[cmd] Fix test: chart to model arg

command_line/test/test_mac.py

@@ -122,7 +122,7 @@ def test_minigraph1(raw_feed_output):
     # See the docstring for the normal command line in shell context
     params = {
         'all_macs': False,
-        'chart_file': fd_model_name, # Filename + path
+        'model_file': fd_model_name, # Filename + path
         'combinations': False,
         'continue': False,
         'final_prop': 'Px',