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-rw-r--r--coverage/multiproc.py1
1 files changed, 1 insertions, 0 deletions
diff --git a/coverage/multiproc.py b/coverage/multiproc.py
index fe83731..986ee9d 100644
--- a/coverage/multiproc.py
+++ b/coverage/multiproc.py
@@ -33,6 +33,7 @@ class ProcessWithCoverage(OriginalProcess):
from coverage import Coverage # avoid circular import
rcfile = os.environ[COVERAGE_RCFILE_ENV]
cov = Coverage(data_suffix=True, config_file=rcfile)
+ cov._warn_preimported_source = False
cov.start()
debug = cov.debug
try: