Abstract: A rapid test device for detecting a target analyte in a saliva sample is disclosed. The rapid test device includes an elongate housing forming an interior channel extending in a flow direction. A lateral flow test strip for detecting the target analyte being is accommodated in the elongate housing and extending along the channel in flow direction, wherein the lateral flow test strip includes a sample pad. A saliva receiving port at an end portion of the elongate housing is configured to receive the saliva sample directly from a mouth of a user. A sample collection cavity extending from the saliva receiving port in the flow direction for collecting the saliva sample received through the saliva receiving port. The sample pad of the lateral flow test strip extends into the sample collection cavity to receive saliva collected in the sample collection cavity.