diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 5cfaeabad64..452a8906a94 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -25,7 +25,6 @@ jobs:
 
     env:
       DISCOURSE_HOSTNAME: www.example.com
-      RUBY_GLOBAL_METHOD_CACHE_SIZE: 131072
       RAILS_ENV: test
       PGUSER: discourse
       PGPASSWORD: discourse
diff --git a/script/bench.rb b/script/bench.rb
index 6e10dcd1125..ba0c5abcd14 100644
--- a/script/bench.rb
+++ b/script/bench.rb
@@ -135,7 +135,6 @@ discourse_env_vars = %w[
   RUBY_GC_MALLOC_LIMIT_GROWTH_FACTOR
   RUBY_GC_OLDMALLOC_LIMIT_GROWTH_FACTOR
   RUBY_GC_HEAP_OLDOBJECT_LIMIT_FACTOR
-  RUBY_GLOBAL_METHOD_CACHE_SIZE
   LD_PRELOAD
 ]
 
@@ -143,7 +142,6 @@ if @include_env
   puts "Running with tuned environment"
   discourse_env_vars.each { |v| ENV.delete v }
 
-  ENV["RUBY_GLOBAL_METHOD_CACHE_SIZE"] = "131072"
   ENV["RUBY_GC_HEAP_GROWTH_MAX_SLOTS"] = "40000"
   ENV["RUBY_GC_HEAP_INIT_SLOTS"] = "400000"
   ENV["RUBY_GC_HEAP_OLDOBJECT_LIMIT_FACTOR"] = "1.5"