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-rw-r--r--coverage/collector.py8
1 files changed, 6 insertions, 2 deletions
diff --git a/coverage/collector.py b/coverage/collector.py
index 42a97f1a..0a43d87c 100644
--- a/coverage/collector.py
+++ b/coverage/collector.py
@@ -3,14 +3,18 @@
"""Raw data collector for coverage.py."""
-import os, sys
+import os
+import sys
from coverage import env
from coverage.backward import iitems
from coverage.files import abs_file
-from coverage.misc import CoverageException
+from coverage.misc import CoverageException, isolate_module
from coverage.pytracer import PyTracer
+os = isolate_module(os)
+
+
try:
# Use the C extension code when we can, for speed.
from coverage.tracer import CTracer, CFileDisposition # pylint: disable=no-name-in-module