A method for training staff for quality control when filling amorphous products into primary packaging. The method includes a provision step during which a test set having a plurality of primary packages filled with an amorphous product is provided, wherein at least one of the filled primary packages is afflicted by a contaminant comprising a fluorescent marker. A training step includes presenting the test set to a person to be trained, who carries out a visual quality control for detecting contaminants. The result of the training step is documented. A verification step is conducted during which the test set is irradiated by excitation light, wherein fluorescing contaminants are detected and the result of the verification step is documented. A comparison step is done during which the result of the training step and the result of the verification step are compared. Also disclosed is an inventive test kit and test set.