COMMONALITY TEST

commonality test. The requirement that members of a group certified as a class in a class-action suit share at least one issue of law or fact whose resolution will affect all or a significant number of the putative class members. Cf. COMMON-CHARACTER REQUIREMENT. [Cases: Parties 35.17, 35.61–35.89. C.J.S. Parties §§ 31, 34–35.]