"careful testing" is correct and usable in written English.
You could use it when referring to a process in which something is being tested in a detailed and meticulous manner. For example: "The product underwent careful testing before being launched to the public."
To produce such a system, the Bush administration must set aside its exaggerated expectations and commit itself to a program of careful testing and patient diplomacy.
But achieving that consistency has involved a long process of research and careful testing of the results with judges, lawyers and the general public.
But Gilenya has side effects that make it off limits for some patients and require careful testing and monitoring for heart, liver and eye problems.
Yet Silent Spring never advocated an outright ban on pesticides: only careful testing and informed use, in contrast to the scorched-earth policies that had been pursued, with many disastrous outcomes.
Findings await replication and more careful testing within a randomized controlled trial.
In microgravity lack of run-off of excess water requires careful testing of water dispensation and oxygen availability.
Inside a reference telescope, two different and innovative detectors were placed for careful tests.
In addition to data collected via questionnaire, a careful test content analysis was conducted based the interpretive model.
These comparisons also demonstrate the need to conduct careful tests on large-scale columns to eliminate some uncertainties associated with the existing test data to enable a more conclusive verification of the proposed theoretical column model.
On the other hand, variability of standardized test scores could remain unchanged due to careful test construction by the test developers.
Responses for almost 60 agents include examples of how careful tests in hPSC-cardiomyocytes have improved on existing in vitro assays, and how these cells have been integrated into high throughput imaging and electrophysiology industrial platforms.
