The ornamental design for a laboratorytestingcartridge, as shown and described.
FIG. 1 is a top perspective view of a laboratory testing cartridge showing our design.
FIG. 2 is a front side elevational view thereof.
FIG. 3 is a rear side elevational view thereof.
FIG. 4 is a right side elevational view thereof.
FIG. 5 is a left side elevational view thereof.
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The bottom of the laboratory testing cartridge is flat.
The evenly spaced broken lines in FIG. 7 depict portions of the laboratory testing cartridge that form no part of the claimed design. The dot-dash-dot broken line in FIG. 7 defines the boundaries of the claimed design and forms no part thereof.