--- a/screenplain/main.py
+++ b/screenplain/main.py
@@ -30,7 +30,7 @@ def invalid_format(parser, message):
     )
 
 
-def main(args):
+def main(args=sys.argv[1:]):
     parser = OptionParser(usage=usage)
     parser.add_option(
         '-f', '--format', dest='output_format',
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,2 +1,5 @@
 [metadata]
 license_files = LICENSE.txt
+
+[pycodestyle]
+ignore = E275,E402,W504