At Studieskolen you can take the test you need before applying for a place in a study exchange programme or acceptance into the CEMS programme.
If you need an English test, you have to take a TOEFL test or a Cambridge English Qualification Test.
If you wish to study abroad, you are usually required to be at least at level B2 in order to apply for a study exchange programme. You can see the requirements of each university here.
If you are applying for the CEMS programme, the minimum language requirement is level B1 in both writing and in speaking.
The levels are defined by the Common European Framework of Reference.