The name test is reserved by the Internet Engineering Task Force (IETF) in RFC 2606 (June 1999) as a domain name that is not intended to be installed as a top-level domain (TLD) in the global Domain Name System (DNS) of the Internet for production use.^[1]

Reserved DNS names

In 1999, the Internet Engineering Task Force reserved the DNS labels example, invalid, localhost, and test so that they may not be installed into the root zone of the Domain Name System.

The reasons for reservation of these top-level domain names is to reduce the likelihood of conflict and confusion.^[1] This allows the use of these names for either documentation purposes or in local testing scenarios.

References

ca:.test cs:.test da:.test eu:.test fr:.test it:.test hu:.test ja:. no:.test oc:.test pl:.test ru:.test sv:Toppdom n