Analytic test unit and test system

An analytic test unit for use in a test instrument for detecting an analyte in a bodily fluid, comprising:

• a test element having a light-transmissive carrier film;
• a reagent layer applied to the carrier film and to which bodily fluid can be applied, wherein the reagent layer includes a chemical reagent that changes color when it is wetted by the bodily fluid;
• and
• a spreading layer positioned adjacent the reagent layer and configured to spread the bodily fluid laterally along the reagent layer;
• wherein the carrier film can be positioned in a beam path of a photometric measuring unit for optically scanning the reagent layer, the photometric measuring unit having a plurality of optical waveguides positioned substantially parallel to one another, at least one of the waveguides configured to be positioned substantially perpendicular to the carrier film and to transmit light to the carrier film and at least another one of the waveguides configured to transmit light away from the carrier film, further wherein the carrier film comprises a raised surface structure configured to reduce reflections in the beam path of the measuring unit.