A system for changing a state of a reading device, the system comprising: a reading device arranged to operate in a first state for reading a result of a test performed using a test stick, the reading device comprising a detection means arranged to detect a first reading influenced by a detection region of the test stick； an inserter for changing a state of the reading device； wherein, when the inserter is inserted into the reading device, the detection means detects a second reading distinct from the first reading, the reading device being arranged to operate in a second state in response to detecting the second reading.
