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-rw-r--r--coverage/cmdline.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/coverage/cmdline.py b/coverage/cmdline.py
index b45547ba..d04da399 100644
--- a/coverage/cmdline.py
+++ b/coverage/cmdline.py
@@ -603,6 +603,10 @@ class CoverageScript(object):
"""Implementation of 'coverage run'."""
if not args:
+ if options.module:
+ # Specified -m with nothing else.
+ self.help_fn("No module specified for -m")
+ return ERR
command_line = self.coverage.get_option("run:command_line")
if command_line is not None:
args = shlex.split(command_line)