--- a/testing/marionette/harness/marionette_harness/runner/base.py
+++ b/testing/marionette/harness/marionette_harness/runner/base.py
@@ -351,17 +351,17 @@ class BaseMarionetteArguments(ArgumentPa
         self.add_argument('--pydebugger',
                           help='Enable python post-mortem debugger when a test fails.'
                                ' Pass in the debugger you want to use, eg pdb or ipdb.')
         self.add_argument('--disable-e10s',
                           action='store_false',
                           dest='e10s',
                           default=True,
                           help='Disable e10s when running marionette tests.')
-        self.add_argument("--headless",
+        self.add_argument("-z", "--headless",
                           action="store_true",
                           dest="headless",
                           default=os.environ.get("MOZ_HEADLESS", False),
                           help="Run tests in headless mode.")
         self.add_argument('--tag',
                           action='append', dest='test_tags',
                           default=None,
                           help="Filter out tests that don't have the given tag. Can be "