diff --git a/test/ruby/test_gc_compact.rb b/test/ruby/test_gc_compact.rb
index 3eaa93dfae..32b0a5def0 100644
--- a/test/ruby/test_gc_compact.rb
+++ b/test/ruby/test_gc_compact.rb
@@ -324,7 +324,7 @@ class TestGCCompact < Test::Unit::TestCase
       }.resume
 
       stats = GC.verify_compaction_references(expand_heap: true, toward: :empty)
-      assert_operator(stats.dig(:moved_up, :T_ARRAY) || 0, :>=, ARY_COUNT - 10)
+      assert_operator(stats.dig(:moved_up, :T_ARRAY) || 0, :>=, ARY_COUNT - 15)
       refute_empty($arys.keep_if { |o| ObjectSpace.dump(o).include?('"embedded":true') })
     end;
   end
@@ -356,7 +356,7 @@ class TestGCCompact < Test::Unit::TestCase
 
       stats = GC.verify_compaction_references(expand_heap: true, toward: :empty)
 
-      assert_operator(stats.dig(:moved_up, :T_OBJECT) || 0, :>=, OBJ_COUNT - 10)
+      assert_operator(stats.dig(:moved_up, :T_OBJECT) || 0, :>=, OBJ_COUNT - 15)
       refute_empty($ary.keep_if { |o| ObjectSpace.dump(o).include?('"embedded":true') })
     end;
   end
@@ -377,7 +377,7 @@ class TestGCCompact < Test::Unit::TestCase
 
       stats = GC.verify_compaction_references(expand_heap: true, toward: :empty)
 
-      assert_operator(stats[:moved_up][:T_STRING], :>=, STR_COUNT - 10)
+      assert_operator(stats[:moved_up][:T_STRING], :>=, STR_COUNT - 15)
       refute_empty($ary.keep_if { |o| ObjectSpace.dump(o).include?('"embedded":true') })
     end;
   end