A ringtest was performed to introduce collembolans for the OECD test guideline programme. One species, the parthenogenetic Folsomia candida, is already an approved ISO standard while the sexually reproducing Folsomia fimetaria is introduced in the draft test guideline as an alternative to F. candida. Although F. fimetaria requires some initial running-in it delivers robust testing results and is recommended for the testing of compounds that may interfere with the reproductive system.