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-rw-r--r--coverage/cmdline.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/coverage/cmdline.py b/coverage/cmdline.py
index dfdbd1c7..5f972035 100644
--- a/coverage/cmdline.py
+++ b/coverage/cmdline.py
@@ -6,6 +6,7 @@
import glob
import optparse # pylint: disable=deprecated-module
+import os
import os.path
import shlex
import sys
@@ -739,6 +740,8 @@ class CoverageScript:
)
return ERR
+ os.environ["COVERAGE_RUN"] = "true"
+
runner = PyRunner(args, as_module=bool(options.module))
runner.prepare()