"
+        " than the scheduled update interval" not in caplog.text
     )
     async_fire_time_changed(hass, dt_util.now() + timedelta(seconds=11))
     await hass.async_block_till_done(wait_background_tasks=True)
@@ -295,8 +295,8 @@ async def test_updating_to_often(
     called.clear()
 
     assert (
-        "Updating Command Line Cover Test took longer than the scheduled update interval"
-        not in caplog.text
+        "Updating Command Line Cover Test took longer"
+        " than the scheduled update interval" not in caplog.text
     )
 
     # Simulate update takes too long
@@ -310,8 +310,8 @@ async def test_updating_to_often(
     await hass.async_block_till_done(wait_background_tasks=True)
     assert called
     assert (
-        "Updating Command Line Cover Test took longer than the scheduled update interval"
-        in caplog.text
+        "Updating Command Line Cover Test took longer"
+        " than the scheduled update interval" in caplog.text
     )
 
 
@@ -442,7 +442,12 @@ async def test_icon_template(hass: HomeAssistant) -> None:
                             "command_close": f"echo 0 > {path}",
                             "command_stop": f"echo 0 > {path}",
                             "name": "Test",
-                            "icon": '{% if this.attributes.icon=="mdi:icon2" %} mdi:icon1 {% else %} mdi:icon2 {% endif %}',
+                            "icon": (
+                                "{% if this.attributes.icon=="
+                                '"mdi:icon2" %} mdi:icon1'
+                                " {% else %} mdi:icon2"
+                                " {% endif %}"
+                            ),
                         }
                     }
                 ]
diff --git a/tests/components/command_line/test_sensor.py b/tests/components/command_line/test_sensor.py
index 1c22e483e54e..9e5e1b78aaed 100644
--- a/tests/components/command_line/test_sensor.py
+++ b/tests/components/command_line/test_sensor.py
@@ -149,7 +149,9 @@ async def test_template_render_with_quote(hass: HomeAssistant) -> None:
                 {
                     "sensor": {
                         "name": "Test",
-                        "command": 'echo "{{ states.sensor.input_sensor.state }}" "3 4"',
+                        "command": (
+                            'echo "{{ states.sensor.input_sensor.state }}" "3 4"'
+                        ),
                     }
                 }
             ]
@@ -269,8 +271,12 @@ async def test_return_code(
                     "sensor": {
                         "name": "Test",
                         "command": (
-                            'echo { \\"key\\": \\"some_json_value\\", \\"another_key\\": '
-                            '\\"another_json_value\\", \\"key_three\\": \\"value_three\\" }'
+                            'echo { \\"key\\":'
+                            ' \\"some_json_value\\",'
+                            ' \\"another_key\\":'
+                            ' \\"another_json_value\\",'
+                            ' \\"key_three\\":'
+                            ' \\"value_three\\" }'
                         ),
                         "json_attributes": ["key", "another_key", "key_three"],
                     }
@@ -300,8 +306,12 @@ async def test_update_with_json_attrs(
                     "sensor": {
                         "name": "Test",
                         "command": (
-                            'echo { \\"key\\": \\"some_json_value\\", \\"another_key\\": '
-                            '\\"another_json_value\\", \\"key_three\\": \\"value_three\\" }'
+                            'echo { \\"key\\":'
+                            ' \\"some_json_value\\",'
+                            ' \\"another_key\\":'
+                            ' \\"another_json_value\\",'
+                            ' \\"key_three\\":'
+                            ' \\"value_three\\" }'
                         ),
                         "json_attributes": ["key", "another_key", "key_three"],
                         "value_template": '{{ value_json["key"] }}',
@@ -431,8 +441,12 @@ async def test_update_with_json_attrs_bad_json(
                     "sensor": {
                         "name": "Test",
                         "command": (
-                            'echo { \\"key\\": \\"some_json_value\\", \\"another_key\\": '
-                            '\\"another_json_value\\", \\"key_three\\": \\"value_three\\" }'
+                            'echo { \\"key\\":'
+                            ' \\"some_json_value\\",'
+                            ' \\"another_key\\":'
+                            ' \\"another_json_value\\",'
+                            ' \\"key_three\\":'
+                            ' \\"value_three\\" }'
                         ),
                         "json_attributes": [
                             "key",
@@ -468,8 +482,12 @@ async def test_update_with_missing_json_attrs(
                     "sensor": {
                         "name": "Test",
                         "command": (
-                            'echo { \\"key\\": \\"some_json_value\\", \\"another_key\\": '
-                            '\\"another_json_value\\", \\"key_three\\": \\"value_three\\" }'
+                            'echo { \\"key\\":'
+                            ' \\"some_json_value\\",'
+                            ' \\"another_key\\":'
+                            ' \\"another_json_value\\",'
+                            ' \\"key_three\\":'
+                            ' \\"value_three\\" }'
                         ),
                         "json_attributes": ["key", "another_key"],
                     }
@@ -519,7 +537,7 @@ async def test_update_with_unnecessary_json_attrs(
 async def test_update_with_json_attrs_with_json_attrs_path(
     hass: HomeAssistant, load_yaml_integration: None
 ) -> None:
-    """Test using json_attributes_path to select a different part of the json object as root."""
+    """Test json_attributes_path selects a different root."""
 
     entity_state = hass.states.get("sensor.test")
     assert entity_state
@@ -618,8 +636,8 @@ async def test_updating_to_often(
     await asyncio.sleep(0)
 
     assert (
-        "Updating Command Line Sensor Test took longer than the scheduled update interval"
-        not in caplog.text
+        "Updating Command Line Sensor Test took longer"
+        " than the scheduled update interval" not in caplog.text
     )
 
     # Simulate update takes too long
@@ -631,8 +649,8 @@ async def test_updating_to_often(
     await asyncio.sleep(0)
 
     assert (
-        "Updating Command Line Sensor Test took longer than the scheduled update interval"
-        in caplog.text
+        "Updating Command Line Sensor Test took longer"
+        " than the scheduled update interval" in caplog.text
     )
 
 
@@ -719,7 +737,9 @@ async def test_scrape_sensor_device_timestamp(
                         "name": "Test",
                         "command": "echo January 17, 2022",
                         "device_class": "date",
-                        "value_template": "{{ strptime(value, '%B %d, %Y').strftime('%Y-%m-%d') }}",
+                        "value_template": (
+                            "{{ strptime(value, '%B %d, %Y').strftime('%Y-%m-%d') }}"
+                        ),
                     }
                 }
             ]
@@ -751,7 +771,9 @@ async def test_template_not_error_when_data_is_none(
                             "name": "Test",
                             "command": "failed command",
                             "unit_of_measurement": "MB",
-                            "value_template": "{{ (value.split('\t')[0]|int(0)/1000)|round(3) }}",
+                            "value_template": (
+                                "{{ (value.split('\t')[0]|int(0)/1000)|round(3) }}"
+                            ),
                         }
                     }
                 ]
@@ -853,9 +875,13 @@ async def test_availability_json_attributes_without_value_template(
                         "name": "Test",
                         "command": "echo January 17, 2022",
                         "device_class": "date",
-                        "value_template": "{{ strptime(value, '%B %d, %Y').strftime('%Y-%m-%d') }}",
+                        "value_template": (
+                            "{{ strptime(value, '%B %d, %Y').strftime('%Y-%m-%d') }}"
+                        ),
                         "availability": '{{ states("sensor.input1")=="on" }}',
-                        "icon": "mdi:o{{ 'n' if states('sensor.input1')=='on' else 'ff' }}",
+                        "icon": (
+                            "mdi:o{{ 'n' if states('sensor.input1')=='on' else 'ff' }}"
+                        ),
                     }
                 }
             ]
@@ -929,8 +955,8 @@ async def test_template_render_with_availability_syntax_error(
     assert state.state == "1"
 
     assert (
-        "Error rendering availability template for sensor.test: UndefinedError: 'what_the_heck' is undefined"
-        in caplog.text
+        "Error rendering availability template for sensor.test:"
+        " UndefinedError: 'what_the_heck' is undefined" in caplog.text
     )
 
 
diff --git a/tests/components/command_line/test_switch.py b/tests/components/command_line/test_switch.py
index 12152e0d5b32..ce75dedf32a5 100644
--- a/tests/components/command_line/test_switch.py
+++ b/tests/components/command_line/test_switch.py
@@ -123,7 +123,8 @@ async def test_state_value(hass: HomeAssistant) -> None:
                             "command_off": f"echo 0 > {path}",
                             "value_template": '{{ value=="1" }}',
                             "icon": (
-                                '{% if value=="1" %} mdi:on {% else %} mdi:off {% endif %}'
+                                '{% if value=="1" %} mdi:on'
+                                " {% else %} mdi:off {% endif %}"
                             ),
                             "name": "Test",
                         }
@@ -556,7 +557,10 @@ async def test_templating(hass: HomeAssistant) -> None:
                             "command_off": f"echo 0 > {path}",
                             "value_template": '{{ value=="1" }}',
                             "icon": (
-                                '{% if this.attributes.icon=="mdi:icon2" %} mdi:icon1 {% else %} mdi:icon2 {% endif %}'
+                                "{% if this.attributes.icon=="
+                                '"mdi:icon2" %} mdi:icon1'
+                                " {% else %} mdi:icon2"
+                                " {% endif %}"
                             ),
                             "name": "Test",
                         }
@@ -568,7 +572,10 @@ async def test_templating(hass: HomeAssistant) -> None:
                             "command_off": f"echo 0 > {path}",
                             "value_template": '{{ value=="1" }}',
                             "icon": (
-                                '{% if states("switch.test")=="off" %} mdi:off {% else %} mdi:on {% endif %}'
+                                '{% if states("switch.test")=='
+                                '"off" %} mdi:off'
+                                " {% else %} mdi:on"
+                                " {% endif %}"
                             ),
                             "name": "Test2",
                         },
@@ -647,8 +654,8 @@ async def test_updating_to_often(
 
     assert not called
     assert (
-        "Updating Command Line Switch Test took longer than the scheduled update interval"
-        not in caplog.text
+        "Updating Command Line Switch Test took longer"
+        " than the scheduled update interval" not in caplog.text
     )
     async_fire_time_changed(hass, dt_util.now() + timedelta(seconds=11))
     await hass.async_block_till_done()
@@ -656,8 +663,8 @@ async def test_updating_to_often(
     called.clear()
 
     assert (
-        "Updating Command Line Switch Test took longer than the scheduled update interval"
-        not in caplog.text
+        "Updating Command Line Switch Test took longer"
+        " than the scheduled update interval" not in caplog.text
     )
 
     # Simulate update takes too long
@@ -671,8 +678,8 @@ async def test_updating_to_often(
     await hass.async_block_till_done()
     assert called
     assert (
-        "Updating Command Line Switch Test took longer than the scheduled update interval"
-        in caplog.text
+        "Updating Command Line Switch Test took longer"
+        " than the scheduled update interval" in caplog.text
     )
 
 
diff --git a/tests/components/common.py b/tests/components/common.py
index 73c67e8cd85b..0e6dc202ce75 100644
--- a/tests/components/common.py
+++ b/tests/components/common.py
@@ -219,7 +219,10 @@ class BasicTriggerStateDescription(TypedDict):
 
 
 class TriggerStateDescription(BasicTriggerStateDescription):
-    """Test state and expected service call count for both included and excluded entities."""
+    """Test state and expected service call count.
+
+    Covers both included and excluded entities.
+    """
 
     excluded_state: StateDescription  # State for entities not meant to be targeted
     # State for the *other* targeted entities (the ones not under direct test).
@@ -237,7 +240,9 @@ class ConditionStateDescription(TypedDict):
     excluded_state: StateDescription  # State for entities not meant to be targeted
 
     condition_true: bool  # If the condition is expected to evaluate to true
-    condition_true_first_entity: bool  # If the condition is expected to evaluate to true for the first targeted entity
+    # If the condition is expected to evaluate to true
+    # for the first targeted entity
+    condition_true_first_entity: bool
 
 
 def _parametrize_condition_states(
@@ -836,7 +841,7 @@ def parametrize_numerical_attribute_changed_trigger_states(
     attribute_value_scale: float = 1.0,
     attribute_required: bool = False,
 ) -> list[tuple[str, dict[str, Any], list[TriggerStateDescription]]]:
-    """Parametrize states and expected service call counts for numerical-changed triggers.
+    """Parametrize states for numerical-changed triggers.
 
     Generates state sequences for a trigger that fires whenever an attribute
     crosses or matches a "changed" threshold (modes "any" / "above" / "below").
@@ -982,7 +987,7 @@ def parametrize_numerical_attribute_crossed_threshold_trigger_states(
     attribute_value_scale: float = 1.0,
     attribute_required: bool = False,
 ) -> list[tuple[str, dict[str, Any], list[TriggerStateDescription]]]:
-    """Parametrize states and expected service call counts for numerical crossed-threshold triggers.
+    """Parametrize states for numerical crossed-threshold triggers.
 
     Generates state sequences for a trigger that fires when an attribute
     crosses a threshold boundary. The trigger is exercised across four
@@ -1150,11 +1155,11 @@ def parametrize_numerical_state_value_changed_trigger_states(
     trigger_options: dict[str, Any] | None = None,
     unit_attributes: dict | None = None,
 ) -> list[tuple[str, dict[str, Any], list[TriggerStateDescription]]]:
-    """Parametrize states and expected service call counts for numerical state-value changed triggers.
+    """Parametrize states for numerical state-value changed triggers.
 
-    Unlike parametrize_numerical_attribute_changed_trigger_states, this is for
-    entities where the tracked numerical value is in state.state (e.g. sensor
-    entities), not in an attribute.
+    Unlike parametrize_numerical_attribute_changed_trigger_states,
+    this is for entities where the tracked numerical value is in
+    state.state (e.g. sensor entities), not in an attribute.
     """
     from homeassistant.const import ATTR_DEVICE_CLASS  # noqa: PLC0415
 
@@ -1231,7 +1236,7 @@ def parametrize_numerical_state_value_crossed_threshold_trigger_states(
     trigger_options: dict[str, Any] | None = None,
     unit_attributes: dict | None = None,
 ) -> list[tuple[str, dict[str, Any], list[TriggerStateDescription]]]:
-    """Parametrize states and expected service call counts for numerical state-value crossed threshold triggers.
+    """Parametrize states for numerical state-value crossed threshold triggers.
 
     Unlike parametrize_numerical_attribute_crossed_threshold_trigger_states,
     this is for entities where the tracked numerical value is in state.state
@@ -1332,7 +1337,7 @@ async def arm_trigger(
     trigger_target: dict,
     calls: list[str],
 ) -> None:
-    """Arm the specified trigger and record fired entity_ids in calls when it triggers."""
+    """Arm the trigger and record fired entity_ids in calls."""
     options = {CONF_OPTIONS: {**trigger_options}} if trigger_options is not None else {}
 
     trigger_config = {
@@ -1481,7 +1486,7 @@ async def _validate_condition_options(
     *,
     valid: bool,
 ) -> None:
-    """Assert that a condition accepts or rejects the given options during validation."""
+    """Assert that a condition accepts or rejects the given options."""
     config: dict[str, Any] = {
         CONF_CONDITION: condition,
         CONF_TARGET: {ATTR_LABEL_ID: "test_label"},
@@ -1911,10 +1916,11 @@ def parametrize_numerical_condition_above_below_any(
     threshold_unit: str | None | UndefinedType = UNDEFINED,
     unit_attributes: dict | None = None,
 ) -> list[tuple[str, dict[str, Any], list[ConditionStateDescription]]]:
-    """Parametrize above/below/between threshold cases for state-value numerical conditions under behavior=any.
+    """Parametrize threshold cases for state-value numerical conditions.
 
-    Generates state sequences for a condition that reads its tracked value
-    directly from `state.state` (e.g. a sensor with a temperature device
+    Uses behavior=any. Generates state sequences for a condition
+    that reads its tracked value directly from `state.state`
+    (e.g. a sensor with a temperature device
     class). The condition is exercised across three threshold types in turn
     — "above", "below", "between" — and for each, the helper invokes
     `parametrize_condition_states_any` with target/other states populated
@@ -2033,7 +2039,9 @@ def parametrize_numerical_condition_above_below_all(
     threshold_unit: str | None | UndefinedType = UNDEFINED,
     unit_attributes: dict | None = None,
 ) -> list[tuple[str, dict[str, Any], list[ConditionStateDescription]]]:
-    """Parametrize above/below/between threshold cases for state-value numerical conditions under behavior=all.
+    """Parametrize threshold cases for state-value numerical conditions.
+
+    Uses behavior=all.
 
     See `parametrize_numerical_condition_above_below_any` for the structure
     of the generated test cases; the only difference is that this helper
@@ -2153,10 +2161,11 @@ def parametrize_numerical_attribute_condition_above_below_any(
     attribute_required: bool = False,
     attribute_value_scale: float = 1.0,
 ) -> list[tuple[str, dict[str, Any], list[ConditionStateDescription]]]:
-    """Parametrize above/below/between threshold cases for attribute-based numerical conditions under behavior=any.
+    """Parametrize threshold cases for attribute-based numerical conditions.
 
-    Generates state sequences for a condition that reads its tracked value
-    from a state attribute (e.g. `climate.target_humidity`). The condition
+    Uses behavior=any. Generates state sequences for a condition
+    that reads its tracked value from a state attribute
+    (e.g. `climate.target_humidity`). The condition
     is exercised across three threshold types in turn — "above", "below",
     "between" — and for each, the helper invokes
     `parametrize_condition_states_any` with target/other states populated
@@ -2300,7 +2309,9 @@ def parametrize_numerical_attribute_condition_above_below_all(
     attribute_required: bool = False,
     attribute_value_scale: float = 1.0,
 ) -> list[tuple[str, dict[str, Any], list[ConditionStateDescription]]]:
-    """Parametrize above/below/between threshold cases for attribute-based numerical conditions under behavior=all.
+    """Parametrize threshold cases for attribute-based numerical conditions.
+
+    Uses behavior=all.
 
     See `parametrize_numerical_attribute_condition_above_below_any` for the
     structure of the generated test cases; the only difference is that this
diff --git a/tests/components/compit/test_binary_sensor.py b/tests/components/compit/test_binary_sensor.py
index 2a393f55c202..c4b982ca0cfc 100644
--- a/tests/components/compit/test_binary_sensor.py
+++ b/tests/components/compit/test_binary_sensor.py
@@ -22,7 +22,7 @@ async def test_binary_sensor_entities_snapshot(
     mock_connector: MagicMock,
     snapshot: SnapshotAssertion,
 ) -> None:
-    """Snapshot test for binary sensor entities creation, unique IDs, and device info."""
+    """Snapshot test for binary sensor entity creation."""
     await setup_integration(hass, mock_config_entry)
 
     snapshot_compit_entities(hass, entity_registry, snapshot, Platform.BINARY_SENSOR)
diff --git a/tests/components/compit/test_config_flow.py b/tests/components/compit/test_config_flow.py
index 48086f6e1073..2fe96dd752e2 100644
--- a/tests/components/compit/test_config_flow.py
+++ b/tests/components/compit/test_config_flow.py
@@ -57,7 +57,7 @@ async def test_async_step_user_failed_auth(
     mock_compit_api: AsyncMock,
     mock_setup_entry: AsyncMock,
 ) -> None:
-    """Test user step with invalid authentication then success after error is cleared."""
+    """Test user step with invalid auth then success."""
     mock_compit_api.side_effect = [exception, True]
 
     result = await hass.config_entries.flow.async_init(
@@ -129,7 +129,7 @@ async def test_async_step_reauth_confirm_failed_auth(
     mock_compit_api: AsyncMock,
     mock_setup_entry: AsyncMock,
 ) -> None:
-    """Test reauth confirm step with invalid authentication then success after error is cleared."""
+    """Test reauth confirm step with invalid auth then success."""
     mock_compit_api.side_effect = [exception, True]
 
     mock_config_entry.add_to_hass(hass)
diff --git a/tests/components/compit/test_number.py b/tests/components/compit/test_number.py
index 60a068542aa6..49120d24a4fa 100644
--- a/tests/components/compit/test_number.py
+++ b/tests/components/compit/test_number.py
@@ -42,7 +42,7 @@ async def test_number_unknown_device_parameters(
     mock_connector: MagicMock,
     mock_return_value: Any,
 ) -> None:
-    """Test that number entity shows unknown when get_parameter_value returns invalid values."""
+    """Test number entity shows unknown for invalid values."""
 
     mock_connector.get_current_value.side_effect = lambda device_id, parameter_code: (
         mock_return_value
diff --git a/tests/components/compit/test_select.py b/tests/components/compit/test_select.py
index 88cb4bddac8f..4764c010d346 100644
--- a/tests/components/compit/test_select.py
+++ b/tests/components/compit/test_select.py
@@ -44,7 +44,7 @@ async def test_select_unknown_device_parameters(
     mock_connector: MagicMock,
     mock_return_value: Any,
 ) -> None:
-    """Test that select entity shows unknown when get_current_option returns various invalid values."""
+    """Test select entity shows unknown for invalid values."""
     mock_connector.get_current_option.side_effect = lambda device_id, parameter_code: (
         mock_return_value
     )
diff --git a/tests/components/compit/test_sensor.py b/tests/components/compit/test_sensor.py
index 0996842203df..3e9b7019ada7 100644
--- a/tests/components/compit/test_sensor.py
+++ b/tests/components/compit/test_sensor.py
@@ -42,7 +42,7 @@ async def test_sensor_return_value_enum_sensor(
     mock_return_value: Any | None,
     test_description: str,
 ) -> None:
-    """Test that sensor entity shows unknown when get_current_option returns various invalid values."""
+    """Test sensor entity shows unknown for invalid values."""
     mock_connector.get_current_value.side_effect = lambda device_id, parameter_code: (
         mock_return_value
     )
@@ -59,7 +59,7 @@ async def test_sensor_enum_value_cannot_return_number(
     mock_config_entry: MockConfigEntry,
     mock_connector: MagicMock,
 ) -> None:
-    """Test that sensor entity shows unknown when get_current_option returns various invalid values."""
+    """Test sensor entity shows unknown for invalid values."""
     mock_connector.get_current_value.side_effect = lambda device_id, parameter_code: (
         123  # Invalid enum value
     )
@@ -102,7 +102,7 @@ async def test_sensor_number_value_cannot_return_enum(
     mock_config_entry: MockConfigEntry,
     mock_connector: MagicMock,
 ) -> None:
-    """Test that sensor entity shows unknown when get_current_value returns enum instead of number."""
+    """Test sensor shows unknown when value is an enum, not a number."""
     mock_connector.get_current_value.side_effect = lambda device_id, parameter_code: (
         "eco"  # Invalid number value
     )
diff --git a/tests/components/compit/test_water_heater.py b/tests/components/compit/test_water_heater.py
index 38140600b0df..549e212e222d 100644
--- a/tests/components/compit/test_water_heater.py
+++ b/tests/components/compit/test_water_heater.py
@@ -43,7 +43,7 @@ async def test_water_heater_unknown_temperature(
     mock_connector: MagicMock,
     mock_return_value: Any,
 ) -> None:
-    """Test that water heater shows unknown temperature when get_current_value returns invalid values."""
+    """Test water heater shows unknown temp for invalid values."""
     mock_connector.get_current_value.side_effect = lambda device_id, parameter_code: (
         mock_return_value
     )
diff --git a/tests/components/config/test_config_entries.py b/tests/components/config/test_config_entries.py
index 1587b2402fd9..ded5e6f80624 100644
--- a/tests/components/config/test_config_entries.py
+++ b/tests/components/config/test_config_entries.py
@@ -455,7 +455,8 @@ async def test_initialize_flow_unmet_dependency(
     mock_integration(
         hass, MockModule(domain="dependency_1", config_schema=config_schema)
     )
-    # The test2 config flow should  fail because dependency_1 can't be automatically setup
+    # The test2 config flow should fail because
+    # dependency_1 can't be automatically set up
     mock_integration(
         hass,
         MockModule(domain="test2", partial_manifest={"dependencies": ["dependency_1"]}),
@@ -3303,7 +3304,7 @@ async def test_flow_with_multiple_schema_errors(
 async def test_flow_with_multiple_schema_errors_base(
     hass: HomeAssistant, client: TestClient
 ) -> None:
-    """Test an config flow with multiple schema errors where fields are not in the schema."""
+    """Test config flow with multiple schema errors."""
     mock_integration(
         hass, MockModule("test", async_setup_entry=AsyncMock(return_value=True))
     )
diff --git a/tests/components/config/test_device_registry.py b/tests/components/config/test_device_registry.py
index b9b04bb396cb..2d11952bc065 100644
--- a/tests/components/config/test_device_registry.py
+++ b/tests/components/config/test_device_registry.py
@@ -470,7 +470,10 @@ async def test_remove_config_entry_from_device_if_integration_remove(
     hass_ws_client: WebSocketGenerator,
     device_registry: dr.DeviceRegistry,
 ) -> None:
-    """Test removing config entry from device doesn't lead to an error when the integration removes the entry."""
+    """Test removing config entry from device.
+
+    Should not error when the integration removes the entry.
+    """
     assert await async_setup_component(hass, "config", {})
     ws_client = await hass_ws_client(hass)
 
diff --git a/tests/components/conftest.py b/tests/components/conftest.py
index 3e4a9199ba96..501c626cfa9b 100644
--- a/tests/components/conftest.py
+++ b/tests/components/conftest.py
@@ -109,7 +109,7 @@ RE_REQUEST_DOMAIN = re.compile(r".*tests\/components\/([^/]+)\/.*")
 
 @pytest.fixture(scope="session", autouse=find_spec("zeroconf") is not None)
 def patch_zeroconf_multiple_catcher() -> Generator[None]:
-    """If installed, patch zeroconf wrapper that detects if multiple instances are used."""
+    """Patch zeroconf wrapper that detects multiple instances."""
     with patch(
         "homeassistant.components.zeroconf.install_multiple_zeroconf_catcher",
         side_effect=lambda zc: None,
diff --git a/tests/components/conversation/test_chat_log.py b/tests/components/conversation/test_chat_log.py
index d6856267885b..164a6aafe510 100644
--- a/tests/components/conversation/test_chat_log.py
+++ b/tests/components/conversation/test_chat_log.py
@@ -320,7 +320,11 @@ async def test_extra_systen_prompt(
     hass: HomeAssistant, mock_conversation_input: ConversationInput
 ) -> None:
     """Test that extra system prompt works."""
-    extra_system_prompt = "Garage door cover.garage_door has been left open for 30 minutes. We asked the user if they want to close it."
+    extra_system_prompt = (
+        "Garage door cover.garage_door has been left open"
+        " for 30 minutes. We asked the user if they want"
+        " to close it."
+    )
     extra_system_prompt2 = (
         "User person.paulus came home. Asked him what he wants to do."
     )
diff --git a/tests/components/conversation/test_default_agent.py b/tests/components/conversation/test_default_agent.py
index b0692b7af662..59ea0f3891e8 100644
--- a/tests/components/conversation/test_default_agent.py
+++ b/tests/components/conversation/test_default_agent.py
@@ -738,7 +738,8 @@ async def test_error_no_device_in_area(
     assert result.response.error_code == intent.IntentResponseErrorCode.NO_VALID_TARGETS
     assert (
         result.response.speech["plain"]["speech"]
-        == "Sorry, I am not aware of any device called missing entity in the kitchen area"
+        == "Sorry, I am not aware of any device called"
+        " missing entity in the kitchen area"
     )
 
 
@@ -889,7 +890,7 @@ async def test_error_no_domain(hass: HomeAssistant) -> None:
 
 @pytest.mark.usefixtures("init_components")
 async def test_error_no_domain_exposed(hass: HomeAssistant) -> None:
-    """Test error message when devices/entities exist for a domain but are not exposed."""
+    """Test error when entities exist but are not exposed."""
     hass.states.async_set("fan.test_fan", "off")
     expose_entity(hass, "fan.test_fan", False)
     await hass.async_block_till_done()
@@ -944,7 +945,7 @@ async def test_error_no_domain_in_area_exposed(
     entity_registry: er.EntityRegistry,
     area_registry: ar.AreaRegistry,
 ) -> None:
-    """Test error message when devices/entities for a domain exist in an area but are not exposed."""
+    """Test error when area entities exist but are not exposed."""
     area_kitchen = area_registry.async_get_or_create("kitchen_id")
     area_kitchen = area_registry.async_update(area_kitchen.id, name="kitchen")
 
@@ -1023,7 +1024,7 @@ async def test_error_no_domain_on_floor_exposed(
     area_registry: ar.AreaRegistry,
     floor_registry: fr.FloorRegistry,
 ) -> None:
-    """Test error message when devices/entities for a domain exist on a floor but are not exposed."""
+    """Test error when floor entities exist but are not exposed."""
     floor_ground = floor_registry.async_create("ground")
     area_kitchen = area_registry.async_get_or_create("kitchen_id")
     area_kitchen = area_registry.async_update(
@@ -1169,7 +1170,7 @@ async def test_error_no_device_class_in_area_exposed(
     entity_registry: er.EntityRegistry,
     area_registry: ar.AreaRegistry,
 ) -> None:
-    """Test error message when entities of a device class exist in an area but are not exposed."""
+    """Test error when device class entities in area are not exposed."""
     area_bedroom = area_registry.async_get_or_create("bedroom_id")
     area_bedroom = area_registry.async_update(area_bedroom.id, name="bedroom")
     bedroom_window = entity_registry.async_get_or_create("cover", "demo", "1234")
@@ -1205,7 +1206,7 @@ async def test_error_no_device_class_on_floor_exposed(
     area_registry: ar.AreaRegistry,
     floor_registry: fr.FloorRegistry,
 ) -> None:
-    """Test error message when entities of a device class exist in on a floor but are not exposed."""
+    """Test error when device class entities on floor are not exposed."""
     floor_ground = floor_registry.async_create("ground")
 
     area_bedroom = area_registry.async_get_or_create("bedroom_id")
@@ -1333,7 +1334,7 @@ async def test_error_duplicate_names(
 async def test_duplicate_names_but_one_is_exposed(
     hass: HomeAssistant, entity_registry: er.EntityRegistry
 ) -> None:
-    """Test when multiple devices have the same name (or alias), but only one of them is exposed."""
+    """Test duplicate names where only one is exposed."""
     kitchen_light_1 = entity_registry.async_get_or_create("light", "demo", "1234")
     kitchen_light_2 = entity_registry.async_get_or_create("light", "demo", "5678")
 
@@ -1371,7 +1372,7 @@ async def test_error_duplicate_names_same_area(
     area_registry: ar.AreaRegistry,
     entity_registry: er.EntityRegistry,
 ) -> None:
-    """Test error message when multiple devices have the same name (or alias) in the same area."""
+    """Test error when duplicate names exist in same area."""
     area_kitchen = area_registry.async_get_or_create("kitchen_id")
     area_kitchen = area_registry.async_update(area_kitchen.id, name="kitchen")
 
@@ -1405,7 +1406,8 @@ async def test_error_duplicate_names_same_area(
         )
         assert (
             result.response.speech["plain"]["speech"]
-            == f"Sorry, there are multiple devices called {name} in the {area_kitchen.name} area"
+            == f"Sorry, there are multiple devices called"
+            f" {name} in the {area_kitchen.name} area"
         )
 
         # question
@@ -1419,7 +1421,8 @@ async def test_error_duplicate_names_same_area(
         )
         assert (
             result.response.speech["plain"]["speech"]
-            == f"Sorry, there are multiple devices called {name} in the {area_kitchen.name} area"
+            == f"Sorry, there are multiple devices called"
+            f" {name} in the {area_kitchen.name} area"
         )
 
 
@@ -1429,7 +1432,7 @@ async def test_duplicate_names_same_area_but_one_is_exposed(
     area_registry: ar.AreaRegistry,
     entity_registry: er.EntityRegistry,
 ) -> None:
-    """Test when multiple devices have the same name (or alias) in the same area but only one is exposed."""
+    """Test duplicate names in same area with one exposed."""
     area_kitchen = area_registry.async_get_or_create("kitchen_id")
     area_kitchen = area_registry.async_update(area_kitchen.id, name="kitchen")
 
@@ -1472,7 +1475,7 @@ async def test_duplicate_names_different_areas(
     entity_registry: er.EntityRegistry,
     device_registry: dr.DeviceRegistry,
 ) -> None:
-    """Test preferred area when multiple devices have the same name (or alias) in different areas."""
+    """Test preferred area with duplicate names in different areas."""
     area_kitchen = area_registry.async_get_or_create("kitchen_id")
     area_kitchen = area_registry.async_update(area_kitchen.id, name="kitchen")
 
@@ -1594,7 +1597,7 @@ async def test_error_no_timer_support(
     area_registry: ar.AreaRegistry,
     device_registry: dr.DeviceRegistry,
 ) -> None:
-    """Test error message when a device does not support timers (no handler is registered)."""
+    """Test error when device has no timer support."""
     area_kitchen = area_registry.async_create("kitchen")
 
     entry = MockConfigEntry()
@@ -1910,7 +1913,7 @@ async def test_same_aliased_entities_in_different_areas(
     area_registry: ar.AreaRegistry,
     entity_registry: er.EntityRegistry,
 ) -> None:
-    """Test that entities with the same alias (but different names) in different areas can be targeted."""
+    """Test same-alias entities in different areas."""
     area_kitchen = area_registry.async_get_or_create("kitchen_id")
     area_kitchen = area_registry.async_update(area_kitchen.id, name="kitchen")
 
@@ -2030,7 +2033,7 @@ async def test_device_id_in_handler(hass: HomeAssistant) -> None:
 
 @pytest.mark.usefixtures("init_components")
 async def test_name_wildcard_lower_priority(hass: HomeAssistant) -> None:
-    """Test that the default agent does not prioritize a {name} slot when it's a wildcard."""
+    """Test default agent deprioritizes wildcard name slot."""
 
     class OrderBeerIntentHandler(intent.IntentHandler):
         intent_type = "OrderBeer"
@@ -2268,7 +2271,7 @@ async def test_intent_entity_remove_custom_name(
     entity_registry: er.EntityRegistry,
     snapshot: SnapshotAssertion,
 ) -> None:
-    """Test that removing a custom name allows targeting the entity by its auto-generated name again."""
+    """Test removing custom name restores auto-generated name."""
     context = Context()
     entity = MockLight("kitchen light", STATE_ON)
     entity._attr_unique_id = "1234"
@@ -2698,7 +2701,7 @@ async def test_custom_sentences_priority(
     hass_admin_user: MockUser,
     snapshot: SnapshotAssertion,
 ) -> None:
-    """Test that user intents from custom_sentences have priority over builtin intents/sentences."""
+    """Test custom_sentences have priority over builtins."""
     with tempfile.NamedTemporaryFile(
         mode="w+",
         encoding="utf-8",
@@ -2755,7 +2758,7 @@ async def test_config_sentences_priority(
     hass_admin_user: MockUser,
     snapshot: SnapshotAssertion,
 ) -> None:
-    """Test that user intents from configuration.yaml have priority over builtin intents/sentences.
+    """Test config intents have priority over builtins.
 
     Also test that they follow proper selection logic.
     """
diff --git a/tests/components/conversation/test_trigger.py b/tests/components/conversation/test_trigger.py
index b0af8a59dc22..62715ee3ffe4 100644
--- a/tests/components/conversation/test_trigger.py
+++ b/tests/components/conversation/test_trigger.py
@@ -158,7 +158,7 @@ async def test_empty_response(hass: HomeAssistant) -> None:
 async def test_response_same_sentence(
     hass: HomeAssistant, service_calls: list[ServiceCall]
 ) -> None:
-    """Test the conversation response action with multiple triggers using the same sentence."""
+    """Test conversation response with same sentence triggers."""
     assert await async_setup_component(
         hass,
         "automation",
@@ -249,7 +249,7 @@ async def test_response_same_sentence_with_error(
     hass: HomeAssistant,
     caplog: pytest.LogCaptureFixture,
 ) -> None:
-    """Test the conversation response action with multiple triggers using the same sentence and an error."""
+    """Test conversation response with same sentence and error."""
     caplog.set_level(logging.ERROR)
     assert await async_setup_component(
         hass,
@@ -300,7 +300,7 @@ async def test_response_same_sentence_with_error(
 async def test_subscribe_trigger_does_not_interfere_with_responses(
     hass: HomeAssistant, hass_ws_client: WebSocketGenerator
 ) -> None:
-    """Test that subscribing to a trigger from the websocket API does not interfere with responses."""
+    """Test trigger subscription does not interfere with responses."""
     websocket_client = await hass_ws_client()
     await websocket_client.send_json_auto_id(
         {
@@ -671,7 +671,9 @@ async def test_trigger_with_device_id(hass: HomeAssistant) -> None:
                     "command": ["test sentence"],
                 },
                 "action": {
-                    "set_conversation_response": "{{ trigger.device_id }} - {{ trigger.satellite_id }}",
+                    "set_conversation_response": (
+                        "{{ trigger.device_id }} - {{ trigger.satellite_id }}"
+                    ),
                 },
             }
         },
diff --git a/tests/components/cookidoo/test_button.py b/tests/components/cookidoo/test_button.py
index f96cbf4665db..2e1910a991d3 100644
--- a/tests/components/cookidoo/test_button.py
+++ b/tests/components/cookidoo/test_button.py
@@ -50,7 +50,9 @@ async def test_pressing_button(
         BUTTON_DOMAIN,
         SERVICE_PRESS,
         {
-            ATTR_ENTITY_ID: "button.cookidoo_clear_shopping_list_and_additional_purchases",
+            ATTR_ENTITY_ID: (
+                "button.cookidoo_clear_shopping_list_and_additional_purchases"
+            ),
         },
         blocking=True,
     )
@@ -78,7 +80,9 @@ async def test_pressing_button_exception(
             BUTTON_DOMAIN,
             SERVICE_PRESS,
             {
-                ATTR_ENTITY_ID: "button.cookidoo_clear_shopping_list_and_additional_purchases",
+                ATTR_ENTITY_ID: (
+                    "button.cookidoo_clear_shopping_list_and_additional_purchases"
+                ),
             },
             blocking=True,
         )
diff --git a/tests/components/cookidoo/test_init.py b/tests/components/cookidoo/test_init.py
index e97bf93bb213..f073b5545791 100644
--- a/tests/components/cookidoo/test_init.py
+++ b/tests/components/cookidoo/test_init.py
@@ -269,7 +269,11 @@ async def test_migration_from_with_error(
     config_entry = MockConfigEntry(
         domain=DOMAIN,
         data=config_data,
-        title=f"MIGRATION_TEST from {from_version}.{from_minor_version} with login exception '{login_exception}'",
+        title=(
+            f"MIGRATION_TEST from {from_version}."
+            f"{from_minor_version} with login"
+            f" exception '{login_exception}'"
+        ),
         version=from_version,
         minor_version=from_minor_version,
         unique_id=unique_id,
diff --git a/tests/components/coolmaster/conftest.py b/tests/components/coolmaster/conftest.py
index 2fe8c1b8bba9..c8966ffb45f9 100644
--- a/tests/components/coolmaster/conftest.py
+++ b/tests/components/coolmaster/conftest.py
@@ -273,9 +273,10 @@ async def config_entry_with_empty_status(hass: HomeAssistant) -> MockConfigEntry
 @pytest.fixture(autouse=True)
 def reset_warned_fan_speeds():
     """Reset the warned unknown fan speeds set before each test."""
-    # TODO(2026.7.0): When support for unknown fan speeds is removed, delete this fixture.
-    # This is necessary because `warned_unknown_fan_speeds` is a class variable and would persist
-    # across tests otherwise.
+    # TODO(2026.7.0): When support for unknown fan speeds
+    # is removed, delete this fixture. This is necessary
+    # because `warned_unknown_fan_speeds` is a class variable
+    # and would persist across tests otherwise.
     CoolmasterClimate.warned_unknown_fan_speeds.clear()
     yield
     CoolmasterClimate.warned_unknown_fan_speeds.clear()
diff --git a/tests/components/counter/test_trigger.py b/tests/components/counter/test_trigger.py
index 075b2ca8eb4b..994daacdcaa7 100644
--- a/tests/components/counter/test_trigger.py
+++ b/tests/components/counter/test_trigger.py
@@ -201,7 +201,7 @@ async def test_counter_state_trigger_behavior_any(
     trigger_options: dict[str, Any] | None,
     states: list[TriggerStateDescription],
 ) -> None:
-    """Test that the counter state trigger fires when any counter state changes to a specific state."""
+    """Test counter trigger fires on any state change."""
     await assert_trigger_behavior_any(
         hass,
         target_entities=target_counters,
@@ -232,7 +232,7 @@ async def test_counter_state_trigger_behavior_first(
     trigger_options: dict[str, Any],
     states: list[TriggerStateDescription],
 ) -> None:
-    """Test that the counter state trigger fires when the first counter changes to a specific state."""
+    """Test counter trigger fires on first state change."""
     await assert_trigger_behavior_first(
         hass,
         target_entities=target_counters,
@@ -263,7 +263,7 @@ async def test_counter_state_trigger_behavior_last(
     trigger_options: dict[str, Any],
     states: list[TriggerStateDescription],
 ) -> None:
-    """Test that the counter state trigger fires when the last counter changes to a specific state."""
+    """Test counter trigger fires on last state change."""
     await assert_trigger_behavior_last(
         hass,
         target_entities=target_counters,
diff --git a/tests/components/cover/test_init.py b/tests/components/cover/test_init.py
index d62ee8633b38..faecca10e24f 100644
--- a/tests/components/cover/test_init.py
+++ b/tests/components/cover/test_init.py
@@ -48,7 +48,8 @@ async def test_services(
     await call_service(hass, SERVICE_TOGGLE, ent5)
     await call_service(hass, SERVICE_TOGGLE, ent6)
 
-    # entities should be either closed or closing, depending on if they report transitional states
+    # entities should be either closed or closing,
+    # depending on if they report transitional states
     assert is_closed(hass, ent1)
     assert is_closing(hass, ent2, 50)
     assert is_closed(hass, ent3)
@@ -66,7 +67,8 @@ async def test_services(
     await call_service(hass, SERVICE_TOGGLE, ent5)
     await call_service(hass, SERVICE_TOGGLE, ent6)
 
-    # entities should be in correct state depending on the SUPPORT_STOP feature and cover position
+    # entities should be in correct state depending on
+    # the SUPPORT_STOP feature and cover position
     assert is_open(hass, ent1)
     assert is_closed(hass, ent2, 0)
     assert is_open(hass, ent3)
@@ -82,7 +84,8 @@ async def test_services(
     await call_service(hass, SERVICE_TOGGLE, ent5)
     await call_service(hass, SERVICE_TOGGLE, ent6)
 
-    # entities should be in correct state depending on the SUPPORT_STOP feature and cover position
+    # entities should be in correct state depending on
+    # the SUPPORT_STOP feature and cover position
     assert is_closed(hass, ent1)
     assert is_opening(hass, ent2, 0, closed=True)
     assert is_closed(hass, ent3)