diff --git a/tests/queries/test_current_interest.py b/tests/queries/test_current_interest.py
index 3332890..de3af8d 100644
--- a/tests/queries/test_current_interest.py
+++ b/tests/queries/test_current_interest.py
@@ -6,9 +6,11 @@ from dibbler.models.Transaction import DEFAULT_INTEREST_RATE_PERCENTAGE
 from dibbler.models import Transaction, User
 from dibbler.queries.current_interest import current_interest
 
+
 def test_current_interest_no_history(sql_session: Session) -> None:
     assert current_interest(sql_session) == DEFAULT_INTEREST_RATE_PERCENTAGE
 
+
 def test_current_interest_with_history(sql_session: Session) -> None:
     user = User("Admin User")
     sql_session.add(user)
diff --git a/tests/queries/test_search_product.py b/tests/queries/test_search_product.py
index ed1b35e..16e4b5a 100644
--- a/tests/queries/test_search_product.py
+++ b/tests/queries/test_search_product.py
@@ -5,23 +5,30 @@ from sqlalchemy.orm import Session
 from dibbler.models import Product
 from dibbler.queries.search_product import search_product
 
+
 def test_search_product_no_products(sql_session: Session) -> None:
     pass
 
+
 def test_search_product_name_exact_match(sql_session: Session) -> None:
     pass
 
+
 def test_search_product_name_partial_match(sql_session: Session) -> None:
     pass
 
+
 def test_search_product_name_no_match(sql_session: Session) -> None:
     pass
 
+
 def test_search_product_barcode_exact_match(sql_session: Session) -> None:
     pass
 
+
 def test_search_product_hidden_products(sql_session: Session) -> None:
     pass
 
+
 def test_search_product_find_hidden_products(sql_session: Session) -> None:
     pass
diff --git a/tests/queries/test_user_balance.py b/tests/queries/test_user_balance.py
index 5661b37..99cab2c 100644
--- a/tests/queries/test_user_balance.py
+++ b/tests/queries/test_user_balance.py
@@ -299,8 +299,4 @@ def test_user_balance_penalty_interest_combined(sql_session: Session) -> None:
 
     pprint(user_balance_log(sql_session, user))
 
-    assert user_balance(sql_session, user) == (
-        27
-        - 200
-        - math.ceil(27 * 2 * 1.1)
-    )
+    assert user_balance(sql_session, user) == (27 - 200 - math.ceil(27 * 2 * 1.1))