The ornamental design for an electricalreceptacletester, as shown and described.
FIG. 1 is a top, first side perspective view of our new design for an electrical receptacle tester in accordance with the present invention;
FIG. 2 is a top, second side perspective view thereof;
FIG. 3 is a side elevational view of the first side thereof;
FIG. 4 is a bottom perspective view thereof; and,
FIG. 5 is a top view thereof.
The broken lines within the various embodiments of the claimed design and the spaces therein are for environmental purposes only and form no part of the claimed design.