diff --git a/test/irb/yamatanooroti/test_rendering.rb b/test/irb/yamatanooroti/test_rendering.rb
index 6d1a0a1d7..9e0994886 100644
--- a/test/irb/yamatanooroti/test_rendering.rb
+++ b/test/irb/yamatanooroti/test_rendering.rb
@@ -17,8 +17,6 @@ def setup
       @irbrc_backup = ENV['IRBRC']
       @irbrc_file = ENV['IRBRC'] = File.join(@tmpdir, 'temporaty_irbrc')
       File.unlink(@irbrc_file) if File.exist?(@irbrc_file)
-      @ruby_file = File.join(@tmpdir, 'ruby_file.rb')
-      File.unlink(@ruby_file) if File.exist?(@ruby_file)
     end
 
     def teardown
@@ -237,234 +235,13 @@ def test_assignment_expression_truncate
       EOC
     end
 
-    def test_debug
-      write_ruby <<~'RUBY'
-        puts "start IRB"
-        binding.irb
-        puts "Hello"
-      RUBY
-      start_terminal(25, 80, %W{ruby -I#{@pwd}/lib #{@ruby_file}}, startup_message: 'start IRB')
-      write("debug\n")
-      write("next\n")
-      close
-      assert_include_screen(<<~EOC)
-        (rdbg) next    # command
-        [1, 3] in #{@ruby_file}
-             1| puts "start IRB"
-             2| binding.irb
-        =>   3| puts "Hello"
-      EOC
-    end
-
-    def test_break
-      write_ruby <<~'RUBY'
-        puts "start IRB"
-        binding.irb
-        puts "Hello"
-        puts "World"
-      RUBY
-      start_terminal(25, 80, %W{ruby -I#{@pwd}/lib #{@ruby_file}}, startup_message: 'start IRB')
-      write("break 3\n")
-      write("continue\n")
-      close
-      assert_include_screen(<<~EOC)
-        (rdbg:irb) break 3
-        #0  BP - Line  #{@ruby_file}:3 (line)
-      EOC
-      assert_include_screen(<<~EOC)
-        (rdbg) continue    # command
-        [1, 4] in #{@ruby_file}
-             1| puts "start IRB"
-             2| binding.irb
-        =>   3| puts "Hello"
-             4| puts "World"
-        =>#0    <main> at #{@ruby_file}:3
-
-        Stop by #0  BP - Line  #{@ruby_file}:3 (line)
-      EOC
-    end
-
-    def test_delete
-      write_ruby <<~'RUBY'
-        puts "start IRB"
-        binding.irb
-        puts "Hello"
-        binding.irb
-        puts "World"
-      RUBY
-      start_terminal(25, 80, %W{ruby -I#{@pwd}/lib #{@ruby_file}}, startup_message: 'start IRB')
-      write("break 5\n")
-      write("continue\n")
-      write("delete 0\n")
-      close
-      assert_include_screen(<<~EOC.strip)
-        (rdbg:irb) delete 0
-        deleted: #0  BP - Line
-      EOC
-    end
-
-    def test_next
-      write_ruby <<~'RUBY'
-        puts "start IRB"
-        binding.irb
-        puts "Hello"
-        puts "World"
-      RUBY
-      start_terminal(25, 80, %W{ruby -I#{@pwd}/lib #{@ruby_file}}, startup_message: 'start IRB')
-      write("next\n")
-      close
-      assert_include_screen(<<~EOC)
-        (rdbg:irb) next
-        [1, 4] in #{@ruby_file}
-             1| puts "start IRB"
-             2| binding.irb
-        =>   3| puts "Hello"
-             4| puts "World"
-        =>#0    <main> at #{@ruby_file}:3
-      EOC
-    end
-
-    def test_step
-      write_ruby <<~'RUBY'
-        puts "start IRB"
-        def foo
-          puts "Hello"
-        end
-        binding.irb
-        foo
-        puts "World"
-      RUBY
-      start_terminal(25, 80, %W{ruby -I#{@pwd}/lib #{@ruby_file}}, startup_message: 'start IRB')
-      write("step\n")
-      close
-      assert_include_screen(<<~EOC)
-        (rdbg:irb) step
-        [1, 7] in #{@ruby_file}
-             1| puts "start IRB"
-             2| def foo
-        =>   3|   puts "Hello"
-             4| end
-             5| binding.irb
-      EOC
-    end
-
-    def test_continue
-      write_ruby <<~'RUBY'
-        puts "start IRB"
-        binding.irb
-        puts "Hello"
-        binding.irb
-        puts "World"
-      RUBY
-      start_terminal(25, 80, %W{ruby -I#{@pwd}/lib #{@ruby_file}}, startup_message: 'start IRB')
-      write("continue\n")
-      close
-      assert_include_screen(<<~EOC)
-        (rdbg:irb) continue
-        Hello
-
-        From: #{@ruby_file} @ line 4 :
-
-            1: puts "start IRB"
-            2: binding.irb
-            3: puts "Hello"
-         => 4: binding.irb
-            5: puts "World"
-      EOC
-    end
-
-    def test_finish
-      write_ruby <<~'RUBY'
-        puts "start IRB"
-        def foo
-          binding.irb
-          puts "Hello"
-        end
-        foo
-        puts "World"
-      RUBY
-      start_terminal(25, 80, %W{ruby -I#{@pwd}/lib #{@ruby_file}}, startup_message: 'start IRB')
-      write("finish\n")
-      close
-      assert_include_screen(<<~EOC)
-        (rdbg:irb) finish
-        Hello
-        [1, 7] in #{@ruby_file}
-             1| puts "start IRB"
-             2| def foo
-             3|   binding.irb
-             4|   puts "Hello"
-        =>   5| end
-             6| foo
-      EOC
-    end
-
-    def test_backtrace
-      write_ruby <<~'RUBY'
-        puts "start IRB"
-        def foo
-          binding.irb
-        end
-        foo
-      RUBY
-      start_terminal(25, 80, %W{ruby -I#{@pwd}/lib #{@ruby_file}}, startup_message: 'start IRB')
-      write("backtrace\n")
-      close
-      assert_include_screen(<<~EOC)
-        (rdbg:irb) backtrace
-        =>#0    Object#foo at #{@ruby_file}:3
-          #1    <main> at #{@ruby_file}:5
-      EOC
-    end
-
-    def test_info
-      write_ruby <<~'RUBY'
-        puts "start IRB"
-        a = 1
-        binding.irb
-      RUBY
-      start_terminal(25, 80, %W{ruby -I#{@pwd}/lib #{@ruby_file}}, startup_message: 'start IRB')
-      write("info\n")
-      close
-      assert_include_screen(<<~EOC)
-        (rdbg:irb) info
-        %self = main
-        a = 1
-      EOC
-    end
-
-    def test_catch
-      write_ruby <<~'RUBY'
-        puts "start IRB"
-        binding.irb
-        raise NotImplementedError
-      RUBY
-      start_terminal(25, 80, %W{ruby -I#{@pwd}/lib #{@ruby_file}}, startup_message: 'start IRB')
-      write("catch NotImplementedError\n")
-      write("continue\n")
-      close
-      assert_include_screen(<<~EOC)
-        Stop by #0  BP - Catch  "NotImplementedError"
-      EOC
-    end
-
     private
 
-    def assert_include_screen(expected)
-      assert_include(result.join("\n"), expected)
-    end
-
     def write_irbrc(content)
       File.open(@irbrc_file, 'w') do |f|
         f.write content
       end
     end
-
-    def write_ruby(content)
-      File.open(@ruby_file, 'w') do |f|
-        f.write content
-      end
-    end
   end
 rescue LoadError, NameError
   # On Ruby repository, this test suit doesn't run because Ruby repo doesn't