diff --git a/Formula/z/zim.rb b/Formula/z/zim.rb
index e263b08546b99..1e6e0fa69271c 100644
--- a/Formula/z/zim.rb
+++ b/Formula/z/zim.rb
@@ -61,7 +61,8 @@ def install
   end
 
   test do
-    ENV["LC_ALL"] = "en_US.UTF-8"
+    # Workaround for https://github.com/zim-desktop-wiki/zim-desktop-wiki/issues/2665
+    ENV["LC_ALL"] = (OS.mac? && MacOS.version >= :sequoia) ? "C" : "en_US.UTF-8"
     ENV["LANG"] = "en_US.UTF-8"
 
     mkdir_p %w[Notes/Homebrew HTML]