Hello @arrmo,
It isn’t you! The telegraf --test command doesn’t run the processors, it’s something the team has been meaning to change but never get the time. I usually debug this by adding a file output writing to stdout and then run Telegraf for a bit with only the plugins of interest, this way I avoid writing unwanted data to my database:
telegraf --input-filter=snmp --output-filter=file
^taken from Snmp input regex conversion help
