Some tests will happen quite quickly because they are easy to arrange while others will take longer.
Sometimes test results lead to other tests or appointments, which may take more time.
The tests that you have to do will depend on how old you are, your health and how healthy you have been in the past.
It should take you about 4 months to get all your tests done, although it can take longer if you need to have more tests.
Some of these tests will be done at hospital, while others will be done at a laboratory.