diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 998b7d2..a84f887 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -79,7 +79,7 @@ jobs:
     - name: Install linting tools
       run: |
         python -m pip install --upgrade pip
-        pip install flake8 black isort mypy pytest
+        pip install flake8 black isort mypy pytest bandit types-aiofiles
 
     - name: Run Black (code formatting check)
       id: black
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 0630086..4343820 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -19,7 +19,7 @@ repos:
     rev: 7.3.0
     hooks:
       - id: flake8
-        args: ["--max-line-length=88", "--extend-ignore=E203,W503,E501"]
+        args: ["--max-line-length=88", "--extend-ignore=E203,W503"]
         files: ^(custom_components|tests)/.*\.py$
         
   # Type checking
diff --git a/custom_components/satcom_forecast/__init__.py b/custom_components/satcom_forecast/__init__.py
index 00baefb..ec3c329 100644
--- a/custom_components/satcom_forecast/__init__.py
+++ b/custom_components/satcom_forecast/__init__.py
@@ -27,8 +27,7 @@ async def async_migrate_entry(hass: HomeAssistant, config_entry: ConfigEntry) ->
         new = {**config_entry.data}
         if "polling_interval" not in new:
             new["polling_interval"] = 5  # Default to 5 minutes
-        hass.config_entries.async_update_entry(config_entry, data=new)
-        config_entry.version = 3
+        hass.config_entries.async_update_entry(config_entry, data=new, version=3)
         _LOGGER.debug("Migration to version 3 successful")
 
     if config_entry.version == 3:
@@ -36,8 +35,7 @@ async def async_migrate_entry(hass: HomeAssistant, config_entry: ConfigEntry) ->
         new = {**config_entry.data}
         if "imap_security" not in new:
             new["imap_security"] = "SSL"  # Default to SSL for security
-        hass.config_entries.async_update_entry(config_entry, data=new)
-        config_entry.version = 4
+        hass.config_entries.async_update_entry(config_entry, data=new, version=4)
         _LOGGER.debug("Migration to version 4 successful")
 
     return True
diff --git a/tests/test_api_cache.py b/tests/test_api_cache.py
index 2426769..78fa921 100644
--- a/tests/test_api_cache.py
+++ b/tests/test_api_cache.py
@@ -72,7 +72,8 @@ async def test_cache_eviction(cache):
 
     assert len(cache._cache) == 5
 
-    # endpoint_1 should be gone (it was inserted second, but endpoint_0 was accessed recently)
+    # endpoint_1 should be gone (it was inserted second, but endpoint_0 was accessed
+    # recently)
     # Insertion order: 0, 1, 2, 3, 4.
     # Access: 0.
     # LRU order: 1, 2, 3, 4, 0.
diff --git a/tests/test_api_compatibility.py b/tests/test_api_compatibility.py
index 13810f1..add244b 100644
--- a/tests/test_api_compatibility.py
+++ b/tests/test_api_compatibility.py
@@ -192,7 +192,9 @@ async def test_weather_event_detection_compatibility(self):
                 start_time="2024-01-01T06:00:00-05:00",
                 end_time="2024-01-01T18:00:00-05:00",
                 is_daytime=True,
-                detailed_forecast="Rain likely with a high near 70. Chance of precipitation is 80%.",
+                detailed_forecast=(
+                    "Rain likely with a high near 70. Chance of precipitation is 80%."
+                ),
             ),
             ForecastPeriod(
                 name="Tonight",
@@ -206,7 +208,9 @@ async def test_weather_event_detection_compatibility(self):
                 start_time="2024-01-02T06:00:00-05:00",
                 end_time="2024-01-02T18:00:00-05:00",
                 is_daytime=True,
-                detailed_forecast="Snow likely with a high near 30. Heavy snow possible.",
+                detailed_forecast=(
+                    "Snow likely with a high near 30. Heavy snow possible."
+                ),
             ),
         ]
 
@@ -321,7 +325,8 @@ async def test_character_count_targets(self, test_coordinates):
                 assert len(full) >= 500, f"Full length {len(full)} below minimum 500"
 
                 print(
-                    f"✓ {lat}, {lon}: Summary={len(summary)}, Compact={len(compact)}, Full={len(full)}"
+                    f"✓ {lat}, {lon}: Summary={len(summary)}, "
+                    f"Compact={len(compact)}, Full={len(full)}"
                 )
 
             except Exception as e:
@@ -365,7 +370,8 @@ async def test_days_parameter_compatibility(self):
                 assert len(api_forecast) > 50
 
                 print(
-                    f"Days {days}: HTML={len(html_forecast)} chars, API={len(api_forecast)} chars"
+                    f"Days {days}: HTML={len(html_forecast)} chars, "
+                    f"API={len(api_forecast)} chars"
                 )
 
         except Exception as e:
diff --git a/tests/test_api_data_processor.py b/tests/test_api_data_processor.py
index 9b99380..8b14a3c 100644
--- a/tests/test_api_data_processor.py
+++ b/tests/test_api_data_processor.py
@@ -33,7 +33,9 @@ def sample_api_response(self):
                         "windSpeed": "10 to 15 mph",
                         "windDirection": "NW",
                         "shortForecast": "Sunny",
-                        "detailedForecast": "Sunny with a high near 75. Northwest wind 10 to 15 mph.",
+                        "detailedForecast": (
+                            "Sunny with a high near 75. Northwest wind 10 to 15 mph."
+                        ),
                         "probabilityOfPrecipitation": {"value": 0},
                         "relativeHumidity": {"value": 45},
                         "heatIndex": None,
@@ -54,7 +56,9 @@ def sample_api_response(self):
                         "windSpeed": "5 to 10 mph",
                         "windDirection": "NW",
                         "shortForecast": "Clear",
-                        "detailedForecast": "Clear with a low around 55. Northwest wind 5 to 10 mph.",
+                        "detailedForecast": (
+                            "Clear with a low around 55. Northwest wind 5 to 10 mph."
+                        ),
                         "probabilityOfPrecipitation": {"value": 0},
                         "relativeHumidity": {"value": 60},
                         "heatIndex": None,
@@ -100,7 +104,9 @@ def test_extract_weather_events_rain(self, processor):
             start_time="2024-01-01T06:00:00-05:00",
             end_time="2024-01-01T18:00:00-05:00",
             is_daytime=True,
-            detailed_forecast="Rain likely with a high near 70. Chance of precipitation is 80%.",
+            detailed_forecast=(
+                "Rain likely with a high near 70. Chance of precipitation is 80%."
+            ),
         )
 
         events = processor.extract_weather_events(period)
diff --git a/tests/test_api_error_handler.py b/tests/test_api_error_handler.py
index 0897bf8..a1a3ab7 100644
--- a/tests/test_api_error_handler.py
+++ b/tests/test_api_error_handler.py
@@ -80,9 +80,11 @@ async def test_handle_error_retry(error_handler):
     # Second call calls retry_func again. It returns "Success".
 
     # Wait, retry_func is called inside handle_error.
-    # First call to handle_error: context.retry_count=0. Increments to 1. Calls retry_func.
+    # First call to handle_error: context.retry_count=0. Increments to 1.
+    # Calls retry_func.
     # retry_func raises. handle_error catches and recurses.
-    # Second call to handle_error: context.retry_count=1. Increments to 2. Calls retry_func.
+    # Second call to handle_error: context.retry_count=1. Increments to 2.
+    # Calls retry_func.
     # retry_func returns "Success".
 
     # So retry_func called twice.
diff --git a/tests/test_api_formatter.py b/tests/test_api_formatter.py
index 504ccf0..46b1b03 100644
--- a/tests/test_api_formatter.py
+++ b/tests/test_api_formatter.py
@@ -31,7 +31,9 @@ def sample_periods(self):
                 wind_speed="10 to 15 mph",
                 wind_direction="NW",
                 short_forecast="Sunny",
-                detailed_forecast="Sunny with a high near 75. Northwest wind 10 to 15 mph.",
+                detailed_forecast=(
+                    "Sunny with a high near 75. Northwest wind 10 to 15 mph."
+                ),
                 probability_of_precipitation=0,
             ),
             ForecastPeriod(
@@ -44,7 +46,9 @@ def sample_periods(self):
                 wind_speed="5 to 10 mph",
                 wind_direction="NW",
                 short_forecast="Clear",
-                detailed_forecast="Clear with a low around 55. Northwest wind 5 to 10 mph.",
+                detailed_forecast=(
+                    "Clear with a low around 55. Northwest wind 5 to 10 mph."
+                ),
                 probability_of_precipitation=0,
             ),
         ]
@@ -151,7 +155,9 @@ def test_detect_period_events_rain(self, formatter, sample_events):
             start_time="2024-01-01T06:00:00-05:00",
             end_time="2024-01-01T18:00:00-05:00",
             is_daytime=True,
-            detailed_forecast="Rain likely with a high near 70. Chance of precipitation is 80%.",
+            detailed_forecast=(
+                "Rain likely with a high near 70. Chance of precipitation is 80%."
+            ),
         )
 
         events = formatter._detect_period_events(period, sample_events)
@@ -347,7 +353,10 @@ def test_clean_forecast_text(self, formatter):
 
     def test_clean_forecast_for_display(self, formatter):
         """Test forecast text cleaning for display."""
-        text = "Sunny with a high near 75. Northwest wind 10 to 15 mph. Chance of precipitation is 0%."
+        text = (
+            "Sunny with a high near 75. Northwest wind 10 to 15 mph. "
+            "Chance of precipitation is 0%."
+        )
         cleaned = formatter._clean_forecast_for_display(text)
 
         # Should remove temperature and wind patterns
@@ -401,7 +410,9 @@ def test_format_compact_forecast_with_events(self, formatter):
                 temperature=75,
                 wind_speed="15 mph",
                 wind_direction="NW",
-                detailed_forecast="Rain likely with a high near 75. Northwest wind 15 mph.",
+                detailed_forecast=(
+                    "Rain likely with a high near 75. Northwest wind 15 mph."
+                ),
             )
         ]
         events = [
diff --git a/tests/test_api_integration.py b/tests/test_api_integration.py
index fe17dcc..6592a7a 100644
--- a/tests/test_api_integration.py
+++ b/tests/test_api_integration.py
@@ -85,7 +85,8 @@ async def test_get_forecast_real_api(self, client):
         assert "isDaytime" in first_period
 
         print(
-            f"Retrieved forecast with {len(forecast_data['properties']['periods'])} periods"
+            f"Retrieved forecast with {len(forecast_data['properties']['periods'])} "
+            f"periods"
         )
 
     @pytest.mark.asyncio
@@ -245,8 +246,10 @@ async def test_caching_functionality(self, fetcher):
 
         assert forecast1 == forecast2  # Should be identical
 
-        # Only assert timing if first call took significant time (indicating network request)
-        # If first call was extremely fast (< 10ms), it might have been cached externally or mocked
+        # Only assert timing if first call took significant time (indicating network
+        # request)
+        # If first call was extremely fast (< 10ms), it might have been cached
+        # externally or mocked
         if first_call_time > 0.01:
             assert second_call_time < first_call_time  # Should be faster
 
diff --git a/tests/test_compact_format.py b/tests/test_compact_format.py
index 0d2f55b..2c84f92 100644
--- a/tests/test_compact_format.py
+++ b/tests/test_compact_format.py
@@ -33,25 +33,35 @@ class TestCompactFormat:
     @pytest.mark.skipif(not HAS_HA, reason="Home Assistant not available")
     def test_compact_format_newlines(self):
         """Test that compact format preserves newlines between days."""
-        sample_forecast = """Tonight: Rain showers likely, mainly before 7am. Low around 52. Southeast wind 5 mph. Chance of precipitation is 80%.
-Showers likely, mainly before 7am.
-Tuesday: Rain showers likely, mainly before 7am. High near 64. Southeast wind 5 mph. Chance of precipitation is 60%.
-Showers likely, mainly before 7am
-Tuesday Night: Partly cloudy, with a low around 47. West wind 5 mph.
-Wednesday: Partly sunny, with a high near 63. East wind 5 mph.
-Wednesday Night: A chance of rain between 10pm and 1am. Low around 52. Southeast wind 5 to 10 mph. Chance of precipitation is 30%.
-A chance of rain between 10pm and 1am
-Thursday: A chance of rain between 7am and 1pm. High near 62. West wind 5 mph. Chance of precipitation is 30%.
-A chance of rain between 7am and 1pm
-Thursday Night: Mostly cloudy, with a low around 49.
-Friday: A chance of rain after 10am. High near 65. Chance of precipitation is 30%.
-A chance of rain after 10am
-Friday Night: A chance of rain. Low around 50. Chance of precipitation is 30%.
-A chance of rain
-Saturday: A chance of rain. High near 63. Chance of precipitation is 30%.
-A chance of rain
-Saturday Night: A chance of rain. Low around 50. Chance of precipitation is 30%.
-A chance of rain"""
+        sample_forecast = (
+            "Tonight: Rain showers likely, mainly before 7am. Low around 52. "
+            "Southeast wind 5 mph. Chance of precipitation is 80%.\n"
+            "Showers likely, mainly before 7am.\n"
+            "Tuesday: Rain showers likely, mainly before 7am. High near 64. "
+            "Southeast wind 5 mph. Chance of precipitation is 60%.\n"
+            "Showers likely, mainly before 7am\n"
+            "Tuesday Night: Partly cloudy, with a low around 47. West wind 5 mph.\n"
+            "Wednesday: Partly sunny, with a high near 63. East wind 5 mph.\n"
+            "Wednesday Night: A chance of rain between 10pm and 1am. Low around 52. "
+            "Southeast wind 5 to 10 mph. Chance of precipitation is 30%.\n"
+            "A chance of rain between 10pm and 1am\n"
+            "Thursday: A chance of rain between 7am and 1pm. High near 62. "
+            "West wind 5 mph. Chance of precipitation is 30%.\n"
+            "A chance of rain between 7am and 1pm\n"
+            "Thursday Night: Mostly cloudy, with a low around 49.\n"
+            "Friday: A chance of rain after 10am. High near 65. "
+            "Chance of precipitation is 30%.\n"
+            "A chance of rain after 10am\n"
+            "Friday Night: A chance of rain. Low around 50. "
+            "Chance of precipitation is 30%.\n"
+            "A chance of rain\n"
+            "Saturday: A chance of rain. High near 63. "
+            "Chance of precipitation is 30%.\n"
+            "A chance of rain\n"
+            "Saturday Night: A chance of rain. Low around 50. "
+            "Chance of precipitation is 30%.\n"
+            "A chance of rain"
+        )
 
         # Format the compact forecast
         compact_result = format_compact_forecast(sample_forecast)
@@ -88,9 +98,15 @@ def test_compact_format_newlines(self):
 
     @pytest.mark.skipif(not HAS_HA, reason="Home Assistant not available")
     def test_compact_format_no_pipe_separators(self):
-        """Test that compact format doesn't use pipe separators that would trigger summary format detection."""
-        sample_forecast = """Tonight: Rain showers likely, mainly before 7am. Low around 52. Southeast wind 5 mph. Chance of precipitation is 80%.
-Tuesday: Rain showers likely, mainly before 7am. High near 64. Southeast wind 5 mph. Chance of precipitation is 60%."""
+        """Test that compact format doesn't use pipe separators that would
+        trigger summary format detection.
+        """
+        sample_forecast = (
+            "Tonight: Rain showers likely, mainly before 7am. Low around 52. "
+            "Southeast wind 5 mph. Chance of precipitation is 80%.\n"
+            "Tuesday: Rain showers likely, mainly before 7am. High near 64. "
+            "Southeast wind 5 mph. Chance of precipitation is 60%."
+        )
 
         # Format the compact forecast
         compact_result = format_compact_forecast(sample_forecast)
@@ -107,11 +123,17 @@ def test_compact_format_no_pipe_separators(self):
 
     @pytest.mark.skipif(not HAS_HA, reason="Home Assistant not available")
     def test_compact_format_splitting(self):
-        """Test that compact format is correctly detected and split by the split_message function."""
-        sample_forecast = """Tonight: Rain showers likely, mainly before 7am. Low around 52. Southeast wind 5 mph. Chance of precipitation is 80%.
-Tuesday: Rain showers likely, mainly before 7am. High near 64. Southeast wind 5 mph. Chance of precipitation is 60%.
-Tuesday Night: Partly cloudy, with a low around 47. West wind 5 mph.
-Wednesday: Partly sunny, with a high near 63. East wind 5 mph."""
+        """Test that compact format is correctly detected and split by the
+        split_message function.
+        """
+        sample_forecast = (
+            "Tonight: Rain showers likely, mainly before 7am. Low around 52. "
+            "Southeast wind 5 mph. Chance of precipitation is 80%.\n"
+            "Tuesday: Rain showers likely, mainly before 7am. High near 64. "
+            "Southeast wind 5 mph. Chance of precipitation is 60%.\n"
+            "Tuesday Night: Partly cloudy, with a low around 47. West wind 5 mph.\n"
+            "Wednesday: Partly sunny, with a high near 63. East wind 5 mph."
+        )
 
         # Format the compact forecast
         compact_result = format_compact_forecast(sample_forecast)
@@ -159,9 +181,13 @@ def test_compact_format_splitting(self):
     @pytest.mark.skipif(not HAS_HA, reason="Home Assistant not available")
     def test_compact_format_day_separation(self):
         """Test that days are properly separated and don't run together."""
-        sample_forecast = """Tonight: Rain showers likely, mainly before 7am. Low around 52. Southeast wind 5 mph. Chance of precipitation is 80%.
-Tuesday: Rain showers likely, mainly before 7am. High near 64. Southeast wind 5 mph. Chance of precipitation is 60%.
-Tuesday Night: Partly cloudy, with a low around 47. West wind 5 mph."""
+        sample_forecast = (
+            "Tonight: Rain showers likely, mainly before 7am. Low around 52. "
+            "Southeast wind 5 mph. Chance of precipitation is 80%.\n"
+            "Tuesday: Rain showers likely, mainly before 7am. High near 64. "
+            "Southeast wind 5 mph. Chance of precipitation is 60%.\n"
+            "Tuesday Night: Partly cloudy, with a low around 47. West wind 5 mph."
+        )
 
         # Format the compact forecast
         compact_result = format_compact_forecast(sample_forecast)
diff --git a/tests/test_config_flow.py b/tests/test_config_flow.py
index 60fd495..76495dc 100644
--- a/tests/test_config_flow.py
+++ b/tests/test_config_flow.py
@@ -302,13 +302,15 @@ async def test_options_flow_update(mock_hass, mock_config_entry):
         "imap_folder": "INBOX",
     }
 
-    # Mock validate_imap_folder (since folder didn't change, it shouldn't be called, but just in case)
+    # Mock validate_imap_folder (since folder didn't change, it shouldn't be called,
+    # but just in case)
     mock_hass.async_add_executor_job.return_value = (True, None)
 
     # Since we are using MockConfigFlow, async_create_entry is already defined there
     # But we need to mock async_reload_entry import inside the method
     # The method does: from . import async_reload_entry
-    # We can mock sys.modules['custom_components.satcom_forecast'] to have async_reload_entry
+    # We can mock sys.modules['custom_components.satcom_forecast'] to have
+    # async_reload_entry
 
     async def mock_reload(*args, **kwargs):
         pass
diff --git a/tests/test_forecast_parser.py b/tests/test_forecast_parser.py
index cd0fe2e..595f45b 100644
--- a/tests/test_forecast_parser.py
+++ b/tests/test_forecast_parser.py
@@ -11,19 +11,30 @@
 )
 from forecast_parser import format_forecast, summarize_forecast  # noqa: E402
 
-TEST_FORECAST = """This Afternoon: A chance of showers. Mostly cloudy, with a high near 50. Southeast wind around 10 mph. Chance of precipitation is 40%.
-Tonight: Showers likely, mainly between 7pm and 10pm, then rain after 10pm. Low around 41. Southeast wind around 15 mph. Chance of precipitation is 80%.
-Thursday: Rain likely. Cloudy, with a high near 49. Southeast wind 10 to 15 mph. Chance of precipitation is 70%.
-Thursday Night: Rain likely, mainly before 10pm. Cloudy, with a low around 41. Southeast wind 5 to 15 mph. Chance of precipitation is 60%.
-Friday: Rain likely, mainly between 10am and 1pm. Cloudy, with a high near 51. Southeast wind around 10 mph. Chance of precipitation is 60%.
-Friday Night: A chance of rain before 7pm, then scattered showers after 7pm. Cloudy, with a low around 43. Southeast wind around 10 mph. Chance of precipitation is 50%.
-Saturday: Scattered showers before 10am, then a chance of rain after 10am. Cloudy, with a high near 52. Chance of precipitation is 30%.
-Saturday Night: A chance of rain. Cloudy, with a low around 43.
-Sunday: A chance of rain. Cloudy, with a high near 52.
-Sunday Night: A chance of rain. Cloudy, with a low around 43.
-Monday: A chance of rain. Mostly cloudy, with a high near 54.
-Monday Night: A chance of rain. Mostly cloudy, with a low around 44.
-Tuesday: A chance of rain. Mostly cloudy, with a high near 56."""
+TEST_FORECAST = (
+    "This Afternoon: A chance of showers. Mostly cloudy, with a high near 50. "
+    "Southeast wind around 10 mph. Chance of precipitation is 40%.\n"
+    "Tonight: Showers likely, mainly between 7pm and 10pm, then rain after 10pm. "
+    "Low around 41. Southeast wind around 15 mph. "
+    "Chance of precipitation is 80%.\n"
+    "Thursday: Rain likely. Cloudy, with a high near 49. "
+    "Southeast wind 10 to 15 mph. Chance of precipitation is 70%.\n"
+    "Thursday Night: Rain likely, mainly before 10pm. Cloudy, with a low "
+    "around 41. Southeast wind 5 to 15 mph. Chance of precipitation is 60%.\n"
+    "Friday: Rain likely, mainly between 10am and 1pm. Cloudy, with a high "
+    "near 51. Southeast wind around 10 mph. Chance of precipitation is 60%.\n"
+    "Friday Night: A chance of rain before 7pm, then scattered showers after 7pm. "
+    "Cloudy, with a low around 43. Southeast wind around 10 mph. "
+    "Chance of precipitation is 50%.\n"
+    "Saturday: Scattered showers before 10am, then a chance of rain after 10am. "
+    "Cloudy, with a high near 52. Chance of precipitation is 30%.\n"
+    "Saturday Night: A chance of rain. Cloudy, with a low around 43.\n"
+    "Sunday: A chance of rain. Cloudy, with a high near 52.\n"
+    "Sunday Night: A chance of rain. Cloudy, with a low around 43.\n"
+    "Monday: A chance of rain. Mostly cloudy, with a high near 54.\n"
+    "Monday Night: A chance of rain. Mostly cloudy, with a low around 44.\n"
+    "Tuesday: A chance of rain. Mostly cloudy, with a high near 56."
+)
 
 
 class TestForecastParser:
@@ -40,8 +51,11 @@ def test_basic_formats(self) -> None:
 
     def test_smoke_conditions(self) -> None:
         """Test smoke detection and labeling."""
-        smoke_forecast = """This Afternoon: Widespread haze. Mostly cloudy, with a high near 50. Southeast wind around 10 mph.
-Tonight: Widespread haze. Low around 41. Southeast wind around 15 mph."""
+        smoke_forecast = (
+            "This Afternoon: Widespread haze. Mostly cloudy, with a high near 50. "
+            "Southeast wind around 10 mph.\n"
+            "Tonight: Widespread haze. Low around 41. Southeast wind around 15 mph."
+        )
         areas_smoke_forecast = (
             "This Afternoon: Areas of smoke. Mostly sunny, with a high near 70."
         )
@@ -56,8 +70,13 @@ def test_smoke_conditions(self) -> None:
 
     def test_explicit_percentages(self) -> None:
         """Test explicit percentage handling."""
-        explicit_forecast = """This Afternoon: A chance of showers. Mostly cloudy, with a high near 50. Southeast wind around 10 mph. Chance of precipitation is 40%.
-Tonight: Showers likely, mainly between 7pm and 10pm, then rain after 10pm. Low around 41. Southeast wind around 15 mph. Chance of precipitation is 80%."""
+        explicit_forecast = (
+            "This Afternoon: A chance of showers. Mostly cloudy, with a high near 50. "
+            "Southeast wind around 10 mph. Chance of precipitation is 40%.\n"
+            "Tonight: Showers likely, mainly between 7pm and 10pm, then rain after "
+            "10pm. Low around 41. Southeast wind around 15 mph. "
+            "Chance of precipitation is 80%."
+        )
 
         compact_result = format_forecast(explicit_forecast, mode="compact")
         summary_result = format_forecast(explicit_forecast, mode="summary")
@@ -68,8 +87,14 @@ def test_explicit_percentages(self) -> None:
 
     def test_smoke_with_precipitation(self) -> None:
         """Test that smoke and precipitation don't share percentages."""
-        test_text = """This Afternoon: Scattered showers. Areas of smoke. Mostly cloudy, with a high near 67. South wind around 5 mph. Chance of precipitation is 40%.
-Tonight: Showers, mainly before 1am, then rain after 1am. Areas of smoke. Mostly cloudy, with a low around 57. Southeast wind around 5 mph. Chance of precipitation is 80%."""
+        test_text = (
+            "This Afternoon: Scattered showers. Areas of smoke. Mostly cloudy, "
+            "with a high near 67. South wind around 5 mph. "
+            "Chance of precipitation is 40%.\n"
+            "Tonight: Showers, mainly before 1am, then rain after 1am. "
+            "Areas of smoke. Mostly cloudy, with a low around 57. "
+            "Southeast wind around 5 mph. Chance of precipitation is 80%."
+        )
 
         compact_result = format_forecast(test_text, mode="compact")
         summary_result = format_forecast(test_text, mode="summary")
@@ -118,10 +143,16 @@ def test_weather_event_detection(
 
     def test_temperature_wind_extraction(self) -> None:
         """Test temperature and wind information extraction."""
-        temp_wind_forecast = """Tonight: A chance of rain. Mostly cloudy, with a low around 46. Southeast wind 5 to 10 mph. Chance of precipitation is 30%.
-Wednesday: Rain likely. Cloudy, with a high near 61. Southeast wind 5 to 10 mph. Chance of precipitation is 70%.
-Wednesday Night: Rain. Cloudy, with a low around 45. East wind around 15 mph. Chance of precipitation is 80%.
-Thursday: Rain. Cloudy, with a high near 61. East wind 5 to 10 mph. Chance of precipitation is 90%."""
+        temp_wind_forecast = (
+            "Tonight: A chance of rain. Mostly cloudy, with a low around 46. "
+            "Southeast wind 5 to 10 mph. Chance of precipitation is 30%.\n"
+            "Wednesday: Rain likely. Cloudy, with a high near 61. "
+            "Southeast wind 5 to 10 mph. Chance of precipitation is 70%.\n"
+            "Wednesday Night: Rain. Cloudy, with a low around 45. "
+            "East wind around 15 mph. Chance of precipitation is 80%.\n"
+            "Thursday: Rain. Cloudy, with a high near 61. East wind 5 to 10 mph. "
+            "Chance of precipitation is 90%."
+        )
 
         summary = summarize_forecast(temp_wind_forecast)
 
@@ -163,34 +194,61 @@ def test_smoke_probability_levels(self) -> None:
 
     def test_summary_with_temp_wind(self) -> None:
         """Test summary format with temperature and wind information."""
-        sample_text = """
-Tonight: A chance of rain. Mostly cloudy, with a low around 46. Southeast wind 5 to 10 mph. Chance of precipitation is 30%.
-Wednesday: Rain likely. Cloudy, with a high near 61. Southeast wind 5 to 10 mph. Chance of precipitation is 70%.
-Wednesday Night: Rain. Cloudy, with a low around 45. East wind around 15 mph. Chance of precipitation is 80%.
-Thursday: Rain. Cloudy, with a high near 61. East wind 5 to 10 mph. Chance of precipitation is 90%.
-"""
+        sample_text = (
+            "\n"
+            "Tonight: A chance of rain. Mostly cloudy, with a low around 46. "
+            "Southeast wind 5 to 10 mph. Chance of precipitation is 30%.\n"
+            "Wednesday: Rain likely. Cloudy, with a high near 61. "
+            "Southeast wind 5 to 10 mph. Chance of precipitation is 70%.\n"
+            "Wednesday Night: Rain. Cloudy, with a low around 45. "
+            "East wind around 15 mph. Chance of precipitation is 80%.\n"
+            "Thursday: Rain. Cloudy, with a high near 61. East wind 5 to 10 mph. "
+            "Chance of precipitation is 90%.\n"
+        )
         summary = summarize_forecast(sample_text)
-        expected_summary = "Tngt: Rn(30%),L:46°,SE5-10mph\nWed: Rn(80%),H:61°,SE5-10mph,L:45°,E15mph\nThu: Rn(90%),H:61°,E5-10mph"  # Updated to include spaces after colons
+        expected_summary = (
+            "Tngt: Rn(30%),L:46°,SE5-10mph\n"
+            "Wed: Rn(80%),H:61°,SE5-10mph,L:45°,E15mph\n"
+            "Thu: Rn(90%),H:61°,E5-10mph"
+        )
         assert summary == expected_summary
 
     def test_real_world_summary(self) -> None:
         """Test a real-world forecast scenario."""
-        real_forecast_text = """
-Tonight: Mostly cloudy, with a low around 46. Light and variable wind becoming southeast 5 to 10 mph in the evening.
-Wednesday: A slight chance of showers after 4pm. Mostly cloudy, with a high near 61. Northwest wind around 5 mph.
-Wednesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 45. Southeast wind around 15 mph.
-Thursday: A 30 percent chance of rain. Mostly cloudy, with a high near 61. Southeast wind 5 to 10 mph.
-Thursday Night: A 20 percent chance of rain. Mostly cloudy, with a low around 47. East wind around 10 mph. Breezy.
-Friday: A 20 percent chance of rain. Mostly cloudy, with a high near 62. Northeast wind around 5 mph.
-Friday Night: Mostly cloudy, with a low around 48.
-Saturday: Partly sunny, with a high near 64.
-Saturday Night: Mostly cloudy, with a low around 48.
-Sunday: A 30 percent chance of rain. Mostly cloudy, with a high near 61.
-Sunday Night: A 20 percent chance of rain. Mostly cloudy, with a low around 47.
-Monday: A 30 percent chance of rain. Mostly cloudy, with a high near 61.
-"""
+        real_forecast_text = (
+            "\n"
+            "Tonight: Mostly cloudy, with a low around 46. Light and variable wind "
+            "becoming southeast 5 to 10 mph in the evening.\n"
+            "Wednesday: A slight chance of showers after 4pm. Mostly cloudy, "
+            "with a high near 61. Northwest wind around 5 mph.\n"
+            "Wednesday Night: A 20 percent chance of showers. Mostly cloudy, "
+            "with a low around 45. Southeast wind around 15 mph.\n"
+            "Thursday: A 30 percent chance of rain. Mostly cloudy, "
+            "with a high near 61. Southeast wind 5 to 10 mph.\n"
+            "Thursday Night: A 20 percent chance of rain. Mostly cloudy, "
+            "with a low around 47. East wind around 10 mph. Breezy.\n"
+            "Friday: A 20 percent chance of rain. Mostly cloudy, "
+            "with a high near 62. Northeast wind around 5 mph.\n"
+            "Friday Night: Mostly cloudy, with a low around 48.\n"
+            "Saturday: Partly sunny, with a high near 64.\n"
+            "Saturday Night: Mostly cloudy, with a low around 48.\n"
+            "Sunday: A 30 percent chance of rain. Mostly cloudy, "
+            "with a high near 61.\n"
+            "Sunday Night: A 20 percent chance of rain. Mostly cloudy, "
+            "with a low around 47.\n"
+            "Monday: A 30 percent chance of rain. Mostly cloudy, "
+            "with a high near 61.\n"
+        )
         summary = summarize_forecast(real_forecast_text)
-        expected_summary = "Tngt: L:46°,SE5-10mph\nWed: Rn(30%),H:61°,NW5mph,L:45°,SE15mph\nThu: Rn(30%),H:61°,SE5-10mph,L:47°,E10mph\nFri: Rn(20%),H:62°,NE5mph,L:48°\nSat: H:64°,L:48°\nSun: Rn(30%),H:61°,L:47°\nMon: Rn(30%),H:61°"
+        expected_summary = (
+            "Tngt: L:46°,SE5-10mph\n"
+            "Wed: Rn(30%),H:61°,NW5mph,L:45°,SE15mph\n"
+            "Thu: Rn(30%),H:61°,SE5-10mph,L:47°,E10mph\n"
+            "Fri: Rn(20%),H:62°,NE5mph,L:48°\n"
+            "Sat: H:64°,L:48°\n"
+            "Sun: Rn(30%),H:61°,L:47°\n"
+            "Mon: Rn(30%),H:61°"
+        )
         # Since Tngt is the first period and it's night, it stays as Tngt.
         # Wed + Wed Night -> Wed
         # Thu + Thu Night -> Thu
@@ -203,10 +261,14 @@ def test_real_world_summary(self) -> None:
         # "Wed: Rn(30%),H:61°,NW5mph,L:45°,SE15mph" -> This has H and L.
         # "Thu: Rn(30%),H:61°,SE5-10mph,L:47°,E10mph" -> This has H and L.
 
-        # The failure was: assert 'Tngt: L:46°,...Rn(30%),H:61°' == 'Tngt: L:46°,...Rn(30%),H:61°'
+        # The failure was: assert 'Tngt: L:46°,...Rn(30%),H:61°' == 'Tngt: L:46°,'
+        # '...Rn(30%),H:61°'
         # Wait, the failure message showed identical strings?
-        # FAILED tests/test_forecast_parser.py::TestForecastParser::test_real_world_summary - AssertionError: assert 'Tngt: L:46°,...Rn(30%),H:61°' == 'Tngt: L:46°,...Rn(30%),H:61°'
-        # This usually means there's a subtle difference (whitespace, invisible char, or order).
+        # FAILED tests/test_forecast_parser.py::TestForecastParser::
+        # test_real_world_summary - AssertionError: assert 'Tngt: L:46°,...
+        # Rn(30%),H:61°' == 'Tngt: L:46°,...Rn(30%),H:61°'
+        # This usually means there's a subtle difference (whitespace, invisible char,
+        # or order).
         # Let's re-verify the expected string carefully.
 
         # In the actual output (from reproduction script):
@@ -222,21 +284,25 @@ def test_real_world_summary(self) -> None:
         # Tngt: L:46°,SE5-10mph
         # Wed: Rn(30%),H:61°,NW5mph,L:45°,SE15mph
 
-        # I will update the expectation to be exactly what I think it should be based on the logic.
+        # I will update the expectation to be exactly what I think it should be
+        # based on the logic.
 
         assert summary == expected_summary
 
     def test_summarize_forecast_with_holidays(self) -> None:
         """Test that summarize_forecast correctly groups holidays and their nights."""
-        forecast_text = """
-Tonight: Rain likely. Low around 12. Northeast wind 5 mph.
-Wednesday: Rain likely. High near 27. Northeast wind 5 mph.
-Wednesday Night: Rain likely. Low around 26. Northeast wind 5 to 10 mph.
-Thanksgiving Day: Rain likely. High near 32. Northeast wind 10 mph.
-Thursday Night: Rain likely. Low around 29. Northeast wind 5 to 10 mph.
-Friday: Rain likely. High near 34. Northeast wind 5 to 10 mph.
-Friday Night: Rain likely. Low around 23.
-"""
+        forecast_text = (
+            "\n"
+            "Tonight: Rain likely. Low around 12. Northeast wind 5 mph.\n"
+            "Wednesday: Rain likely. High near 27. Northeast wind 5 mph.\n"
+            "Wednesday Night: Rain likely. Low around 26. "
+            "Northeast wind 5 to 10 mph.\n"
+            "Thanksgiving Day: Rain likely. High near 32. Northeast wind 10 mph.\n"
+            "Thursday Night: Rain likely. Low around 29. "
+            "Northeast wind 5 to 10 mph.\n"
+            "Friday: Rain likely. High near 34. Northeast wind 5 to 10 mph.\n"
+            "Friday Night: Rain likely. Low around 23.\n"
+        )
         summary = summarize_forecast(forecast_text)
 
         # Check that "Thanksgiving Day" (Tha) and "Thursday Night" are grouped
diff --git a/tests/test_full_format.py b/tests/test_full_format.py
index 943fee1..0f06d9e 100644
--- a/tests/test_full_format.py
+++ b/tests/test_full_format.py
@@ -33,12 +33,16 @@ class TestFullFormat:
     @pytest.mark.skipif(not HAS_HA, reason="Home Assistant not available")
     def test_full_format_complete_forecast(self):
         """Test that full format preserves complete forecast information."""
-        sample_forecast = """Tonight: Rain showers likely, mainly before 7am. Low around 52. Southeast wind 5 mph. Chance of precipitation is 80%.
-Showers likely, mainly before 7am.
-Tuesday: Rain showers likely, mainly before 7am. High near 64. Southeast wind 5 mph. Chance of precipitation is 60%.
-Showers likely, mainly before 7am
-Tuesday Night: Partly cloudy, with a low around 47. West wind 5 mph.
-Wednesday: Partly sunny, with a high near 63. East wind 5 mph."""
+        sample_forecast = (
+            "Tonight: Rain showers likely, mainly before 7am. Low around 52. "
+            "Southeast wind 5 mph. Chance of precipitation is 80%.\n"
+            "Showers likely, mainly before 7am.\n"
+            "Tuesday: Rain showers likely, mainly before 7am. High near 64. "
+            "Southeast wind 5 mph. Chance of precipitation is 60%.\n"
+            "Showers likely, mainly before 7am\n"
+            "Tuesday Night: Partly cloudy, with a low around 47. West wind 5 mph.\n"
+            "Wednesday: Partly sunny, with a high near 63. East wind 5 mph."
+        )
 
         # Format the full forecast
         full_result = format_full_forecast(sample_forecast)
@@ -62,9 +66,13 @@ def test_full_format_complete_forecast(self):
     @pytest.mark.skipif(not HAS_HA, reason="Home Assistant not available")
     def test_full_format_preserves_structure(self):
         """Test that full format preserves the original forecast structure."""
-        sample_forecast = """Tonight: Rain showers likely, mainly before 7am. Low around 52. Southeast wind 5 mph. Chance of precipitation is 80%.
-Showers likely, mainly before 7am.
-Tuesday: Rain showers likely, mainly before 7am. High near 64. Southeast wind 5 mph. Chance of precipitation is 60%."""
+        sample_forecast = (
+            "Tonight: Rain showers likely, mainly before 7am. Low around 52. "
+            "Southeast wind 5 mph. Chance of precipitation is 80%.\n"
+            "Showers likely, mainly before 7am.\n"
+            "Tuesday: Rain showers likely, mainly before 7am. High near 64. "
+            "Southeast wind 5 mph. Chance of precipitation is 60%."
+        )
 
         # Format the full forecast
         full_result = format_full_forecast(sample_forecast)
@@ -101,9 +109,15 @@ def test_full_format_preserves_structure(self):
 
     @pytest.mark.skipif(not HAS_HA, reason="Home Assistant not available")
     def test_full_format_no_abbreviations(self):
-        """Test that full format doesn't use abbreviations like compact or summary formats."""
-        sample_forecast = """Tonight: Rain showers likely, mainly before 7am. Low around 52. Southeast wind 5 mph. Chance of precipitation is 80%.
-Tuesday: Rain showers likely, mainly before 7am. High near 64. Southeast wind 5 mph. Chance of precipitation is 60%."""
+        """Test that full format doesn't use abbreviations like compact or
+        summary formats.
+        """
+        sample_forecast = (
+            "Tonight: Rain showers likely, mainly before 7am. Low around 52. "
+            "Southeast wind 5 mph. Chance of precipitation is 80%.\n"
+            "Tuesday: Rain showers likely, mainly before 7am. High near 64. "
+            "Southeast wind 5 mph. Chance of precipitation is 60%."
+        )
 
         # Format the full forecast
         full_result = format_full_forecast(sample_forecast)
@@ -131,11 +145,17 @@ def test_full_format_no_abbreviations(self):
 
     @pytest.mark.skipif(not HAS_HA, reason="Home Assistant not available")
     def test_full_format_splitting(self):
-        """Test that full format is correctly detected and split by the split_message function."""
-        sample_forecast = """Tonight: Rain showers likely, mainly before 7am. Low around 52. Southeast wind 5 mph. Chance of precipitation is 80%.
-Tuesday: Rain showers likely, mainly before 7am. High near 64. Southeast wind 5 mph. Chance of precipitation is 60%.
-Tuesday Night: Partly cloudy, with a low around 47. West wind 5 mph.
-Wednesday: Partly sunny, with a high near 63. East wind 5 mph."""
+        """Test that full format is correctly detected and split by the
+        split_message function.
+        """
+        sample_forecast = (
+            "Tonight: Rain showers likely, mainly before 7am. Low around 52. "
+            "Southeast wind 5 mph. Chance of precipitation is 80%.\n"
+            "Tuesday: Rain showers likely, mainly before 7am. High near 64. "
+            "Southeast wind 5 mph. Chance of precipitation is 60%.\n"
+            "Tuesday Night: Partly cloudy, with a low around 47. West wind 5 mph.\n"
+            "Wednesday: Partly sunny, with a high near 63. East wind 5 mph."
+        )
 
         # Format the full forecast
         full_result = format_full_forecast(sample_forecast)
@@ -182,10 +202,14 @@ def test_full_format_splitting(self):
 
     @pytest.mark.skipif(not HAS_HA, reason="Home Assistant not available")
     def test_full_format_weather_events(self):
-        """Test that full format properly includes detailed weather event information."""
-        sample_forecast = """Tonight: Rain showers likely, mainly before 7am. Low around 52. Southeast wind 5 mph. Chance of precipitation is 80%.
-Showers likely, mainly before 7am.
-Tuesday: Rain showers likely, mainly before 7am. High near 64. Southeast wind 5 mph. Chance of precipitation is 60%."""
+        """Test that full format properly includes detailed weather event info."""
+        sample_forecast = (
+            "Tonight: Rain showers likely, mainly before 7am. Low around 52. "
+            "Southeast wind 5 mph. Chance of precipitation is 80%.\n"
+            "Showers likely, mainly before 7am.\n"
+            "Tuesday: Rain showers likely, mainly before 7am. High near 64. "
+            "Southeast wind 5 mph. Chance of precipitation is 60%."
+        )
 
         # Format the full forecast
         full_result = format_full_forecast(sample_forecast)
@@ -194,8 +218,11 @@ def test_full_format_weather_events(self):
         assert (
             "Rain showers likely" in full_result
         ), "Should contain detailed precipitation information"
-        # Note: The detailed timing information might not be preserved in the current implementation
-        # assert "Showers likely, mainly before 7am" in full_result, "Should contain detailed timing information"
+        # Note: The detailed timing information might not be preserved in the current
+        # implementation
+        # assert "Showers likely, mainly before 7am" in full_result, (
+        #     "Should contain detailed timing information"
+        # )
         assert (
             "Chance of precipitation is 80%" in full_result
         ), "Should contain detailed probability information"
@@ -206,9 +233,13 @@ def test_full_format_weather_events(self):
     @pytest.mark.skipif(not HAS_HA, reason="Home Assistant not available")
     def test_full_format_period_separation(self):
         """Test that periods are properly separated and don't run together."""
-        sample_forecast = """Tonight: Rain showers likely, mainly before 7am. Low around 52. Southeast wind 5 mph. Chance of precipitation is 80%.
-Tuesday: Rain showers likely, mainly before 7am. High near 64. Southeast wind 5 mph. Chance of precipitation is 60%.
-Tuesday Night: Partly cloudy, with a low around 47. West wind 5 mph."""
+        sample_forecast = (
+            "Tonight: Rain showers likely, mainly before 7am. Low around 52. "
+            "Southeast wind 5 mph. Chance of precipitation is 80%.\n"
+            "Tuesday: Rain showers likely, mainly before 7am. High near 64. "
+            "Southeast wind 5 mph. Chance of precipitation is 60%.\n"
+            "Tuesday Night: Partly cloudy, with a low around 47. West wind 5 mph."
+        )
 
         # Format the full forecast
         full_result = format_full_forecast(sample_forecast)
@@ -266,9 +297,13 @@ def test_full_format_period_separation(self):
     @pytest.mark.skipif(not HAS_HA, reason="Home Assistant not available")
     def test_full_format_vs_compact_format(self):
         """Test that full format provides more detail than compact format."""
-        sample_forecast = """Tonight: Rain showers likely, mainly before 7am. Low around 52. Southeast wind 5 mph. Chance of precipitation is 80%.
-Showers likely, mainly before 7am.
-Tuesday: Rain showers likely, mainly before 7am. High near 64. Southeast wind 5 mph. Chance of precipitation is 60%."""
+        sample_forecast = (
+            "Tonight: Rain showers likely, mainly before 7am. Low around 52. "
+            "Southeast wind 5 mph. Chance of precipitation is 80%.\n"
+            "Showers likely, mainly before 7am.\n"
+            "Tuesday: Rain showers likely, mainly before 7am. High near 64. "
+            "Southeast wind 5 mph. Chance of precipitation is 60%."
+        )
 
         # Format both formats
         from forecast_parser import format_compact_forecast
@@ -285,8 +320,11 @@ def test_full_format_vs_compact_format(self):
         assert (
             "Chance of precipitation is 80%" in full_result
         ), "Full format should contain detailed probability"
-        # Note: The detailed timing information might not be preserved in the current implementation
-        # assert "Showers likely, mainly before 7am" in full_result, "Full format should contain detailed timing"
+        # Note: The detailed timing information might not be preserved in the current
+        # implementation
+        # assert "Showers likely, mainly before 7am" in full_result, (
+        #     "Full format should contain detailed timing"
+        # )
 
         # Compact format should be more concise
         assert (
diff --git a/tests/test_imap_handler_extended.py b/tests/test_imap_handler_extended.py
index 0db9453..56964ac 100644
--- a/tests/test_imap_handler_extended.py
+++ b/tests/test_imap_handler_extended.py
@@ -127,8 +127,8 @@ def test_check_imap_sync_multipart(self, mock_imap_cls):
         msg.set_content("This is text part. 34.5, -118.2")
         msg.add_alternative("<b>HTML part</b>", subtype="html")
 
-        # Convert to bytes (need to use policy or generator for older python versions if needed,
-        # but EmailMessage.as_bytes() should work)
+        # Convert to bytes (need to use policy or generator for older python versions
+        # if needed, but EmailMessage.as_bytes() should work)
         msg_bytes = msg.as_bytes()
 
         mock_imap.fetch.return_value = ("OK", [(b"1 (RFC822 {100}", msg_bytes)])
diff --git a/tests/test_init.py b/tests/test_init.py
index 41bdb64..858b139 100644
--- a/tests/test_init.py
+++ b/tests/test_init.py
@@ -75,7 +75,15 @@ def return_future(*args, **kwargs):
         side_effect=return_future
     )
 
-    hass.config_entries.async_update_entry = MagicMock()
+    def update_entry_side_effect(entry, data=None, version=None, **kwargs):
+        if data:
+            entry.data.update(data)
+        if version is not None:
+            entry.version = version
+
+    hass.config_entries.async_update_entry = MagicMock(
+        side_effect=update_entry_side_effect
+    )
     hass.services = MagicMock()
     hass.services.async_register = MagicMock()
     hass.services.async_remove = MagicMock()
diff --git a/tests/test_naming_logic.py b/tests/test_naming_logic.py
index fecfccf..c247163 100644
--- a/tests/test_naming_logic.py
+++ b/tests/test_naming_logic.py
@@ -65,8 +65,11 @@ def test_parser_summary_today():
 
 
 def test_parser_summary_overnight():
-    """Test that 'Overnight' is summarized as 'Tdy' (or kept as ON if preferred, but let's check consistency)."""
-    # If forecast starts with Overnight, it's technically the start of the "day" from the user's perspective if they check late?
-    # Or maybe it should be "ON". The user request specifically mentioned "This Afternoon" -> "Tdy".
+    """Test that 'Overnight' is summarized as 'Tdy' (or kept as ON if preferred,
+    but let's check consistency)."""
+    # If forecast starts with Overnight, it's technically the start of the "day"
+    # from the user's perspective if they check late?
+    # Or maybe it should be "ON". The user request specifically mentioned
+    # "This Afternoon" -> "Tdy".
     # Let's stick to "This Afternoon" for now.
     pass
diff --git a/tests/test_percentage_context_bug.py b/tests/test_percentage_context_bug.py
index 7f68b3b..d6f465d 100644
--- a/tests/test_percentage_context_bug.py
+++ b/tests/test_percentage_context_bug.py
@@ -70,7 +70,9 @@ def test_percentage_with_percent_word():
 
 
 def test_no_percentage_near_event():
-    """Test that when no percentage is near the event keyword, it falls back to keyword-based inference."""
+    """Test that when no percentage is near the event keyword, it falls back to
+    keyword-based inference.
+    """
     period = ForecastPeriod(
         name="Today",
         start_time="2024-01-01T06:00:00-05:00",
diff --git a/tests/test_split_util_extended.py b/tests/test_split_util_extended.py
index e559654..259a445 100644
--- a/tests/test_split_util_extended.py
+++ b/tests/test_split_util_extended.py
@@ -88,8 +88,8 @@ def test_split_line_to_fill_space_not_beneficial(self):
         # Wait, it tries to fill as much as possible.
         # If we give it space for just "A", it's 1 char.
         # If available space is 10. "A very" is 6. 6/10 = 0.6.
-        # Let's try a case where the first word is very short compared to available space,
-        # but the next word makes it overflow.
+        # Let's try a case where the first word is very short compared to available
+        # space, but the next word makes it overflow.
         # "I am" -> "I" (1). "am" (2).
         # If available space is 10. "I am" fits.
         # We need a case where current_length < available_space * 0.4
@@ -147,7 +147,10 @@ def test_find_best_break_point_priorities(self):
     def test_split_summary_format_aggressive(self):
         """Test split_summary_format splitting long segments."""
         # A segment longer than limit
-        text = "Short | This is a very long segment that needs to be split aggressively because it exceeds the limit | End"
+        text = (
+            "Short | This is a very long segment that needs to be split aggressively "
+            "because it exceeds the limit | End"
+        )
         parts = split_summary_format(text, effective_limit=20)
         # Should split the middle part
         assert len(parts) > 3
diff --git a/tests/test_split_utility.py b/tests/test_split_utility.py
index a268343..1d8f315 100644
--- a/tests/test_split_utility.py
+++ b/tests/test_split_utility.py
@@ -31,7 +31,9 @@ class TestSplitUtility:
 
     @pytest.mark.skipif(not HAS_HA, reason="Home Assistant not available")
     def test_split_multiline_text_day_separation(self):
-        """Test that split_multiline_text properly separates days while combining efficiently."""
+        """Test that split_multiline_text properly separates days while combining
+        efficiently.
+        """
         # Create a compact format text with multiple days
         compact_text = """Tonight: Rain showers likely, mainly before 7am (L:52, SE5mph)
 Tuesday: Rain showers likely, mainly before 7am (H:64, SE5mph)
@@ -74,7 +76,9 @@ def test_split_multiline_text_day_separation(self):
 
     @pytest.mark.skipif(not HAS_HA, reason="Home Assistant not available")
     def test_split_multiline_text_efficient_combination(self):
-        """Test that split_multiline_text efficiently combines multiple days into single parts."""
+        """Test that split_multiline_text efficiently combines multiple days into
+        single parts.
+        """
         # Create a compact format text with short day entries
         compact_text = """Tonight: Rain (L:52)
 Tuesday: Rain (H:64)
@@ -110,7 +114,9 @@ def test_split_multiline_text_efficient_combination(self):
 
     @pytest.mark.skipif(not HAS_HA, reason="Home Assistant not available")
     def test_split_message_format_detection(self):
-        """Test that split_message correctly detects format type and uses appropriate splitting."""
+        """Test that split_message correctly detects format type and uses appropriate
+        splitting.
+        """
         # Test compact format (newlines)
         compact_text = """Tonight: Rain showers likely, mainly before 7am (L:52, SE5mph)
 Tuesday: Rain showers likely, mainly before 7am (H:64, SE5mph)"""
@@ -131,12 +137,20 @@ def test_split_message_format_detection(self):
     def test_split_message_character_limits(self):
         """Test that split_message respects character limits."""
         # Create a long text that should be split
-        long_text = """Tonight: Rain showers likely, mainly before 7am. Low around 52. Southeast wind 5 mph. Chance of precipitation is 80%. Showers likely, mainly before 7am.
-Tuesday: Rain showers likely, mainly before 7am. High near 64. Southeast wind 5 mph. Chance of precipitation is 60%. Showers likely, mainly before 7am.
-Tuesday Night: Partly cloudy, with a low around 47. West wind 5 mph.
-Wednesday: Partly sunny, with a high near 63. East wind 5 mph.
-Wednesday Night: A chance of rain between 10pm and 1am. Low around 52. Southeast wind 5 to 10 mph. Chance of precipitation is 30%.
-Thursday: A chance of rain between 7am and 1pm. High near 62. West wind 5 mph. Chance of precipitation is 30%."""
+        long_text = (
+            "Tonight: Rain showers likely, mainly before 7am. Low around 52. "
+            "Southeast wind 5 mph. Chance of precipitation is 80%. Showers likely, "
+            "mainly before 7am.\n"
+            "Tuesday: Rain showers likely, mainly before 7am. High near 64. "
+            "Southeast wind 5 mph. Chance of precipitation is 60%. Showers likely, "
+            "mainly before 7am.\n"
+            "Tuesday Night: Partly cloudy, with a low around 47. West wind 5 mph.\n"
+            "Wednesday: Partly sunny, with a high near 63. East wind 5 mph.\n"
+            "Wednesday Night: A chance of rain between 10pm and 1am. Low around 52. "
+            "Southeast wind 5 to 10 mph. Chance of precipitation is 30%.\n"
+            "Thursday: A chance of rain between 7am and 1pm. High near 62. "
+            "West wind 5 mph. Chance of precipitation is 30%."
+        )
 
         # Split with a small limit
         parts = split_message(long_text, device_type="zoleo")
@@ -154,12 +168,18 @@ def test_split_message_character_limits(self):
     def test_split_message_part_numbering(self):
         """Test that split_message adds part numbering when needed."""
         # Create a text that will be split into multiple parts
-        long_text = """Tonight: Rain showers likely, mainly before 7am. Low around 52. Southeast wind 5 mph. Chance of precipitation is 80%.
-Tuesday: Rain showers likely, mainly before 7am. High near 64. Southeast wind 5 mph. Chance of precipitation is 60%.
-Tuesday Night: Partly cloudy, with a low around 47. West wind 5 mph.
-Wednesday: Partly sunny, with a high near 63. East wind 5 mph.
-Wednesday Night: A chance of rain between 10pm and 1am. Low around 52. Southeast wind 5 to 10 mph. Chance of precipitation is 30%.
-Thursday: A chance of rain between 7am and 1pm. High near 62. West wind 5 mph. Chance of precipitation is 30%."""
+        long_text = (
+            "Tonight: Rain showers likely, mainly before 7am. Low around 52. "
+            "Southeast wind 5 mph. Chance of precipitation is 80%.\n"
+            "Tuesday: Rain showers likely, mainly before 7am. High near 64. "
+            "Southeast wind 5 mph. Chance of precipitation is 60%.\n"
+            "Tuesday Night: Partly cloudy, with a low around 47. West wind 5 mph.\n"
+            "Wednesday: Partly sunny, with a high near 63. East wind 5 mph.\n"
+            "Wednesday Night: A chance of rain between 10pm and 1am. Low around 52. "
+            "Southeast wind 5 to 10 mph. Chance of precipitation is 30%.\n"
+            "Thursday: A chance of rain between 7am and 1pm. High near 62. "
+            "West wind 5 mph. Chance of precipitation is 30%."
+        )
 
         # Split the message
         parts = split_message(long_text, device_type="zoleo")
diff --git a/tests/test_summary_format.py b/tests/test_summary_format.py
index 802f275..65e70a8 100644
--- a/tests/test_summary_format.py
+++ b/tests/test_summary_format.py
@@ -30,11 +30,17 @@ class TestSummaryFormat:
 
     @pytest.mark.skipif(not HAS_HA, reason="Home Assistant not available")
     def test_summary_format_space_after_colon(self):
-        """Test that summary format includes a space after the colon following day names."""
-        sample_forecast = """Tonight: Rain showers likely, mainly before 7am. Low around 52. Southeast wind 5 mph. Chance of precipitation is 80%.
-Tuesday: Rain showers likely, mainly before 7am. High near 64. Southeast wind 5 mph. Chance of precipitation is 60%.
-Tuesday Night: Partly cloudy, with a low around 47. West wind 5 mph.
-Wednesday: Partly sunny, with a high near 63. East wind 5 mph."""
+        """Test that summary format includes a space after the colon following day
+        names.
+        """
+        sample_forecast = (
+            "Tonight: Rain showers likely, mainly before 7am. Low around 52. "
+            "Southeast wind 5 mph. Chance of precipitation is 80%.\n"
+            "Tuesday: Rain showers likely, mainly before 7am. High near 64. "
+            "Southeast wind 5 mph. Chance of precipitation is 60%.\n"
+            "Tuesday Night: Partly cloudy, with a low around 47. West wind 5 mph.\n"
+            "Wednesday: Partly sunny, with a high near 63. East wind 5 mph."
+        )
 
         # Format the summary forecast
         summary_result = summarize_forecast(sample_forecast)
@@ -56,9 +62,13 @@ def test_summary_format_space_after_colon(self):
     @pytest.mark.skipif(not HAS_HA, reason="Home Assistant not available")
     def test_summary_format_day_separation(self):
         """Test that summary format properly separates days with newlines."""
-        sample_forecast = """Tonight: Rain showers likely, mainly before 7am. Low around 52. Southeast wind 5 mph. Chance of precipitation is 80%.
-Tuesday: Rain showers likely, mainly before 7am. High near 64. Southeast wind 5 mph. Chance of precipitation is 60%.
-Tuesday Night: Partly cloudy, with a low around 47. West wind 5 mph."""
+        sample_forecast = (
+            "Tonight: Rain showers likely, mainly before 7am. Low around 52. "
+            "Southeast wind 5 mph. Chance of precipitation is 80%.\n"
+            "Tuesday: Rain showers likely, mainly before 7am. High near 64. "
+            "Southeast wind 5 mph. Chance of precipitation is 60%.\n"
+            "Tuesday Night: Partly cloudy, with a low around 47. West wind 5 mph."
+        )
 
         # Format the summary forecast
         summary_result = summarize_forecast(sample_forecast)
@@ -98,8 +108,12 @@ def test_summary_format_day_separation(self):
     @pytest.mark.skipif(not HAS_HA, reason="Home Assistant not available")
     def test_summary_format_weather_events(self):
         """Test that summary format properly includes weather events."""
-        sample_forecast = """Tonight: Rain showers likely, mainly before 7am. Low around 52. Southeast wind 5 mph. Chance of precipitation is 80%.
-Tuesday: Rain showers likely, mainly before 7am. High near 64. Southeast wind 5 mph. Chance of precipitation is 60%."""
+        sample_forecast = (
+            "Tonight: Rain showers likely, mainly before 7am. Low around 52. "
+            "Southeast wind 5 mph. Chance of precipitation is 80%.\n"
+            "Tuesday: Rain showers likely, mainly before 7am. High near 64. "
+            "Southeast wind 5 mph. Chance of precipitation is 60%."
+        )
 
         # Format the summary forecast
         summary_result = summarize_forecast(sample_forecast)
@@ -117,8 +131,12 @@ def test_summary_format_weather_events(self):
     @pytest.mark.skipif(not HAS_HA, reason="Home Assistant not available")
     def test_summary_format_no_newlines(self):
         """Test that summary format uses newlines for separation."""
-        sample_forecast = """Tonight: Rain showers likely, mainly before 7am. Low around 52. Southeast wind 5 mph. Chance of precipitation is 80%.
-Tuesday: Rain showers likely, mainly before 7am. High near 64. Southeast wind 5 mph. Chance of precipitation is 60%."""
+        sample_forecast = (
+            "Tonight: Rain showers likely, mainly before 7am. Low around 52. "
+            "Southeast wind 5 mph. Chance of precipitation is 80%.\n"
+            "Tuesday: Rain showers likely, mainly before 7am. High near 64. "
+            "Southeast wind 5 mph. Chance of precipitation is 60%."
+        )
 
         # Format the summary forecast
         summary_result = summarize_forecast(sample_forecast)
@@ -133,9 +151,15 @@ def test_summary_format_no_newlines(self):
 
     @pytest.mark.skipif(not HAS_HA, reason="Home Assistant not available")
     def test_summary_format_splitting_detection(self):
-        """Test that summary format is correctly detected by the split_message function."""
-        sample_forecast = """Tonight: Rain showers likely, mainly before 7am. Low around 52. Southeast wind 5 mph. Chance of precipitation is 80%.
-Tuesday: Rain showers likely, mainly before 7am. High near 64. Southeast wind 5 mph. Chance of precipitation is 60%."""
+        """Test that summary format is correctly detected by the split_message
+        function.
+        """
+        sample_forecast = (
+            "Tonight: Rain showers likely, mainly before 7am. Low around 52. "
+            "Southeast wind 5 mph. Chance of precipitation is 80%.\n"
+            "Tuesday: Rain showers likely, mainly before 7am. High near 64. "
+            "Southeast wind 5 mph. Chance of precipitation is 60%."
+        )
 
         # Format the summary forecast
         summary_result = summarize_forecast(sample_forecast)
diff --git a/tests/test_text_length.py b/tests/test_text_length.py
index 28cff45..05b6f42 100644
--- a/tests/test_text_length.py
+++ b/tests/test_text_length.py
@@ -12,9 +12,15 @@
 from forecast_parser import format_forecast  # noqa: E402
 from split_util import split_message  # noqa: E402
 
-TEST_FORECAST = """This Afternoon: A chance of showers. Mostly cloudy, with a high near 50. Southeast wind around 10 mph. Chance of precipitation is 40%.
-Tonight: Showers likely, mainly between 7pm and 10pm, then rain after 10pm. Low around 41. Southeast wind around 15 mph. Chance of precipitation is 80%.
-Thursday: Rain likely. Cloudy, with a high near 49. Southeast wind 10 to 15 mph. Chance of precipitation is 70%."""
+TEST_FORECAST = (
+    "This Afternoon: A chance of showers. Mostly cloudy, with a high near 50. "
+    "Southeast wind around 10 mph. Chance of precipitation is 40%.\n"
+    "Tonight: Showers likely, mainly between 7pm and 10pm, then rain after 10pm. "
+    "Low around 41. Southeast wind around 15 mph. "
+    "Chance of precipitation is 80%.\n"
+    "Thursday: Rain likely. Cloudy, with a high near 49. "
+    "Southeast wind 10 to 15 mph. Chance of precipitation is 70%."
+)
 
 
 class TestTextLength:
diff --git a/tests/test_weather_utils_filtering.py b/tests/test_weather_utils_filtering.py
index c51ce46..4d2102a 100644
--- a/tests/test_weather_utils_filtering.py
+++ b/tests/test_weather_utils_filtering.py
@@ -76,7 +76,9 @@ def test_filter_periods_zero(mock_periods):
 
 
 def test_filter_periods_one(mock_periods):
-    """Test filtering with days=1 (should return Today + Tonight + Tuesday + Tuesday Night)."""
+    """Test filtering with days=1 (should return Today + Tonight + Tuesday +
+    Tuesday Night).
+    """
     # days=1 means "Today + Tomorrow"
     # target_days = 2
     result = filter_periods_by_days(mock_periods, 1)
diff --git a/tests/verify_installation.py b/tests/verify_installation.py
index 7fa1b17..4f3ed57 100644
--- a/tests/verify_installation.py
+++ b/tests/verify_installation.py
@@ -30,7 +30,8 @@ def check_installation_path():
     if not installed_path:
         print("❌ Integration not found in common locations")
         print(
-            "Please ensure you copied the entire 'custom_components/satcom_forecast' folder"
+            "Please ensure you copied the entire 'custom_components/satcom_forecast' "
+            "folder"
         )
         return False
 
@@ -163,7 +164,8 @@ def main():
         print("1. Restart Home Assistant completely")
         print("2. Check Home Assistant logs for any error messages")
         print(
-            "3. Try searching for 'SatCom Forecast' or 'satcom' in the integration search"
+            "3. Try searching for 'SatCom Forecast' or 'satcom' in the integration "
+            "search"
         )
     else:
         print("\nInstallation structure looks correct.")