The phrase "a vigorous testing" is correct and usable in written English.
It can be used when referring to a thorough and energetic examination or evaluation of something, such as a product or process.
Example: "The software underwent a vigorous testing phase to ensure all bugs were identified and resolved before the launch."
Alternatives: "a thorough testing" or "an extensive testing".
"Unfortunately, the hospital called them so I pleaded with them and they made me do a vigorous test.
An experimental design was used based on cardiac surgery patients in the first 4 hours after surgery, in which cardiac output was managed using four different therapeutic interventions - fluid bolus, vasoconstrictor, vasodilator and inotrope - which should have provided a vigorous test of trending ability when compared with the alternative of sampling at regular time intervals.
Even as some scientists and advocates for women began arguing that at least there should be a more vigorous test of the estrogen hypothesis, it retained its power.
After months of refinement, and enthusiastically vigorous testing, we will have a fully formed, silicone coated, USB rechargeable waterproof pleasure product ready to go onto the shelves of a shop that you might shy away from as you walk past, unless nobody's watching.
Following news that Chambers was receiving new, legal nutritional supplements from Victor Conte, the Hamburg Sea Devils confirmed that Chambers would undergo a vigorous drug testing regime.
He continued to find support from the U.S. government and military research establishment, particularly for his advocacy for nuclear energy development, a strong nuclear arsenal, and a vigorous nuclear testing program.
In order to stream the athletes, they have to go through vigorous testing of function and movement from a sporting medical professional who then gives them a classification.
British head coach van Commenee stated that Chambers had undergone vigorous testing and that his performance sent "a message that you can win and break European records in the proper way".
Vigorous testing of that theory bears out the warning.
