diff --git a/python/mach/mach/base.py b/python/mach/mach/base.py
--- a/python/mach/mach/base.py
+++ b/python/mach/mach/base.py
@@ -5,10 +5,15 @@
 from __future__ import absolute_import, unicode_literals
 
 from mach.telemetry import NoopTelemetry
 
 
+def test(hello):
+    a = sum(1, 2, 3)
+    return a
+
+
 class CommandContext(object):
     """Holds run-time state so it can easily be passed to command providers."""
 
     def __init__(
         self,