diff --git a/test/ruby/test_gc.rb b/test/ruby/test_gc.rb
index 811ab3edad48d8..8d315fa925196e 100644
--- a/test/ruby/test_gc.rb
+++ b/test/ruby/test_gc.rb
@@ -438,6 +438,7 @@ def test_gc_parameter_init_slots
       while GC.stat_heap(0, :heap_allocatable_pages) != 0
         ary << Object.new
       end
+      ary.clear
       ary = nil
 
       # Clear all the objects that were allocated.