diff --git a/tests/test_diceware.py b/tests/test_diceware.py
index 4c147a01d8c8f11aefeed5fba117c2c41532abfa..c0b783c548fd1d52ba37c4f3408d4a910b3fddae 100644
--- a/tests/test_diceware.py
+++ b/tests/test_diceware.py
@@ -151,7 +151,7 @@ class TestDicewareModule(object):
     def test_main_help(self, capsys):
         # we can get help
         with pytest.raises(SystemExit) as exc_info:
-            main(['diceware', '--help'])
+            main(['--help'])
         assert exc_info.value.code == 0
         out, err = capsys.readouterr()
         out = out.replace(