Body fluid testing device for analyzing a body fluid, comprising:a test media tape (30) adapted to collect the body fluid,said test media tape (30) comprising a tape and test media portions, wherein a free tape portion without test medium is located between successive test media portions,said testing device further comprising a supply portion (50a)wherein said supply portion (50a) comprises a housing in which uncontaminated test media tape (30) is contained, said housing (100) further having an opening for withdrawing test media tape (30) from the housing (100),said supply portion (50a) further having a sealing means for closing said opening against the surrounding, wherein a free tape portion of said test media tape (30)is located between a surface (typically a wall of the housing (100)) and the sealing means when said sealing means closes said opening, andwherein the sealing means can assume a first position in which the sealing means closes the opening of the container and a second position in which the opening is opened so that test media tape can be withdrawn out of the housing.The application further concerns a test media cassette with sealing means and a method for providing test media while holding them sealed against humidity during on board storage.
