English proficiency test; English proficiency examination
Refers to a formal test of English ability, such as the EIKEN or similar institutional exams.
I plan to take the English proficiency test next month.
The results of the English proficiency test arrived.
Common abbreviation for the EIKEN test specifically; 英語検定試験 is the full, formal term.
Compound of 英語 (English) + 検定 (certification, proficiency test) + 試験 (examination).