diff --git a/leetcode-ruby.gemspec b/leetcode-ruby.gemspec
index 7c34ef1d..13c32e6d 100644
--- a/leetcode-ruby.gemspec
+++ b/leetcode-ruby.gemspec
@@ -5,7 +5,7 @@ require 'English'
 ::Gem::Specification.new do |s|
   s.required_ruby_version = '>= 3.0'
   s.name = 'leetcode-ruby'
-  s.version = '6.5.1.1'
+  s.version = '6.5.1.2'
   s.license = 'MIT'
   s.files = ::Dir['lib/**/*.rb'] + %w[README.md]
   s.executable = 'leetcode-ruby'
diff --git a/test/easy/test_21_merge_two_sorted_lists.rb b/test/easy/test_21_merge_two_sorted_lists.rb
index 836c1740..5c7b9558 100644
--- a/test/easy/test_21_merge_two_sorted_lists.rb
+++ b/test/easy/test_21_merge_two_sorted_lists.rb
@@ -5,7 +5,7 @@
 require 'minitest/autorun'
 
 class MergeTwoSortedListsTest < ::Minitest::Test
-  def test_default
+  def test_default_one
     assert(
       ::ListNode.are_equals(
         ::ListNode.from_array(