diff --git a/arkindex/ponos/api.py b/arkindex/ponos/api.py
index a6ba542a10065ab8a9b4856d46193a0898f445d1..60ae9d1725e7d16ef5f9fb8c0b73020af527e763 100644
--- a/arkindex/ponos/api.py
+++ b/arkindex/ponos/api.py
@@ -223,11 +223,9 @@ class TaskRestart(ProcessACLMixin, CreateAPIView):
             raise ValidationError(
                 detail="Task's state must be in a final state to be restarted."
             )
-        # TODO Check the original_task_id field directly once it is implemented
-        # https://gitlab.teklia.com/arkindex/frontend/-/issues/1383
         if len(Task.objects.filter(original_task=task)) > 0:
             raise ValidationError(
-                detail="This task has already been restarted"
+                detail="This task has already been restarted."
             )
         return task
 
diff --git a/arkindex/ponos/tests/test_api.py b/arkindex/ponos/tests/test_api.py
index fbf730f6ab8263f37dd01ddbb41699eac2b9be82..0e21aa2a6293aa0c5f29e3e62c374c40ba86e385 100644
--- a/arkindex/ponos/tests/test_api.py
+++ b/arkindex/ponos/tests/test_api.py
@@ -589,14 +589,16 @@ class TestAPI(FixtureAPITestCase):
         self.task1.slug = self.task1.slug + "_old1"
         self.task1.state = State.Completed.value
         self.task1.save()
-        with self.assertNumQueries(7):
+        self.task2.original_task_id = self.task1.id
+        self.task2.save()
+        with self.assertNumQueries(8):
             response = self.client.post(
                 reverse("api:task-restart", kwargs={"pk": str(self.task1.id)})
             )
             self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
             self.assertListEqual(
                 response.json(),
-                ["This task has already been restarted"],
+                ["This task has already been restarted."],
             )
 
     @patch("arkindex.project.aws.s3")
@@ -641,7 +643,7 @@ class TestAPI(FixtureAPITestCase):
         self.task2.save()
 
         self.client.force_login(self.user)
-        with self.assertNumQueries(13):
+        with self.assertNumQueries(14):
             with patch("django.utils.timezone.now") as mock_now:
                 mock_now.return_value = datetime.now(timezone.utc) + timedelta(minutes=2)
                 response = self.client.post(
@@ -708,7 +710,7 @@ class TestAPI(FixtureAPITestCase):
         self.task2.save()
 
         self.client.force_login(self.user)
-        with self.assertNumQueries(13):
+        with self.assertNumQueries(14):
             response = self.client.post(
                 reverse("api:task-restart", kwargs={"pk": str(self.task2.id)})
             )