A test kit for performing a diagnostic procedure. The kit comprises a plastic base which has an upper surface. The base is formed from a plastic material and a plurality of upwardly opening nests are provided in the upper surface of the base. A test component is provided in each of the nests in a manner such that the components may be displayed and made available for use. The test components are preferably displayed in essentially the plane of the upper surface of the base and an instruction booklet is provided so as to overlie the test components at the beginning of the procedure. The arrangement of the components and the size and shape of the pages of the booklet are such that as the user follows the instructions and turns pages in the booklet, components remain hidden from view until needed in conducting the procedure. The pages of the booklet are progressively shorter from front to back in the booklet so that as the pages are turned components of the kit come into view as needed.