Background: The “Migrants’ Approached Self-Learning Intervention in HIV/AIDS for Tajiks (MASLIHAT)” recruits and trains male Tajik migrants who inject drugs as peer educators (PEs) in delivering HIV prevention information and encouragement to adopt risk-reduction norms within their diaspora social networks while reducing their own HIV risk. Reduced rates of syringe sharing and condomless sex among MASLIHAT participants were reported previously. This analysis examines the effect of the intervention on HIV testing among the participants’ female sex partners. Methods: The MASLIHAT intervention was tested in Moscow in a cluster-randomized controlled trial with 12 recruitment sites assigned to either the MASLIHAT intervention or comparison health education training (TANSIHAT). Tajik male migrants who inject drugs (N=140) were recruited to attend the 5-session MASLIHAT or TANSIHAT training and to recruit two network members (NMs) who inject drugs with the intent of sharing the information and positive strategies for change they learned (n=280). All 420 participants were interviewed at baseline and referred to HIV counseling and testing. Follow-up interviews were conducted at 3-month intervals for 1 year. Modified mixed effects Poisson regression analyses adjusted for participant type and network clustering compared the proportions of participants with a regular female sex partner in each condition who reported that their partner had been tested for HIV. Results: Of the 420 participants, 108 (26%) reported sex with a primary female partner during the study. Prior to the intervention, 4 (4%) indicated that their partner had been tested for HIV. At 3-month follow-up, 70% of MASLIHAT and 28% of TANSIHAT participants with a regular female partner reported their partner had been tested for HIV. At 12-month follow-up, testing increased to 94% for MASLIHAT and 59% for TANSIHAT. Regression analyses indicated that MASLIHAT participants were significantly more likely to report partner HIV testing at the 3-month follow-up (IRR=2.60, 95% CI 1.41-4.78) and testing increased significantly over the follow-up period in both conditions (Chi2(3)=26.69, p<0.0001). Conclusions: The MASLIHAT intervention for male Tajik migrants who inject drugs doubled the rate of female partner HIV testing compared to participation in HIV counseling and testing paired with a non-HIV focused health education intervention.