p. 8 of the application guide:http://www.cic.gc.ca/english/pdf/kits/guides/EG7.pdf
"You must submit language test results from a designated testing agency to the CIO with your application.
For your application to be eligible for processing, you must include the results of one of the following language tests from a testing agency designated by CIC:
IELTS: International English Language Testing System (General Training test only)
CELPIP: Canadian English Language Proficiency Index Program (General test only)
TEF: Test d‟évaluation de français
If you do not submit the results of your official language proficiency test with your application to the CIO, your application will not be processed and will be returned to you as incomplete."