is $kdbx->minimum_version, KDBX_VERSION_4_1, 'Icon with name requires upgrade';
$kdbx->remove_custom_icon($icon_uuid);
is $kdbx->minimum_version, KDBX_VERSION_3_1, 'Reset upgrade requirement';
- $icon_uuid = $kdbx->add_custom_icon('data2', last_modification_time => gmtime);
+ $icon_uuid = $kdbx->add_custom_icon('data2', last_modification_time => scalar gmtime);
is $kdbx->minimum_version, KDBX_VERSION_4_1, 'Icon with modtime requires upgrade';
$kdbx->remove_custom_icon($icon_uuid);
is $kdbx->minimum_version, KDBX_VERSION_3_1, 'Reset upgrade requirement';