diff --git a/cmd/brew-test-bot.rb b/cmd/brew-test-bot.rb
index 7d4047ae..eaad7f8f 100755
--- a/cmd/brew-test-bot.rb
+++ b/cmd/brew-test-bot.rb
@@ -1504,7 +1504,6 @@ def sanitize_argv_and_env
     ENV["HOMEBREW_DEVELOPER"] = "1"
     ENV["HOMEBREW_NO_AUTO_UPDATE"] = "1"
     ENV["HOMEBREW_NO_EMOJI"] = "1"
-    ENV["HOMEBREW_LINKAGE_CACHE"] = "1"
     ENV["HOMEBREW_FAIL_LOG_LINES"] = "150"
     ENV["PATH"] =
       "#{HOMEBREW_PREFIX}/bin:#{HOMEBREW_PREFIX}/sbin:#{ENV["PATH"]}"