Within the scope of educational testing and assessment, setting standards and creating guidelines as a code of practice provide more prolific and sustainable outcomes. In this sense, internationally accepted and regionally accredited principles are suggested for standardization in language testing and assessment practices. Herein, ILTA guidelines for good practice proposed by International Language Testing Association (2007), ALTE code of practice by Association of Language Testers in Europe (1994), JLTA code of good testing practices by Japanese Language Testing Association (2002) and EALTA guidelines for good practice by European Association for Language Testing and Assessment (2006) can be cited. Amidst them, the EALTA guidelines have been adopted to 'frame a validity study' (Alderson, 2010: 63) for language testing and assessment practices. In this sense, due to the abundance of guidelines and principles, it is expected to see myriad of practices to be well-implemented and documented. However, documentation on aforementioned practical cases is rare with a few empirical studies conducted (Alderson & Banerjee, 2008; Alderson; 2010; De Jong & Zheng, 2011). Accordingly, in this paper, a practical case study on YDS (foreign language exam in Turkey) is applied regarding the EALTA guidelines with a special concern on the development of tests in national and/or institutional testing units or centers. It is, therefore, aimed to tackle the question whether YDS adheres the principles purported by EALTA with its probable high-stake consequences. Thus, the results have indicated that taking the EALTA guidelines in the course of the test development process as baseline promotes value-added language testing and assessment practices.