The phrase "a lack of testing" is correct and usable in written English.
It can be used to describe a situation where testing has not been conducted or is insufficient, often in contexts related to quality assurance, software development, or research.
Example: "The product was released with a lack of testing, leading to numerous issues reported by users."
Alternatives: "insufficient testing" or "deficiency in testing".
Due to a lack of testing systems, however, households don't often know whether the removal system is working properly.
The European Union has named a dozen prefectures that need radiation tests, yet traders in these places report a lack of testing equipment.
Ian Thorpe of Australia made that plaintive complaint last week at the world swimming championships, questioning a lack of testing for the banned drug EPO, or erythropoietin, which increases oxygen-carrying capacity.
Chris Froome says that cyclists are determined to put the dark days of doping in the sport behind them, but are frustrated by a lack of testing.
Everyone took this as part of the usual conspiracy theory that Apple slows phones to get you to upgrade, but it turns out to have been more like a lack of testing before they shipped.
Arguments against dabbing for medical use usually center around a lack of testing of extract products.
Facing a lack of test tubes in our household, I set the table with apples, candles and heavy small gold stars I bought at a design store.
Currently, motivational research indicates that a lack of test-taking motivation can decrease students' performance in low-stakes assessments.
The worry for them is a lack of Test rugby - their last match was in the 2013 Six Nations.
In fact, omitted responses are often at least partially due to a lack of test-taking motivation (Jakewerth et al. 1999; Wise and DeMars 2005).
Although multistage triaxial tests have been used for soils for a long time, there is still a lack of test results for unbound granular non-traditional materials.
