This mostly depends on the national requirements and university requirements. Most schools abroad require international students to take TOEFL or IELTS while they consider your application. Also, universities also take into consideration the country in which you would come from in case you decide to waive your TOEFL test. It is essential to prove your proficiency in English, in the case you fail to do an English test you may have to prove that you have learned English through your school years prior to entering university. My advice: Take either TOEFL or IELTS if you must, it makes the application process less tedious. If you can't you may have to look for universities that offer alternatives for this situation.