ISO/IEC 15504 defines base practices for software processes and presents a set of generic practices that characterize the quality with which base practices are performed. The Artifact Oriented Process Model for Testing - ArtProTest - is a generic software testing model defined at CenPRA by selecting software testing "best practices"; it evolved over the last years and has been published in specific forums. The ArtProTest, which defines a set of partially ordered activities and test artifacts, has been validated and improved based on the experience of its application at software development companies in Brazil. In this work we carried out an evaluation of ArtProTest under the perspective of ISO/IEC 15504 process improvement model. We evaluated essentially which aspects of ISO/IEC 15504 are taken into account by ArtProTest. We also evaluate how ArtProTest can be used to supplement software testing related aspects of ISO/IEC 15504 model. Our analysis results pointed to improvements in ArtProTest, and also identify testing task and artifacts not considered by ISO/IEC 15504, which can significantly improve an organization testing practices. 147154Argollo, M., Bueno, P.M.S., Crespo, A.N., Jino, M., Rosa, M., Borba, W., Uma Experiência de Implantação de Processo de Teste em Pequena Empresa (2006) Proc. Of: V Simpósio Brasileiro de Qualidade de Software, , Vila Velha, ES. (in Portuguese)Bueno, P.M.S., Crespo, A.N., Jino, M., Analysis on an artifact oriented test process model and of testing aspects of CMMI (2006) 7th International Conference on Product Focused Software Process Improvement, Amsterdam. At: Lecturer Notes in Computer Science, 4034, pp. 263-277. , Berlin: Springer-VerlagBurnstein, I., Suwanassart, T., Carlson, R., Developing a testing maturity model for software test process evaluation and improvement (1996) Proc. of International Test ConferenceCrespo Adalberto, N., Jino, M., Processo de teste de software (2005) Technical Report CenPRA, , (in Portuguese)(1998) IEEE Standard for Software Test Documentation, , IEEE Std 829 IEEE, New York(2005) Information Technology - Process Assessment - Part 5: An Exemplar Process Assessment Model, , ISO/IEC FDIS 15504-5 The International Organization for Standardization and the International Electrotechnical CommissionKoomen, T., Pol, M., (1999) Test Process Improvement: A Practical Step-by Step Guide to Structured Testing, , ACM Press, London, EnglandMyers, G.J., (1979) The Art of Software Testing, , Addison-Wesley, New YorkPaulk, M.C., Weber, C.V., Curtis, B., Chrissis, M., The capability maturity model - Guidelines for improving the software process (1994) CMU-SEI, , Addison-WesleyRocha, A.R.C., Maldonado, J.C., Weber, K.C., (2001) Qualidade de Software: Teoria e Prática, , Prentice Hall, (in Portuguese)Salviano Clênio, F., Introdução à melhoria de processo de software com ISO/IEC 15504 e CMMI (2004) Technical Report CenPRA - TRT1351, , (in Portuguese)(2006), SEI