2 files changed, 5 insertions, 1 deletions
diff --git a/test/ruby/test_enumerator.rb b/test/ruby/test_enumerator.rb
index 0ee11dad36..51f69be37d 100644
--- a/test/ruby/test_enumerator.rb
+++ b/test/ruby/test_enumerator.rb
@@ -590,6 +590,8 @@ class TestEnumerator < Test::Unit::TestCase
     assert_equal 126, @sized.cycle(3).size
     assert_equal Float::INFINITY, [].to_enum { 42 }.cycle.size
     assert_equal 0, [].to_enum { 0 }.cycle.size
+
+    assert_raise(TypeError) {[].to_enum { 0 }.cycle("").size}
   end
 
   def test_size_for_loops
diff --git a/test/ruby/test_lazy_enumerator.rb b/test/ruby/test_lazy_enumerator.rb
index 4db58e7619..56890f4b6e 100644
--- a/test/ruby/test_lazy_enumerator.rb
+++ b/test/ruby/test_lazy_enumerator.rb
@@ -507,7 +507,9 @@ EOS
       def size; 0; end
       include Enumerable
     end
-    assert_equal 0, obj.lazy.cycle.size
+    lazy = obj.lazy
+    assert_equal 0, lazy.cycle.size
+    assert_raise(TypeError) {lazy.cycle("").size}
   end
 
   def test_map_zip