A test element (110) for detecting at least one analyte in a body fluid is disclosed. The test element (110) comprises a housing (112) having at least one base element (114) and at least one cover element (116). The test element (110) further comprises at least one fluid channel (124) formed within the housing (112). The fluid channel (124) comprises a capillary region (126) and a measurement region (130), wherein the capillary region (126) and the measurement region (130) have differing aspect ratios. The cover element (116) comprises at least one test field (138) having at least one test chemical (140). The test chemical (140) is adapted to change at least one optically measurable property in the presence of the analyte. The cover element (116) is mounted to the base element (114) by using at least one adhesive (134) which contacts the test field (138).