diff --git a/lib/test.rb b/lib/test.rb
index 64690fad..33466600 100644
--- a/lib/test.rb
+++ b/lib/test.rb
@@ -489,6 +489,9 @@ def bottle_reinstall_formula(formula, new_formula)
       return if ARGV.include?("--no-bottle")
       return if formula.bottle_disabled?
 
+      if MacOS.version >= :catalina
+        ENV["HOMEBREW_BOTTLE_SUDO_PURGE"] = "1"
+      end
       root_url = ARGV.value("root-url")
       bottle_args = ["--verbose", "--json", formula.name]
       bottle_args << "--keep-old" if ARGV.include?("--keep-old") && !new_formula