diff --git a/src/reactive/designate_handlers.py b/src/reactive/designate_handlers.py
index efb5ef2..15e5006 100644
--- a/src/reactive/designate_handlers.py
+++ b/src/reactive/designate_handlers.py
@@ -242,7 +242,10 @@ def cluster_connected(hacluster):
 @reactive.when('dnsaas.connected')
 def expose_endpoint(endpoint):
     with charm.provide_charm_instance() as instance:
-        endpoint.expose_endpoint(instance.public_url)
+        if hookenv.config('use-internal-endpoints'):
+            endpoint.expose_endpoint(instance.internal_url)
+        else:
+            endpoint.expose_endpoint(instance.public_url)
 
 
 @reactive.when_not('dont-set-assess-status')
diff --git a/unit_tests/test_designate_handlers.py b/unit_tests/test_designate_handlers.py
index 282a2d9..ba66f04 100644
--- a/unit_tests/test_designate_handlers.py
+++ b/unit_tests/test_designate_handlers.py
@@ -147,8 +147,14 @@ class TestHandlers(test_utils.PatchHelper):
         self.is_data_changed().__exit__.return_value = None
         keystone = mock.MagicMock()
         handlers.maybe_setup_endpoint(keystone)
-        self.is_data_changed.called_once_with(mock.ANY, args)
         keystone.register_endpoints.assert_called_once_with(*args)
+        endpoint = mock.MagicMock()
+        handlers.expose_endpoint(endpoint)
+        endpoint.expose_endpoint.assert_called_once_with('i1')
+        endpoint = mock.MagicMock()
+        self.patch_object(handlers.hookenv, 'config', return_value=False)
+        handlers.expose_endpoint(endpoint)
+        endpoint.expose_endpoint.assert_called_once_with('p1')
 
     def test_configure_designate_basic(self):
         the_charm = self._patch_provide_charm_instance()