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Background: To meet global targets for the elimination of mother-to-child HIV transmission, tailored approaches to HIV testing strategies need prioritizing. Herein, we sought to identify individual-level factors associated with male partner HIV testing., Methods: We conducted a secondary analysis of data from two parallel randomized trials of pregnant women living with HIV and those HIV-negative in Lusaka, Zambia. Across both trials, control groups received partner notification services only, while intervention groups received partner notification services plus HIV self-test kits for their partners. Associations between baseline factors and male partner testing were estimated using a probability difference. The outcome of interest was uptake of male partner HIV testing of any kind within 30 days of randomization., Results: The parent study enrolled 326 participants. Among the 151 women in the control groups, no clear associations were noted between maternal or male partner characteristics and reported uptake of male partner HIV testing. There were positive trends favouring partner testing among women who completed primary school education, had larger households (>2 members), and whose partners were circumcised. Likewise, no clear predictors of male partner testing were identified among the 149 women in the intervention groups. However, negative trends favouring no testing were noted among older, multiparous women from larger households., Conclusion: No consistent predictors for male partner HIV testing across two compared strategies were observed. Our findings suggest that differentiated strategies for male partner HIV testing may not be necessary. Instead, consideration should be given to universal approaches when bringing such services to scale., Competing Interests: Declaration of conflicting interestsThe author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.