The phrase "additional tests are required" is correct and usable in written English.
You can use it in contexts where further testing or evaluation is necessary, such as in medical, scientific, or technical discussions.
Example: "Before we can proceed with the treatment, additional tests are required to ensure the correct diagnosis."
Alternatives: "further tests are needed" or "more tests are necessary."
Thermal annealing at +80 to (+100^{circ}mbox{C}) seems to be the most effective, but some additional tests are required to optimize the thermal annealing for radiation damaged APDs.
Healthy People 2020) However, additional tests are required to determine if the annual file can substitute for either of the multi-year data cycles with respect to monitoring age-adjusted trends relevant to hospitalizations or emergency department visits, both of which are monitored by the NCIPC.
In 50% of nations, additional tests are required.
As a consequence, large amounts of additional tests are required.
Additional tests are required to identify XDR cases, among them molecular tests like MTBDR sl that include the detection of mutations in gyrA associated to FQ-R and rrs associated with AM, KM and CM resistance.
While additional tests are required before a final answer can be given, the detection of syncytia in B K cultures clearly indicates a strong likelihood that rinderpest virus is replicating in the cultures without immune serum and that the virus has been isolated.
She asked if they could stay with me for a few days if additional tests were required.
Nevertheless, the authors suggested that additional tests were required to determine if this hypothesis is correct.
Blatter asserted that the financial implications of installing the technology were too high; additional testing was required; that technology would interrupt the flow of the game; and even, that people like to debate controversial decisions.
This material could eventually replace the Nickel Aluminum Bronze (NAB) currently used in many naval propulsion systems, however, additional testing is required to validate the alloy's performance characteristics.
