diff --git a/openappstack/__main__.py b/openappstack/__main__.py
index 3f570786b86f3ca44772f26982bc117ba4379e10..c314fdaab1aa54e91113a216a977aa0b4334f57a 100755
--- a/openappstack/__main__.py
+++ b/openappstack/__main__.py
@@ -213,7 +213,6 @@ def main():  # pylint: disable=too-many-statements,too-many-branches,too-many-lo
         help=('Run taiko in observe mode'))
     test_parser.add_argument(
         '--apps',
-        action='store_true',
         default='all',
         help=('Which apps to test (i.e. "nextcloud,wordpress". Defaults to'
               '"all".'))