Tester-side connection unit for a test handler, in particular a semiconductor test handler, for connection to a handler-side connection unit, comprising: - a first tester-side frame, which comprises a plurality of tester-side engagement elements, which is adapted to engage with a plurality of handler-side engagement elements, wherein the plurality of tester-side engagement elements is movably formed on the first tester-side frame, and wherein, in order to connect the tester-side connection unit to the handler-side connection unit, the plurality of tester-side engagement elements can be guided in such a way that the plurality of tester-side engagement elements engages with the plurality of handler-side engagement elements; characterized in that the tester-side connection unit further comprises: - a second tester-side frame designed to be slidable substantially in parallel relative to the first tester-side frame, wherein the second tester-side frame comprises a plurality of recesses, through which the plurality of tester-side engagement elements protrude, wherein the plurality of tester-side engagement elements can be guided by the second tester-side frame, and wherein, in order to connect the tester-side connection unit to the handler-side connection unit, the second tester-side frame is movable to a securing position and the plurality of tester-side engagement elements can be guided by means of the second tester-side frame in such a way in the same direction that the plurality of tester-side engagement elements engages with the plurality of handler-side engagement elements. - a first tester-side frame, which comprises a plurality of tester-side engagement elements, which is adapted to engage with a plurality of handler-side engagement elements, wherein the plurality of tester-side engagement elements is movably formed on the first tester-side frame, and wherein, in order to connect the tester-side connection unit to the handler-side connection unit, the plurality of tester-side engagement elements can be guided in such a way that the plurality of tester-side engagement elements engages with the plurality of handler-side engagement elements; characterized in that the tester-side connection unit further comprises: wherein the plurality of tester-side engagement elements is movably formed on the first tester-side frame, and wherein, in order to connect the tester-side connection unit to the handler-side connection unit, the plurality of tester-side engagement elements can be guided in such a way that the plurality of tester-side engagement elements engages with the plurality of handler-side engagement elements; characterized in that the tester-side connection unit further comprises: - a second tester-side frame designed to be slidable substantially in parallel relative to the first tester-side frame, wherein the second tester-side frame comprises a plurality of recesses, through which the plurality of tester-side engagement elements protrude, wherein the plurality of tester-side engagement elements can be guided by the second tester-side frame, and wherein, in order to connect the tester-side connection unit to the handler-side connection unit, the second tester-side frame is movable to a securing position and the plurality of tester-side engagement elements can be guided by means of the second tester-side frame in such a way in the same direction that the plurality of tester-side engagement elements engages with the plurality of handler-side engagement elements. wherein the second tester-side frame comprises a plurality of recesses, through which the plurality of tester-side engagement elements protrude, wherein the plurality of tester-side engagement elements can be guided by the second tester-side frame, and wherein, in order to connect the tester-side connection unit to the handler-side connection unit, the second tester-side frame is movable to a securing position and the plurality of tester-side engagement elements can be guided by means of the second tester-side frame in such a way in the same direction that the plurality of tester-side engagement elements engages with the plurality of handler-side engagement elements.