From 9c1faa95d18c287b5d33fb969185d0db483b486c Mon Sep 17 00:00:00 2001
From: Brandon Rhodes <brandon@rhodesmill.org>
Date: Wed, 22 Jul 2020 10:28:23 -0400
Subject: [PATCH] Try unittest.mock before third-party mock library

---
 skyfield/tests/test_io.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/skyfield/tests/test_io.py b/skyfield/tests/test_io.py
index 29dbe2a..c0df9cc 100644
--- a/skyfield/tests/test_io.py
+++ b/skyfield/tests/test_io.py
@@ -5,7 +5,10 @@ import shutil
 import tempfile
 from contextlib import contextmanager
 from datetime import date
-from mock import patch
+try:
+    from unittest.mock import patch
+except ImportError:
+    from mock import patch
 
 from skyfield import api