Only set @ARGV if it's empty

diff --git a/author/munge-tests-for-moose.pl b/author/munge-tests-for-moose.pl
index a851ba7..96ec4da 100755 (executable)
--- a/author/munge-tests-for-moose.pl
+++ b/author/munge-tests-for-moose.pl
@@ -3,7 +3,7 @@ use strict;
 use warnings;
 
 BEGIN {
-    @ARGV = glob('t/*.t t/*/*.t');
+    @ARGV = glob('t/*.t t/*/*.t') if !@ARGV;
     $^I = '';
 }