Methods and test sets allow multi-line telecommunications services to be tested. The methods and test sets utilize multiple connections so that test connections to multiple lines can be made at once. Multiple test clips may be used where two clips are attached to two conductors of the test set for each line to be tested. A modular plug such as an RJ-11 plug may be used to plug into a modular jack that provides multiple lines of telecommunication service, and the modular plug has a pair of conductors connected to a pair of conductors of a test set for each line to be tested. Additionally, various combinations of clips and modular plugs may be provided to establish test connections to the multiple telecommunication lines to be tested.