Sometimes you are exempt from the English language proficiency requirement. This could be the case:
When you completed at least five years of study in Australia, New Zealand, Canada, South Africa or the Republic of Ireland.
You’re a citizen and passport holder of the UK, USA, Canada, New Zealand or the Republic of Ireland.
Successfully completed the Senior Secondary Certificate of Education, or study at Certificate IV level or higher in Australia within two years of applying for a student visa.
You enrol full time in school studies as a principal course (including secondary exchange programs), postgraduate research or a standalone English Language Intensive Courses for Overseas Students (ELICOS) program.
If you are not on this list, you probably need to provide evidence of English language proficiency for your visa application.
Book IELTS for your visa