diff --git a/src/database.py b/src/database.py
index 00be6e4b..fd25561a 100644
--- a/src/database.py
+++ b/src/database.py
@@ -171,7 +171,6 @@ def get_latest_forecast_values_for_a_specific_gsp_from_database(
     start_datetime = get_start_datetime()
 
     if forecast_horizon_minutes is None:
-
         forecast_values = get_forecast_values_latest(
             session=session, gsp_id=gsp_id, start_datetime=start_datetime, model_name="blend"
         )
@@ -187,9 +186,11 @@ def get_latest_forecast_values_for_a_specific_gsp_from_database(
         )
 
     # convert to pydantic objects
-    if isinstance(forecast_values[0], ForecastValueSevenDaysSQL) or \
-            isinstance(forecast_values[0], ForecastValueSQL) or \
-            isinstance(forecast_values[0], ForecastValueLatestSQL):
+    if (
+        isinstance(forecast_values[0], ForecastValueSevenDaysSQL)
+        or isinstance(forecast_values[0], ForecastValueSQL)
+        or isinstance(forecast_values[0], ForecastValueLatestSQL)
+    ):
         forecast_values = [ForecastValue.from_orm(f) for f in forecast_values]
 
     return forecast_values
@@ -243,7 +244,10 @@ def get_truth_values_for_a_specific_gsp_from_database(
 
 
 def get_truth_values_for_all_gsps_from_database(
-    session: Session, start_gsp: Optional[int] = 1, end_gsp: Optional[int] = N_GSP+1, regime: Optional[str] = "in-day"
+    session: Session,
+    start_gsp: Optional[int] = 1,
+    end_gsp: Optional[int] = N_GSP + 1,
+    regime: Optional[str] = "in-day",
 ) -> List[LocationWithGSPYields]:
     """Get the truth value for all gsps for yesterday and today
 
diff --git a/src/tests/test_gsp.py b/src/tests/test_gsp.py
index deb7b23c..f597966c 100644
--- a/src/tests/test_gsp.py
+++ b/src/tests/test_gsp.py
@@ -22,7 +22,9 @@
 def test_read_latest_one_gsp(db_session, api_client):
     """Check main solar/GB/gsp/{gsp_id}/forecast route works"""
 
-    forecasts = make_fake_forecasts(gsp_ids=list(range(0, 2)), session=db_session, add_latest=True, model_name='blend')
+    forecasts = make_fake_forecasts(
+        gsp_ids=list(range(0, 2)), session=db_session, add_latest=True, model_name="blend"
+    )
     db_session.add_all(forecasts)
     db_session.commit()
 
@@ -72,7 +74,9 @@ def test_read_latest_gsp_id_greater_than_total(db_session, api_client):
 def test_read_latest_gsp_id_equal_to_total(db_session, api_client):
     """Check that request with gsp_id<318 returns 200"""
 
-    forecasts = make_fake_forecasts(gsp_ids=[317], session=db_session, add_latest=True, model_name='blend')
+    forecasts = make_fake_forecasts(
+        gsp_ids=[317], session=db_session, add_latest=True, model_name="blend"
+    )
     db_session.add_all(forecasts)
 
     app.dependency_overrides[get_session] = lambda: db_session
diff --git a/src/tests/test_merged_routes.py b/src/tests/test_merged_routes.py
index 3781c17b..583b55a2 100644
--- a/src/tests/test_merged_routes.py
+++ b/src/tests/test_merged_routes.py
@@ -17,19 +17,28 @@ def test_read_forecast_values_gsp(db_session, api_client):
     model = get_model(session=db_session, name="blend", version="0.0.1")
 
     forecast_value_1_sql = ForecastValueLatestSQL(
-        target_time=datetime(2023, 6, 2), expected_power_generation_megawatts=1, gsp_id=1, model_id=model.id
+        target_time=datetime(2023, 6, 2),
+        expected_power_generation_megawatts=1,
+        gsp_id=1,
+        model_id=model.id,
     )
 
     forecast_value_2_sql = ForecastValueLatestSQL(
-        target_time=datetime(2023, 6, 1, 1), expected_power_generation_megawatts=2, gsp_id=1, model_id=model.id
+        target_time=datetime(2023, 6, 1, 1),
+        expected_power_generation_megawatts=2,
+        gsp_id=1,
+        model_id=model.id,
     )
 
     forecast_value_3_sql = ForecastValueLatestSQL(
-        target_time=datetime(2023, 6, 1), expected_power_generation_megawatts=3, gsp_id=1, model_id=model.id
+        target_time=datetime(2023, 6, 1),
+        expected_power_generation_megawatts=3,
+        gsp_id=1,
+        model_id=model.id,
     )
 
     forecast = make_fake_forecast(
-        gsp_id=1, session=db_session, t0_datetime_utc=datetime(2023, 1, 1), model_name='blend'
+        gsp_id=1, session=db_session, t0_datetime_utc=datetime(2023, 1, 1), model_name="blend"
     )
     forecast.forecast_values_latest.append(forecast_value_1_sql)
     forecast.forecast_values_latest.append(forecast_value_2_sql)