diff --git a/python/mach_commands.py b/python/mach_commands.py
--- a/python/mach_commands.py
+++ b/python/mach_commands.py
@@ -40,10 +40,12 @@
     exec_file,
     ipython,
     virtualenv,
     args,
 ):
+    print("python")
+
     # Avoid logging the command
     command_context.log_manager.terminal_handler.setLevel(logging.CRITICAL)
 
     # Note: subprocess requires native strings in os.environ on Windows.
     append_env = {"PYTHONDONTWRITEBYTECODE": str("1")}