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-rw-r--r--coverage/data.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/coverage/data.py b/coverage/data.py
index fb0b0224..324d7335 100644
--- a/coverage/data.py
+++ b/coverage/data.py
@@ -16,7 +16,9 @@ from coverage import env
from coverage.backward import iitems, string_class
from coverage.debug import _TEST_NAME_FILE
from coverage.files import PathAliases
-from coverage.misc import CoverageException, file_be_gone
+from coverage.misc import CoverageException, file_be_gone, isolate_module
+
+os = isolate_module(os)
class CoverageData(object):