We claim the ornamental design for a test kit, as shown and described.
FIG. 1 is an upper perspective view of a first embodiment of the test kit;
FIG. 2 is a lower perspective view of the test kit in FIG. 1;
FIG. 3 is a top plan view of the test kit shown in FIG. 1;
FIG. 4 is a bottom plan view of the test kit shown in FIG. 1;
FIG. 5 is a right side view of the test kit shown in FIG. 1;
FIG. 6 is a left side view of the test kit shown in FIG. 1;
FIG. 7 is a forward view of the test kit shown in FIG. 1; and,
FIG. 8 is a rear view of the test kit shown in FIG. 1.
The broken lines depict portions of the test kit that form no part of the claimed design; the broken lines and the unshaded surfaces form no part of the claimed design.