diff --git a/atst/routes/errors.py b/atst/routes/errors.py
index d6edc566..7d03d29d 100644
--- a/atst/routes/errors.py
+++ b/atst/routes/errors.py
@@ -11,7 +11,6 @@ from atst.domain.invitations import (
 from atst.domain.authnid.crl import CRLInvalidException
 from atst.domain.portfolios import PortfolioError
 from atst.utils.flash import formatted_flash as flash
-from atst.utils.notification_sender import notification_sender
 
 
 def log_error(e):
@@ -21,7 +20,7 @@ def log_error(e):
 
 def handle_error(e, message="Not Found", code=404):
     log_error(e)
-    notification_sender.send(message)
+    current_app.notification_sender.send(message)
     return render_template("error.html", message=message), code
 
 
diff --git a/tests/conftest.py b/tests/conftest.py
index 6faaf715..dbff3193 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -14,7 +14,7 @@ import tests.factories as factories
 from tests.mocks import PDF_FILENAME, PDF_FILENAME2
 from tests.utils import FakeLogger
 
-from datetime import datetime, timezone, timedelta
+from datetime import datetime, timedelta
 from cryptography.hazmat.primitives.asymmetric import rsa
 from cryptography import x509
 from cryptography.hazmat.backends import default_backend