The invention relates to a system for analyzing a body fluid, comprising a collecting element (14) that accommodates the body fluid (32) in a reservoir (28), a test element (18) designed to detect an analyte in the body fluid (32), a transfer device (20) for establishing a fluid connection between the collecting element (14) and the test element (18), and a detection unit (22) that captures an analyte-specific measurement signal on the test element (18) during a measurement interval. According to the invention, the transfer device (20) always brings the test element (18) into contact with the body fluid (32) located in the reservoir (28) during the measurement interval, and the transfer device (20) is equipped to separate the test element (18) and the collecting element (14) again after the measurement interval.