The ornamental design for an electricalreceptacletester, as shown and described.
FIG. 1 is a front perspective view of an electrical receptacle tester according to our new and ornamental design;
FIG. 2 is a right side view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is front view thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is top view thereof; and,
FIG. 7 is a bottom view thereof.
The evenly broken lines in the embodiment of the electrical receptacle tester depict portions of the electrical receptacle tester that form no part of the claimed design.