A genuine-material test piece for the training of explosives sniffer dogs includes an explosive assimilated by a solid or liquid carrier material, a housing having an interior space, and a closure for a reversible gastight closure of the interior space or a space including the interior space. The carrier material with the explosive is contained in the interior space. A gas-permeable device prevents the carrier material from escaping from the interior space if the interior space or the space including the interior space is not gas-tightly closed by the closure.
