A test element for detecting an analyte in a liquid sample which is substantially disk-shaped and rotatable about an axis perpendicular to the plane of the disk-shaped test element, containing - a sample application opening for applying a liquid sample, - a capillary-active zone which is a porous, absorbent matrix , wherein the capillary-active zone contains one or more zones with immobilized reagents, wherein the immobilized reagents are specific binding reagents which are suitable to selectively capture the analyte or species derived from and related to the analyte from the sample flowing through the capillary-active zone and which are present in the form of lines, dots, patterns immobilized in or on the material of the capillary-active zone , having a first end remote from the axis and a second end near to the axis, and - a sample channel extending from the sample application opening via an area near to the axis to the first end of the capillary-active zone that is remote from the axis; characterized in that the first end of the capillary-active zone that is remote from the axis is in contact with the sample channel ; and the sample application opening is near to the axis and the sample channel extends from the sample application opening near to the axis to the first end of the capillary-active zone that is remote from the axis; and the sample channel has an inlet for further liquids except for the sample liquid; and wherein said inlet has a separate addition opening for further liquids, preferably washing buffer, and an associated channel capable of transporting the buffer to the capillary-active zone , wherein the separate addition opening is arranged closer to the axis about which the test element is rotatable than the area of the sample channel which is directly connected to the first end of the capillary-active zone that is remote from the axis; and the associated channel directly connects the separate addition opening to the area of the sample channel which is directly connected to the first end of the capillary-active zone that is remote from the axis. - a sample application opening for applying a liquid sample, - a capillary-active zone which is a porous, absorbent matrix , wherein the capillary-active zone contains one or more zones with immobilized reagents, wherein the immobilized reagents are specific binding reagents which are suitable to selectively capture the analyte or species derived from and related to the analyte from the sample flowing through the capillary-active zone and which are present in the form of lines, dots, patterns immobilized in or on the material of the capillary-active zone , having a first end remote from the axis and a second end near to the axis, and - a sample channel extending from the sample application opening via an area near to the axis to the first end of the capillary-active zone that is remote from the axis; the first end of the capillary-active zone that is remote from the axis is in contact with the sample channel ; and the sample application opening is near to the axis and the sample channel extends from the sample application opening near to the axis to the first end of the capillary-active zone that is remote from the axis; and the sample channel has an inlet for further liquids except for the sample liquid; and wherein said inlet has a separate addition opening for further liquids, preferably washing buffer, and an associated channel capable of transporting the buffer to the capillary-active zone , wherein the separate addition opening is arranged closer to the axis about which the test element is rotatable than the area of the sample channel which is directly connected to the first end of the capillary-active zone that is remote from the axis; and the associated channel directly connects the separate addition opening to the area of the sample channel which is directly connected to the first end of the capillary-active zone that is remote from the axis. <EOS>