Test cases are failing while running it using headless mode

Test cases are failing while running it using headless mode.
Some cases are running but all cases are not getting pass.
Is there any settings which needs to be done

Headless browsers run slightly faster than headed browsers. Therefore, if your test case scripts do NOT wait for the changes in the browser’s state appropriately, it is likely that your tests fail due to some timing problems.

What’s the cause? — Nobody can tell any more about the cause because you haven’t disclosed your test script source and the error logs you got. Please following the guideline if you want further assistance: