# PFSELFTEST The `PFSELFTEST` command is an internal command. It is meant to be used for developing and testing Redis. ## Return information {{< multitabs id="pfselftest-return-info" tab1="RESP2" tab2="RESP3" >}} [Simple string reply](../../develop/reference/protocol-spec#simple-strings): `OK`. -tab-sep- [Simple string reply](../../develop/reference/protocol-spec#simple-strings): `OK`.