From 3b8f4a0b86f8796f1e7925b9c6593a9d5198b437 Mon Sep 17 00:00:00 2001
From: Ned Batchelder <ned@nedbatchelder.com>
Date: Tue, 6 Oct 2015 07:14:18 -0400
Subject: Protect ourselves from mock'ed os. #416

---
 coverage/files.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'coverage/files.py')

diff --git a/coverage/files.py b/coverage/files.py
index 2b8727d4..0b5651cb 100644
--- a/coverage/files.py
+++ b/coverage/files.py
@@ -13,12 +13,14 @@ import sys
 
 from coverage import env
 from coverage.backward import unicode_class
-from coverage.misc import CoverageException, join_regex
+from coverage.misc import CoverageException, join_regex, isolate_module
 
 
 RELATIVE_DIR = None
 CANONICAL_FILENAME_CACHE = {}
 
+os = isolate_module(os)
+
 
 def set_relative_directory():
     """Set the directory that `relative_filename` will be relative to."""
-- 
cgit v1.2.1