diff --git a/atst/routes/portfolios/task_orders.py b/atst/routes/portfolios/task_orders.py
index c38e2ccd..64748875 100644
--- a/atst/routes/portfolios/task_orders.py
+++ b/atst/routes/portfolios/task_orders.py
@@ -5,6 +5,7 @@ from flask import g, redirect, render_template, url_for, request as http_request
 from . import portfolios_bp
 from atst.database import db
 from atst.domain.task_orders import TaskOrders
+from atst.domain.exceptions import NotFoundError
 from atst.domain.portfolios import Portfolios
 from atst.domain.authz import Authorization
 from atst.forms.officers import EditTaskOrderOfficersForm
@@ -122,13 +123,7 @@ def task_order_invitations(portfolio_id, task_order_id):
             form=form,
         )
     else:
-        return redirect(
-            url_for(
-                "portfolios.view_task_order",
-                task_order_id=task_order.id,
-                portfolio_id=portfolio.id,
-            )
-        )
+        raise NotFoundError("task_order")
 
 
 @portfolios_bp.route(
diff --git a/tests/routes/portfolios/test_task_orders.py b/tests/routes/portfolios/test_task_orders.py
index d5a3b3ae..fe994bc8 100644
--- a/tests/routes/portfolios/test_task_orders.py
+++ b/tests/routes/portfolios/test_task_orders.py
@@ -227,14 +227,7 @@ def test_cant_view_task_order_invitations_when_not_complete(client, user_session
             task_order_id=task_order.id,
         )
     )
-    assert (
-        url_for(
-            "portfolios.view_task_order",
-            task_order_id=task_order.id,
-            portfolio_id=portfolio.id,
-        )
-        in response.location
-    )
+    assert response.status_code == 404
 
 
 def test_ko_can_view_ko_review_page(client, user_session):