There are a plethora of synonyms for the phrase "doth tests," which means to perform tests or assessments. Some commonly used terms include "conducts evaluations," "runs diagnostics," "carries out experiments," "administers examinations," "analyzes data," "measures performance," and "assesses proficiency." Other phrases that can be used interchangeably with "doth tests" include "performs measurements," "conducts analysis," and "carries out assessments." These alternatives can help add variety to writing or conversation and can aid in avoiding redundancy. Ultimately, the choice of synonym will depend on the context in which it is used and the overall tone of the piece.