An electrical series terminal with a terminal housing, with two conductor connecting elements located in it, and with two current busses, first end regions of which are each assigned to a conductor connecting element and second end regions of which together form an elastic contact region for accommodating the contact plug of a test plug. In the electrical series terminal, when the test plug is inserted into the test opening, elastic contact legs of the second end regions are bent back relative to one another and which together form a second elastic contact region for holding the contact plug of a test plug. The second contact region in the insertion direction is located in front of the first contact region so that an inserted contact plug first makes contact with the second contact region and only upon further insertion with the first contact region.