"Stringent tests" refers to strict and demanding assessments or examinations that are very thorough and require strict criteria to be met in order to pass. Full definition
Adjustable side impact protection exceeds the most stringent tests in the world; Easily adjusts to five different positions, even with the infant in the seat, ensuring the best and safest fit. (babystrollersellect.com)
This portfolio has high standards of safety and stringent tests for inclusion. (tsinetwork.ca)
The supplements pass through stringent tests and guidelines to ensure perfection of the product and safety of the prospect customers. (hghenergizerplus.com)