Political decentralization in African countries has the potential to transform the relationship between citizens and their representatives. But scholars have yet to fully understand whether or how voters adapt to the accountability demands imposed by having to elect representatives at multiple levels of government. Do voter assessments of local politicians depend on coethnicity, as prior studies have shown with national politicians? Are voters willing to update their assessments of incumbent performance based on new information? To answer such questions, we examine how voter evaluations of local incumbents are conditioned by information and partisanship. An experimental survey design presented respondents in two Kenyan counties, Uasin Gishu and Trans Nzoia, with randomized positive versus negative information about the performance of incumbent county governors in the run-up to the 2017 elections. The results show that some voters are willing to update their vote preference based on positive information about incumbent performance. However, these effects are found almost exclusively in Trans Nzoia, where exposure to positive information significantly increases the likelihood of voting for the incumbent even among non-coethnics, non-copartisans, and respondents with prior negative evaluations of the incumbent. In Uasin Gishu, by contrast, we find no such effects. We postulate that the differences between the two counties may be driven by distinct patterns in the distribution of political support for the two incumbents.