diff --git a/app/helpers/url_safe_serializer.py b/app/helpers/url_safe_serializer.py
index a8c0634337..1fe20b51db 100644
--- a/app/helpers/url_safe_serializer.py
+++ b/app/helpers/url_safe_serializer.py
@@ -6,4 +6,7 @@
 
 
 def url_safe_serializer() -> URLSafeSerializer:
-    return URLSafeSerializer(current_app.secret_key, salt=cookie_session[EQ_SESSION_ID])
+    secret_key = current_app.secret_key
+    if secret_key is None:
+        raise ValueError("Flask application secret key is not set.")
+    return URLSafeSerializer(secret_key, salt=cookie_session[EQ_SESSION_ID])
diff --git a/tests/app/data_model/conftest.py b/tests/app/data_model/conftest.py
index d5d94b5313..4e182b8abb 100644
--- a/tests/app/data_model/conftest.py
+++ b/tests/app/data_model/conftest.py
@@ -1,4 +1,3 @@
-# pylint: disable=redefined-outer-name
 from datetime import datetime, timedelta, timezone
 
 import pytest
diff --git a/tests/app/helpers/test_template_helpers.py b/tests/app/helpers/test_template_helpers.py
index 9006c71333..bdf8b3bf6d 100644
--- a/tests/app/helpers/test_template_helpers.py
+++ b/tests/app/helpers/test_template_helpers.py
@@ -1,4 +1,3 @@
-# pylint: disable=too-many-lines
 from typing import Type
 
 import pytest