diff --git a/src/allmydata/testing/web.py b/src/allmydata/testing/web.py
index f6411792d..2b0f830f2 100644
--- a/src/allmydata/testing/web.py
+++ b/src/allmydata/testing/web.py
@@ -1,3 +1,16 @@
+# -*- coding: utf-8 -*-
+# Tahoe-LAFS -- secure, distributed storage grid
+#
+# Copyright © 2020 The Tahoe-LAFS Software Foundation
+#
+# This file is part of Tahoe-LAFS.
+#
+# See the docs/about.rst file for licensing information.
+
+"""
+Test-helpers for clients that use the WebUI.
+"""
+
 import hashlib
 
 import attr
@@ -28,6 +41,11 @@ from allmydata.util import (
     base32,
 )
 
+__all__ = (
+    "create_fake_tahoe_root",
+    "create_tahoe_treq_client",
+)
+
 
 class _FakeTahoeRoot(Resource, object):
     """