Diagnostic Tests are set of formal and informal assessment to guide learning instructions that supports teachers and students’ academic strengths and needs.

A diagnostic test is a test that helps the teacher and learners identify problems that they have with the language.

At the start of the course, the teacher gives the learners a diagnostic test to see what areas of language need to be in the syllabus.

In the classroom, progress tests given during the course can also act as diagnostic tests as they help the teacher and learners identify what areas will be looked at next on the course.