It is not just sufficient if you are following the above KPAs to become CMM level 3 compliant company.
Hope u know that there are 5 levels and inorder to be level 3 compliant u have to be level 2 and level 3 KPA compliant, level 1 has no KPAs though.
There are a total of 13 KPAs(in level 2 and 3 together) which a company has to be compliant of if it has to go for assessment and get certification.
It is not that level 3 compliant companies particularly apply to software testing. testing is just a part or stage of software developement and the KPAs in these levels are applicable to the entire SDLC.