2 files changed, 4 insertions, 2 deletions
diff --git a/test/ruby/test_array.rb b/test/ruby/test_array.rb
index 0922cb4c65..d2af339a11 100644
--- a/test/ruby/test_array.rb
+++ b/test/ruby/test_array.rb
@@ -2654,7 +2654,8 @@ class TestArray < Test::Unit::TestCase
   def test_dig
     h = @cls[@cls[{a: 1}], 0]
     assert_equal(1, h.dig(0, 0, :a))
-    assert_nil(h.dig(1, 0))
+    assert_nil(h.dig(2, 0))
+    assert_raise(TypeError) {h.dig(1, 0)}
   end
 
   private
diff --git a/test/ruby/test_hash.rb b/test/ruby/test_hash.rb
index c08908fa76..01990618fb 100644
--- a/test/ruby/test_hash.rb
+++ b/test/ruby/test_hash.rb
@@ -1305,7 +1305,8 @@ class TestHash < Test::Unit::TestCase
   def test_dig
     h = @cls[a: @cls[b: [1, 2, 3]], c: 4]
     assert_equal(1, h.dig(:a, :b, 0))
-    assert_nil(h.dig(:c, 1))
+    assert_nil(h.dig(:b, 1))
+    assert_raise(TypeError) {h.dig(:c, 1)}
     o = Object.new
     def o.dig(*args)
       {dug: args}