diff --git a/t/Koha.t b/t/Koha.t
index 1742ddd6cf..be5a83800d 100755
--- a/t/Koha.t
+++ b/t/Koha.t
@@ -2,7 +2,7 @@
 use strict;
 use warnings;
 
-use Test::More tests => 7;
+use Test::More tests => 8;
 
 use_ok('C4::Koha');
 
@@ -22,3 +22,4 @@ is($str, q{'"&<>'}, '... and does not change input in place');
 
 is(C4::Koha::_isbn_cleanup('0-590-35340-3'), '0590353403', '_isbn_cleanup removes hyphens');
 is(C4::Koha::_isbn_cleanup('0590353403 (pbk.)'), '0590353403', '_isbn_cleanup removes parenthetical');
+is(C4::Koha::_isbn_cleanup('978-0-321-49694-2'), '0321496949', '_isbn_cleanup converts ISBN-13 to ISBN-10');