Refined test [Bug #18140]

1 files changed, 4 insertions, 1 deletions

diff --git a/test/ruby/test_array.rb b/test/ruby/test_array.rb
index 4cb49046f1..a97a9c2558 100644
--- a/test/ruby/test_array.rb
+++ b/test/ruby/test_array.rb
@@ -656,7 +656,10 @@ class TestArray < Test::Unit::TestCase
     assert_raise(FrozenError) { @cls[0].freeze.concat(:foo) }
 
     a = @cls[nil]
-    def (x = Object.new).to_ary; Array.new(10) {nil} << :ok; end
+    def (x = Object.new).to_ary
+      ary = Array.new(2)
+      ary << [] << [] << :ok
+    end
     EnvUtil.under_gc_stress {a.concat(x)}
     GC.start
     assert_equal(:ok, a.last)