1. You should never make cluster related edits under /system/local
2. Your indexes.conf file shouldn't be in '/opt/splunk/etc/apps/search/local' but instead in /etc/master-apps folder on the cluster master.
All configs to slave indexers MUST be pushed from /etc/master-apps and the recieving slaves will save those configs (indexes.conf, props.conf etc) under /etc/slave-apps.
Please check your configs and you will see that your test index will be there once you get your directory strucutre sorted.
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