diff --git a/superset/reports/notifications/email.py b/superset/reports/notifications/email.py
index bdd8ef6e5793b..42ee9b4663425 100644
--- a/superset/reports/notifications/email.py
+++ b/superset/reports/notifications/email.py
@@ -23,7 +23,6 @@
 from typing import Any, Dict, Optional
 
 import bleach
-
 from flask_babel import gettext as __
 
 from superset import app
diff --git a/tests/unit_tests/notifications/email_tests.py b/tests/unit_tests/notifications/email_tests.py
index 2b98905933281..9bc8b8090f3da 100644
--- a/tests/unit_tests/notifications/email_tests.py
+++ b/tests/unit_tests/notifications/email_tests.py
@@ -15,9 +15,10 @@
 # specific language governing permissions and limitations
 # under the License.
 import pandas as pd
+from flask.ctx import AppContext
 
 
-def test_render_description_with_html(app_context):
+def test_render_description_with_html(app_context: AppContext) -> None:
     # `superset.models.helpers`, a dependency of following imports,
     # requires app context
     from superset.reports.models import ReportRecipients, ReportRecipientType