CNF Test Suite is now part of the Cloud Native Telcom Initiatives Test Catalog @ https://github.com/cnti-testcatalog/testsuite
The CNF Test Suite (as well as the CNF WG and CNF Certification) have moved to Linux Foundation Networking as part of the new Cloud Native Telecom Initiative.
The repos have been transferred as follows:
You can find out more about the initiative on it's wiki page