--- /dev/null
+use strict;
+use warnings;
+
+use Test::More;
+use SQL::Abstract::Tree;
+
+ok my $placeholders = [100,'xxx'];
+ok my $sqlat = SQL::Abstract::Tree->new({profile=>'html'});
+ok my $out = $sqlat->format('SELECT * FROM bar WHERE x = ?', $placeholders);
+
+is $placeholders->[0], 100,
+ 'did not mess up a placeholder';
+
+done_testing;