--- /dev/null
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+use Test::More;
+use Test::Warn;
+use DBIx::Class::Carp;
+use lib 't/lib';
+use DBICTest;
+
+warnings_exist {
+ DBIx::Class::frobnicate();
+} [
+ qr/carp1/,
+ qr/carp2/,
+], 'expected warnings from carp_once';
+
+done_testing;
+
+sub DBIx::Class::frobnicate {
+ DBIx::Class::branch1();
+ DBIx::Class::branch2();
+}
+
+sub DBIx::Class::branch1 { carp_once 'carp1' }
+sub DBIx::Class::branch2 { carp_once 'carp2' }