From bba1ecfe2712f04fef0f676f16ad410bf617c024 Mon Sep 17 00:00:00 2001
From: Richard Hansen <rhansen@rhansen.org>
Date: Wed, 8 Jul 2020 15:49:31 -0400
Subject: [PATCH] Switch from `redefine` to `mock`

---
 t/write_cache.pl | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/t/write_cache.pl b/t/write_cache.pl
index b92fd15..94e959b 100644
--- a/t/write_cache.pl
+++ b/t/write_cache.pl
@@ -8,7 +8,9 @@ eval { require 'ddclient'; } or BAIL_OUT($@);
 my $warning;
 
 my $module = Test::MockModule->new('ddclient');
-$module->redefine('warning', sub {
+# Note: 'mock' is used instead of 'redefine' because 'redefine' is not available in the versions of
+# Test::MockModule distributed with old Debian and Ubuntu releases.
+$module->mock('warning', sub {
     BAIL_OUT("warning already logged") if defined($warning);
     $warning = sprintf(shift, @_);
 });