is $kdbx->minimum_version, KDBX_VERSION_3_1, 'Icon with no metadata requires no upgrade';
my $icon_uuid = $kdbx->add_custom_icon('data2', name => 'icon name');
is $kdbx->minimum_version, KDBX_VERSION_4_1, 'Icon with name requires upgrade';
is $kdbx->minimum_version, KDBX_VERSION_3_1, 'Icon with no metadata requires no upgrade';
my $icon_uuid = $kdbx->add_custom_icon('data2', name => 'icon name');
is $kdbx->minimum_version, KDBX_VERSION_4_1, 'Icon with name requires upgrade';