In a setback for Bayer, the U.S. Supreme Court has denied review of its petition in a case brought over Monsanto’s Roundup pesticide.

Tuesday’s decision ensures that court battles will continue over Roundup, which lawsuits contend causes non-Hodgkin lymphoma. Bayer reiterated its plan to consider a possible claims process to resolve future Roundup claims but, having won four verdicts in the past year from juries in California, Missouri and Oregon, has renewed optimism about its chances in court.