diff --git a/app/main/views/send.py b/app/main/views/send.py
index 638f67cc0..d650c90dd 100644
--- a/app/main/views/send.py
+++ b/app/main/views/send.py
@@ -157,14 +157,18 @@ def get_example_csv(service_id, template_id):
     }
 
 
-@main.route("/services/<service_id>/send/<template_id>/test")
+@main.route("/services/<service_id>/send/<template_id>/test", endpoint='send_test')
+@main.route("/services/<service_id>/send/<template_id>/one-off", endpoint='send_one_off')
 @login_required
 @user_has_permissions('send_texts', 'send_emails', 'send_letters')
 def send_test(service_id, template_id):
     session['send_test_values'] = dict()
     session['send_test_letter_page_count'] = None
     return redirect(url_for(
-        '.send_test_step',
+        {
+            'main.send_test': '.send_test_step',
+            'main.send_one_off': '.send_one_off_step',
+        }[request.endpoint],
         service_id=service_id,
         template_id=template_id,
         step_index=0,
@@ -172,14 +176,28 @@ def send_test(service_id, template_id):
     ))
 
 
-@main.route("/services/<service_id>/send/<template_id>/test/step-<int:step_index>", methods=['GET', 'POST'])
+@main.route(
+    "/services/<service_id>/send/<template_id>/test/step-<int:step_index>",
+    methods=['GET', 'POST'],
+    endpoint='send_test_step',
+)
+@main.route(
+    "/services/<service_id>/send/<template_id>/one-off/step-<int:step_index>",
+    methods=['GET', 'POST'],
+    endpoint='send_one_off_step',
+)
 @login_required
 @user_has_permissions('send_texts', 'send_emails', 'send_letters')
 def send_test_step(service_id, template_id, step_index):
 
     if 'send_test_values' not in session:
         return redirect(url_for(
-            '.send_test', service_id=service_id, template_id=template_id
+            {
+                'main.send_test_step': '.send_test',
+                'main.send_one_off_step': '.send_one_off',
+            }[request.endpoint],
+            service_id=service_id,
+            template_id=template_id,
         ))
 
     template = service_api_client.get_service_template(service_id, template_id)['data']
@@ -210,7 +228,12 @@ def send_test_step(service_id, template_id, step_index):
         current_placeholder = placeholders[step_index]
     except IndexError:
         return redirect(url_for(
-            '.send_test', service_id=service_id, template_id=template_id
+            {
+                'main.send_test_step': '.send_test',
+                'main.send_one_off_step': '.send_one_off',
+            }[request.endpoint],
+            service_id=service_id,
+            template_id=template_id,
         ))
     optional_placeholder = (current_placeholder in optional_address_columns)
     form = get_placeholder_form_instance(
@@ -230,7 +253,7 @@ def send_test_step(service_id, template_id, step_index):
             return make_and_upload_csv_file(service_id, template)
 
         return redirect(url_for(
-            '.send_test_step',
+            request.endpoint,
             service_id=service_id,
             template_id=template_id,
             step_index=step_index + 1,
@@ -247,7 +270,7 @@ def send_test_step(service_id, template_id, step_index):
         )
     else:
         back_link = url_for(
-            '.send_test_step',
+            request.endpoint,
             service_id=service_id,
             template_id=template_id,
             step_index=step_index - 1,
diff --git a/tests/app/main/views/test_send.py b/tests/app/main/views/test_send.py
index e22550798..e5152763a 100644
--- a/tests/app/main/views/test_send.py
+++ b/tests/app/main/views/test_send.py
@@ -297,18 +297,23 @@ def test_send_test_sms_message(
     mock_s3_upload.assert_called_with(service_one['id'], expected_data, 'eu-west-1')
 
 
+@pytest.mark.parametrize('endpoint', [
+    'main.send_test_step',
+    'main.send_one_off_step',
+])
 def test_send_test_step_redirects_if_session_not_setup(
     logged_in_client,
     service_one,
     fake_uuid,
     mock_get_service_email_template,
+    endpoint,
 ):
 
     with logged_in_client.session_transaction() as session:
         assert 'send_test_values' not in session
 
     response = logged_in_client.get(
-        url_for('main.send_test_step', service_id=service_one['id'], template_id=fake_uuid, step_index=0),
+        url_for(endpoint, service_id=service_one['id'], template_id=fake_uuid, step_index=0),
         follow_redirects=True
     )
     assert response.status_code == 200
@@ -317,6 +322,10 @@ def test_send_test_step_redirects_if_session_not_setup(
         assert session['send_test_values'] == {'email address': 'test@user.gov.uk'}
 
 
+@pytest.mark.parametrize('endpoint', [
+    'main.send_test_step',
+    'main.send_one_off_step',
+])
 def test_send_test_redirects_to_end_if_step_out_of_bounds(
     logged_in_client,
     service_one,
@@ -325,13 +334,14 @@ def test_send_test_redirects_to_end_if_step_out_of_bounds(
     mock_s3_upload,
     mock_get_users_by_service,
     mock_get_detailed_service_for_today,
+    endpoint,
 ):
 
     with logged_in_client.session_transaction() as session:
         session['send_test_values'] = {'name': 'foo'}
 
     response = logged_in_client.get(url_for(
-        'main.send_test_step',
+        endpoint,
         service_id=service_one['id'],
         template_id=fake_uuid,
         step_index=999,
@@ -351,6 +361,10 @@ def test_send_test_redirects_to_end_if_step_out_of_bounds(
     )
 
 
+@pytest.mark.parametrize('endpoint, expected_redirect', [
+    ('main.send_test_step', 'main.send_test'),
+    ('main.send_one_off_step', 'main.send_one_off'),
+])
 def test_send_test_redirects_to_start_if_you_skip_steps(
     logged_in_platform_admin_client,
     service_one,
@@ -360,6 +374,8 @@ def test_send_test_redirects_to_start_if_you_skip_steps(
     mock_get_users_by_service,
     mock_get_detailed_service_for_today,
     mocker,
+    endpoint,
+    expected_redirect,
 ):
 
     with logged_in_platform_admin_client.session_transaction() as session:
@@ -367,20 +383,24 @@ def test_send_test_redirects_to_start_if_you_skip_steps(
         session['send_test_values'] = {'address_line_1': 'foo'}
 
     response = logged_in_platform_admin_client.get(url_for(
-        'main.send_test_step',
+        endpoint,
         service_id=service_one['id'],
         template_id=fake_uuid,
         step_index=7,  # letter template has 7 placeholders – we’re at the end
     ))
     assert response.status_code == 302
     assert response.location == url_for(
-        'main.send_test',
+        expected_redirect,
         service_id=service_one['id'],
         template_id=fake_uuid,
         _external=True,
     )
 
 
+@pytest.mark.parametrize('endpoint, expected_redirect', [
+    ('main.send_test_step', 'main.send_test'),
+    ('main.send_one_off_step', 'main.send_one_off'),
+])
 def test_send_test_redirects_to_start_if_index_out_of_bounds_and_some_placeholders_empty(
     logged_in_client,
     service_one,
@@ -389,13 +409,15 @@ def test_send_test_redirects_to_start_if_index_out_of_bounds_and_some_placeholde
     mock_s3_download,
     mock_get_users_by_service,
     mock_get_detailed_service_for_today,
+    endpoint,
+    expected_redirect,
 ):
 
     with logged_in_client.session_transaction() as session:
         session['send_test_values'] = {'name': 'foo'}
 
     response = logged_in_client.get(url_for(
-        'main.send_test_step',
+        endpoint,
         service_id=service_one['id'],
         template_id=fake_uuid,
         step_index=999,
@@ -403,24 +425,30 @@ def test_send_test_redirects_to_start_if_index_out_of_bounds_and_some_placeholde
 
     assert response.status_code == 302
     assert response.location == url_for(
-        'main.send_test',
+        expected_redirect,
         service_id=service_one['id'],
         template_id=fake_uuid,
         _external=True,
     )
 
 
+@pytest.mark.parametrize('endpoint, expected_redirect', [
+    ('main.send_test', 'main.send_test_step'),
+    ('main.send_one_off', 'main.send_one_off_step'),
+])
 def test_send_test_sms_message_redirects_with_help_argument(
     logged_in_client,
     service_one,
     fake_uuid,
+    endpoint,
+    expected_redirect,
 ):
     response = logged_in_client.get(
-        url_for('main.send_test', service_id=service_one['id'], template_id=fake_uuid, help=1)
+        url_for(endpoint, service_id=service_one['id'], template_id=fake_uuid, help=1)
     )
     assert response.status_code == 302
     assert response.location == url_for(
-        'main.send_test_step',
+        expected_redirect,
         service_id=service_one['id'],
         template_id=fake_uuid,
         step_index=0,