The TestDaF is an advanced-level language exam. It covers levels B2 to C1 on the six-level scale of competence laid down in the Common European Framework of Reference for Languages (CEFR).
The certificate issued upon successful completion of all four sections of the TestDaF exam at TestDaF level 4 will act as evidence of the language skills needed to gain admission to almost any subject and degree course at universities and institutions of higher education in Germany. The TestDaF language exam also provides internationally recognized evidence that your knowledge of German is sufficient to complete scientific projects and enter academic professions.
No specialized knowledge is required to take the exam.
The TestDaF exam can only be taken at licenced test centers. Currently there are around 450 test centers that offer the exam. You can search for test centers in Germany and around the world below:
Test centers in Germany
Test centers around the world
Practice materials and recommended reading are available here.