diff --git a/dags/stellar_etl_airflow/test_sources.py b/dags/stellar_etl_airflow/test_sources.py
index d1a072e4..7807ed3b 100644
--- a/dags/stellar_etl_airflow/test_sources.py
+++ b/dags/stellar_etl_airflow/test_sources.py
@@ -20,8 +20,8 @@ def compare_transforms_and_bq_rows():
         session.query(DagRun)
         .filter(
             DagRun.dag_id == "history_archive_without_captive_core",
-            DagRun.execution_date >= yesterday.start_of('day'),
-            DagRun.execution_date < yesterday.add(days=1).start_of('day'),
+            DagRun.execution_date >= yesterday.start_of("day"),
+            DagRun.execution_date < yesterday.add(days=1).start_of("day"),
             DagRun.state == State.SUCCESS,
         )
         .all()