diff --git a/src/tests/test_national.py b/src/tests/test_national.py
index f4c99dfa..9ba50ad3 100644
--- a/src/tests/test_national.py
+++ b/src/tests/test_national.py
@@ -131,6 +131,7 @@ def test_get_national_forecast(db_session, api_client):
         != national_forecast.forecast_values[0].expected_power_generation_megawatts * 0.9
     )
 
+
 def test_get_national_forecast_null_plevels(db_session, api_client):
     """Check main solar/GB/national/forecast route works"""
 
@@ -154,12 +155,11 @@ def test_get_national_forecast_null_plevels(db_session, api_client):
     national_forecast = NationalForecast(**response.json())
     assert national_forecast.forecast_values[0].plevels is not None
     assert (
-            national_forecast.forecast_values[0].plevels["plevel_10"]
-            == national_forecast.forecast_values[0].expected_power_generation_megawatts * 0.8
+        national_forecast.forecast_values[0].plevels["plevel_10"]
+        == national_forecast.forecast_values[0].expected_power_generation_megawatts * 0.8
     )
 
 
-
 def test_read_latest_national_values_start_and_end_filters_include_metadata(db_session, api_client):
     """Check main solar/GB/national/forecast route works"""
 
diff --git a/src/utils.py b/src/utils.py
index 52584126..cec13069 100644
--- a/src/utils.py
+++ b/src/utils.py
@@ -166,7 +166,6 @@ def format_plevels(national_forecast_value: NationalForecastValue):
     # rename '10' and '90' to plevel_10 and plevel_90
     for c in ["10", "90"]:
         if c in national_forecast_value.plevels.keys():
-
             # get value
             value = national_forecast_value.plevels.pop(c)