1 files changed, 9 insertions, 0 deletions
diff --git a/test/fiddle/helper.rb b/test/fiddle/helper.rb
index f7143f2422..0ea3bf57f4 100644
--- a/test/fiddle/helper.rb
+++ b/test/fiddle/helper.rb
@@ -1,4 +1,6 @@
 # frozen_string_literal: true
+
+require 'rbconfig/sizeof'
 require 'test/unit'
 require 'fiddle'
 
@@ -165,5 +167,12 @@ module Fiddle
         GC.start
       end
     end
+
+    def under_gc_stress
+      stress, GC.stress = GC.stress, true
+      yield
+    ensure
+      GC.stress = stress
+    end
   end
 end