A test fixture for testing a material according to a particular test procedure. A metallic base and four non-conductive side panels are affixed along a periphery of the base to form an internal cavity, and a non-conductive top cover is hingedly connected to one side panel. A metallic bottom electrode has an upper surface for holding a test material and a lower portion installed into a first aperture in an upper surface of the base. A metallic top electrode has a lower portion with a lower surface for contacting the test material and an upper portion extending out of a cover aperture in the top cover when the lower surface is in contact with the test material. A voltage source is coupled to perform the testing via a terminal on the base and the upper portion of the top electrode.