diff --git a/Library/Homebrew/cmd/update-report.rb b/Library/Homebrew/cmd/update-report.rb
index 7bd939f1ffc6a..4d664f2d5b9d0 100644
--- a/Library/Homebrew/cmd/update-report.rb
+++ b/Library/Homebrew/cmd/update-report.rb
@@ -820,6 +820,8 @@ def dump_new_formula_report
   end
 
   def dump_new_cask_report
+    return if Homebrew::SimulateSystem.simulating_or_running_on_linux?
+
     casks = select_formula_or_cask(:AC).sort.filter_map do |name|
       name.split("/").last unless cask_installed?(name)
     end
@@ -836,6 +838,8 @@ def dump_deleted_formula_report
   end
 
   def dump_deleted_cask_report
+    return if Homebrew::SimulateSystem.simulating_or_running_on_linux?
+
     casks = select_formula_or_cask(:DC).sort.filter_map do |name|
       name = name.split("/").last
       pretty_uninstalled(name) if cask_installed?(name)