diff --git a/update-on-ox b/update-on-ox
index d73054559..6ee71ffe1 100755
--- a/update-on-ox
+++ b/update-on-ox
@@ -50,9 +50,11 @@ with open(__file__, 'rb') as f:
 script = script[:script.find('# EOF_REMOTE')].replace('if False:', 'if True:', 1)
 with tempfile.NamedTemporaryFile(prefix='install-dmg-', suffix='.py') as f:
     cmd = 'python ../bypy macos program --dont-strip'
-    if 'sign' in sys.argv:
+    if 'dont_sign' not in sys.argv:
+        cmd += ' --sign-installers'
+    if 'notarize' in sys.argv:
         cmd += ' --sign-installers --notarize'
-    if 'skip_tests' in sys.argv:
+    if 'tests' not in sys.argv:
         cmd += ' --skip-tests'
     run(cmd)
     f.write(script.encode('utf-8'))