diff --git a/tests/app/main/views/test_service_settings.py b/tests/app/main/views/test_service_settings.py
index 9e1e62e8c..a4a72a04c 100644
--- a/tests/app/main/views/test_service_settings.py
+++ b/tests/app/main/views/test_service_settings.py
@@ -847,6 +847,39 @@ def test_switch_service_disable_letters(
     assert mocked_fn.call_args == call(service_one['id'], {"can_send_letters": False})
 
 
+def test_switch_service_enable_international_sms(
+    logged_in_platform_admin_client,
+    service_one,
+    mocker,
+):
+    mocked_fn = mocker.patch('app.service_api_client.update_service_with_properties', return_value=service_one)
+
+    response = logged_in_platform_admin_client.get(
+        url_for('main.service_switch_can_send_international_sms', service_id=service_one['id'])
+    )
+
+    assert response.status_code == 302
+    assert response.location == url_for('main.service_settings', service_id=service_one['id'], _external=True)
+    assert mocked_fn.call_args == call(service_one['id'], {'can_send_international_sms': True})
+
+
+def test_switch_service_disable_international_sms(
+    logged_in_platform_admin_client,
+    service_one,
+    mocker,
+):
+    service_one['can_send_international_sms'] = True
+    mocked_fn = mocker.patch('app.service_api_client.update_service_with_properties', return_value=service_one)
+
+    response = logged_in_platform_admin_client.get(
+        url_for('main.service_switch_can_send_international_sms', service_id=service_one['id'])
+    )
+
+    assert response.status_code == 302
+    assert response.location == url_for('main.service_settings', service_id=service_one['id'], _external=True)
+    assert mocked_fn.call_args == call(service_one['id'], {"can_send_international_sms": False})
+
+
 def test_archive_service_after_confirm(
     logged_in_platform_admin_client,
     service_one,