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-rw-r--r--coverage/control.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/coverage/control.py b/coverage/control.py
index 1fb0f5bf..16b5f35e 100644
--- a/coverage/control.py
+++ b/coverage/control.py
@@ -23,7 +23,7 @@ from coverage.files import PathAliases, find_python_files, prep_patterns
from coverage.files import ModuleMatcher, abs_file
from coverage.html import HtmlReporter
from coverage.misc import CoverageException, bool_or_none, join_regex
-from coverage.misc import file_be_gone
+from coverage.misc import file_be_gone, isolate_module
from coverage.monkey import patch_multiprocessing
from coverage.plugin import FileReporter
from coverage.plugin_support import Plugins
@@ -32,6 +32,7 @@ from coverage.results import Analysis, Numbers
from coverage.summary import SummaryReporter
from coverage.xmlreport import XmlReporter
+os = isolate_module(os)
# Pypy has some unusual stuff in the "stdlib". Consider those locations
# when deciding where the stdlib is.