%0 Conference Proceedings %F Jard-Jeron-Morel-Testcom2000 %A Jard, C. %A Jéron, T. %A Morel, P. %T Verification of Test Suites %B TestCom 2000, IFIP TC 6 / WG 6.1, The IFIP 13th International Conference on Testing of Communicating Systems, Ottawa, Ontario, Canada %E Ural, H. %E Probert, R.L. %E v. Bochman, G. %I Kluwer Academic Publishers %X We present a formal approach to check the correctness and to propose corrections of hand-written test suites with respect to a formal specification of the protocol implementations to test. It is shown that this requires in general a complex algorithmic comparable to model-checking. The principles of a prototype tool, called VTS, and based on the synthesis algorithms of TGV, are presented. We then prove the usefulness of the technique by checking a significant part of the ATM Forum test suite for the SSCOP protocol %U http://www.irisa.fr/vertecs/Publis/Ps/2000-TESTCOM.ps.gz %8 August %D 2000