When can I retake test

[nusk3r]

There is no limit.
You can give the test when it is next available in your city, which would be 15 days.

Read here-

I am not happy with my pH score. Can I re-take the pH test?

There is no restriction on taking the pH test. You can take the pH test any number of times without restriction and during shortlisting,your best score will be considered. However in eLitmus’ experience, significant number of companies prefer to shortlist candidates who have taken no more than 3 attempts. Hence, no more than 3 attempts are recommended.