diff --git a/xCAT-test/unit/ubuntu_copycd_grub2_loader_media.t b/xCAT-test/unit/ubuntu_copycd_grub2_loader_media.t
new file mode 100644
index 000000000..7ec01706c
--- /dev/null
+++ b/xCAT-test/unit/ubuntu_copycd_grub2_loader_media.t
@@ -0,0 +1,63 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+use File::Temp qw(tempdir);
+use FindBin;
+use Test::More;
+
+# The stubbed test proves the decisions copycd makes. This one proves the artifact: it runs the
+# real grub-mkimage over the grub2 package of real Ubuntu media and checks that what comes out is
+# what the management node will serve to a riscv64 node.
+#
+# It needs copied riscv64 media and the grub2 build tools, so it runs where those exist:
+#   XCAT_TEST_UBUNTU_RISCV64_MEDIA=/install/ubuntu24.04.4/riscv64 perl <this test>
+# Without them it skips, which is why the stubbed test still covers the decisions.
+
+BEGIN {
+    package xCAT::TableUtils;
+    our $tftpdir;
+    sub getTftpDir { return $tftpdir; }
+    $INC{'xCAT/TableUtils.pm'} = __FILE__;
+}
+
+my $media = $ENV{XCAT_TEST_UBUNTU_RISCV64_MEDIA};
+plan skip_all => 'set XCAT_TEST_UBUNTU_RISCV64_MEDIA to copied riscv64 media' unless $media;
+plan skip_all => "no media at $media" unless -d $media;
+foreach my $tool (qw(dpkg-deb grub-mkimage)) {
+    my $found = grep { -x "$_/$tool" } split( /:/, $ENV{PATH} // '' );
+    plan skip_all => "$tool is not installed" unless $found;
+}
+
+use lib "$FindBin::Bin/../../perl-xCAT";
+use lib "$FindBin::Bin/../../xCAT-server/lib/perl";
+my $plugin = "$FindBin::Bin/../../xCAT-server/lib/xcat/plugins/debian.pm";
+plan skip_all => 'debian.pm not found' unless -r $plugin;
+eval { require $plugin; 1 } or plan skip_all => "could not load debian.pm: $@";
+
+$xCAT::TableUtils::tftpdir = tempdir( CLEANUP => 1 );
+my @told;
+my $target = xCAT_plugin::debian::install_media_grub2_loader(
+    $media, 'riscv64',
+    sub { push @told, ( $_[0]->{data} // () ), @{ $_[0]->{warning} || [] } } );
+
+ok( defined $target, 'the media produced a loader' )
+  or diag( join( "\n", @told ) ), done_testing(), exit;
+is( $target, "$xCAT::TableUtils::tftpdir/boot/grub2/grub2.riscv64",
+    'it is where nodeset serves it from' );
+ok( -s $target, '... and it is not empty' );
+
+# The same checks nodeset depends on, against a real grub-mkimage image rather than a fabricated one.
+my $build = { machine => 0x5064, format => 'riscv64-efi', package => 'grub-efi-riscv64-bin' };
+ok( xCAT_plugin::debian::_is_uefi_image( $target, $build->{machine} ),
+    'the image is a riscv64 UEFI application' );
+ok( xCAT_plugin::debian::_is_netboot_loader( $target, $build ),
+    '... carrying the prefix and the modules a net boot needs' );
+
+# A second import must not rebuild it: the image already in place is the one the nodes booted.
+my $before = ( stat($target) )[9];
+my $again  = xCAT_plugin::debian::install_media_grub2_loader( $media, 'riscv64', undef );
+is( $again, $target, 'a second import returns the loader already in place' );
+is( ( stat($target) )[9], $before, '... without rewriting it' );
+
+done_testing();