Using fictitious country names in hypothetical scenarios is widespread in experimental international relations research. We survey sixty-four peer-reviewed articles to find that it is justified by reference to necessary “neutralization” compared to real-world scenarios. However, this neutralization effect has not been independently tested. Indeed, psychology and toponymy scholarship suggest that names entail implicit cues that can inadvertently bias survey results. We use a survey experiment to test neutralization and naming effects. We find not only limited evidence for neutralization, but also little evidence for systematic naming effects. Instead, we find that respondents were often more willing to support using force against fictitious countries than even adversarial real-world countries. Real-world associations may provide a “deterrent” effect not captured by hypothetical scenarios with fictitious country names. In turn, fictionalization may decrease the stakes as experienced by respondents. Researchers should therefore carefully explain rationales for and expected effects of fictitious country names, and test their fictitious names independently.