The ornamental design for a three-dimensional (3D) printer test target, as shown and described.
FIG. 1 is a front and top perspective view of a three-dimensional (3D) printer test target;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The broken lines that are shown in the drawings are included for the purpose of illustrating portions of the three-dimensional (3D) printer test target and form no part of the claimed design. The solid lines and the surfaces between the solid lines, which are shown in the drawings, are part of the claimed design.