The phrase "a significant test of" is correct and usable in written English.
It can be used when discussing an evaluation or assessment that holds considerable importance or impact in a particular context.
Example: "The upcoming election will be a significant test of the candidates' ability to connect with voters."
Alternatives: "a crucial assessment of" or "an important evaluation of".
The ICC's first case is being seen as a significant test of its credibility, and has already attracted controversy.
Risen refused to coöperate and, with that, U.S. v. Sterling became a significant test of whether or when reporters have a right to protect confidential sources.
"It's going to make this a significant test of how the president juggles this and Iraq at the same moment," a senior official said.
The demonstrators adopted a sunflower as the symbol of their movement and this month's elections will be a significant test of its strength.
The $13.9 million project, financed in part by the Department of Energy, will be a significant test of the technologies that have been developed to transform high temperature superconductors, which are by nature brittle and stiff, into flexible wires.
But now this campy and eternally popular song has become the centerpiece of what could be a significant test of copyright law.
Overall, categories of WHR were not significantly associated with the risk of breast cancer but there was a marginally significant test of trend for a positive association between increasing WHR and breast cancer risk.
A significant test indicated that rate of occurrence was not independent of taxon.
The benefit from GD compared to D was considerably larger in patients with a G responsive profile, and this heterogeneity was confirmed by a statistically significant test of interaction between this panel and treatment for OS.
Global tests for positive selection provided evidence for historical selection on the DAB region with a significant test statistic (d N -d S ) of 2.08 (P-value = 0.020).
Only subgroup analyses showing a statistically significant test of interaction (P<0.05) were considered to provide evidence of an intervention effect.
