Coping, crucial for managing stress and determining mental health outcomes, is commonly assessed using self-report instruments, raising concerns about susceptibility to response biases. While previous research has scrutinized coping assessments for biases like social desirability, this is the first exploration into the role of supernormality in coping self-reports. The current study investigated the impact of supernormality, an extreme form of positive response bias, on self-reported coping behaviors in a sample of 862 participants aged 18 to 71 years. Results indicate that 23.7% of the sample exhibited supernormality, highlighting its prevalence and relevance in psychological research. Supernormal respondents reported significantly higher reliance on problem-focused coping and significantly lower engagement in emotion-focused and avoidant coping compared to credible respondents. This pattern was particularly evident for specific coping strategies such as humor, venting, behavioral disengagement, denial, substance use, self-blame, and self-distraction. Overall, this study emphasizes the pervasive impact of response biases in seemingly neutral psychological phenomena and recommends nuanced approaches in research, incorporating alternative methodologies to enhance coping assessment validity. As such, our findings contribute valuable insights into the impact of response biases on coping behaviors, underscoring the need for meticulous consideration in both research and clinical applications.