diff --git a/certbot/certbot/_internal/plugins/selection.py b/certbot/certbot/_internal/plugins/selection.py
index 0b04791c6..b4ece7b15 100644
--- a/certbot/certbot/_internal/plugins/selection.py
+++ b/certbot/certbot/_internal/plugins/selection.py
@@ -3,11 +3,13 @@ from __future__ import print_function
 
 import logging
 
+from typing import Optional, Tuple
 import six
 import zope.component
 
 from certbot import errors
 from certbot import interfaces
+from certbot._internal.plugins import disco
 from certbot.compat import os
 from certbot.display import util as display_util
 
@@ -175,7 +177,9 @@ def record_chosen_plugins(config, plugins, auth, inst):
          config.authenticator, config.installer)
 
 
-def choose_configurator_plugins(config, plugins, verb):
+def choose_configurator_plugins(config: interfaces.IConfig, plugins: disco.PluginsRegistry,
+                                verb: str) -> Tuple[Optional[interfaces.IInstaller],
+                                                    Optional[interfaces.IAuthenticator]]:
     """
     Figure out which configurator we're going to use, modifies
     config.authenticator and config.installer strings to reflect that choice if
@@ -183,7 +187,7 @@ def choose_configurator_plugins(config, plugins, verb):
 
     :raises errors.PluginSelectionError if there was a problem
 
-    :returns: (an `IAuthenticator` or None, an `IInstaller` or None)
+    :returns: tuple of (`IInstaller` or None, `IAuthenticator` or None)
     :rtype: tuple
     """