2 files changed, 11 insertions, 2 deletions
diff --git a/test/-ext-/gvl/test_last_thread.rb b/test/-ext-/gvl/test_last_thread.rb
index f1bebafeea..f63d98aab1 100644
--- a/test/-ext-/gvl/test_last_thread.rb
+++ b/test/-ext-/gvl/test_last_thread.rb
@@ -15,8 +15,7 @@ class TestLastThread < Test::Unit::TestCase
       t1 = Time.now
       t = t1 - t0
 
-      assert_in_delta(1.0, t, 0.16)
+      assert_in_delta(1.0, t, 0.18)
     end;
   end
 end
-
diff --git a/test/ruby/test_zjit.rb b/test/ruby/test_zjit.rb
index e10e9a8742..6e0f274c30 100644
--- a/test/ruby/test_zjit.rb
+++ b/test/ruby/test_zjit.rb
@@ -714,6 +714,16 @@ class TestZJIT < Test::Unit::TestCase
     end
   end
 
+  def test_dupn
+    assert_compiles '[[1], [1, 1], :rhs, [nil, :rhs]]', <<~RUBY, insns: [:dupn]
+      def test(array) = (array[1, 2] ||= :rhs)
+
+      one = [1, 1]
+      start_empty = []
+      [test(one), one, test(start_empty), start_empty]
+    RUBY
+  end
+
   def test_send_backtrace
     backtrace = [
       "-e:2:in 'Object#jit_frame1'",