To this day, there are only a few studies that have used a controlled instructional intervention on specific linguistic structures to investigate if language instruction is beneficial for heritage learners (HLs), in the same way it is for second (L2) language learners, and more research in this area is rapidly needed (Bowles, 2018). The results from this small body of research suggest that explicit language instruction can be beneficial for HLs, but overall L2 learners still appear to benefit from language instruction more than their HLs counterparts (Potowski et al., 2009; Torres, 2018, inter alia). The present study seeks to contribute to this growing body of research and further examines if the type of task employed to measure learning gains plays a role in the uneven outcomes heritage and L2 learners evidence after receiving language instruction.