1 files changed, 3 insertions, 7 deletions
diff --git a/test/ruby/test_hash.rb b/test/ruby/test_hash.rb
index 25dfaf4f64..3458053fea 100644
--- a/test/ruby/test_hash.rb
+++ b/test/ruby/test_hash.rb
@@ -113,13 +113,8 @@ class TestHash < Test::Unit::TestCase
     assert_equal(2, h[1])
   end
 
-  def test_dup_will_rehash
-    set1 = @cls[]
-    set2 = @cls[set1 => true]
-
-    set1[set1] = true
-
-    assert_equal set2, set2.dup
+  def test_dup_will_not_rehash
+    assert_hash_does_not_rehash(&:dup)
   end
 
   def assert_hash_does_not_rehash
@@ -480,6 +475,7 @@ class TestHash < Test::Unit::TestCase
     h1 = @cls[h => 1]
     assert_equal(h1, h1.dup)
     h[1] = 2
+    h1.rehash
     assert_equal(h1, h1.dup)
   end