diff --git a/download-test_readline.sh b/download-test_readline.sh
index d379a41d43..be0bac2243 100644
--- a/download-test_readline.sh
+++ b/download-test_readline.sh
@@ -4,17 +4,24 @@ mkdir -p ./test/ext/readline
 wget https://raw.githubusercontent.com/ruby/ruby/trunk/test/readline/helper.rb -P ./test/ext/readline
 wget https://raw.githubusercontent.com/ruby/ruby/trunk/test/readline/test_readline.rb -P ./test/ext/readline
 wget https://raw.githubusercontent.com/ruby/ruby/trunk/test/readline/test_readline_history.rb -P ./test/ext/readline
+
 mkdir -p ./tool/
 wget https://raw.githubusercontent.com/ruby/ruby/trunk/tool/colorize.rb -P ./tool
+
 mkdir -p ./tool/lib/
 wget https://raw.githubusercontent.com/ruby/ruby/trunk/tool/lib/leakchecker.rb -P ./tool/lib
 wget https://raw.githubusercontent.com/ruby/ruby/trunk/tool/lib/envutil.rb -P ./tool/lib
+wget https://raw.githubusercontent.com/ruby/ruby/trunk/tool/lib/colorize.rb -P ./tool/lib
 wget https://raw.githubusercontent.com/ruby/ruby/trunk/tool/lib/find_executable.rb -P ./tool/lib
+
 mkdir -p ./tool/lib/unit/minitest
 wget https://raw.githubusercontent.com/ruby/ruby/trunk/tool/lib/minitest/unit.rb -P ./tool/lib/minitest
+
 mkdir -p ./tool/lib/unit/test
 wget https://raw.githubusercontent.com/ruby/ruby/trunk/tool/lib/test/unit.rb -P ./tool/lib/test
 wget https://raw.githubusercontent.com/ruby/ruby/trunk/tool/lib/test/unit/assertions.rb -P ./tool/lib/test/unit
+wget https://raw.githubusercontent.com/ruby/ruby/trunk/tool/lib/test/unit/core_assertions.rb -P ./tool/lib/test/unit
 wget https://raw.githubusercontent.com/ruby/ruby/trunk/tool/lib/test/unit/parallel.rb -P ./tool/lib/test/unit
 wget https://raw.githubusercontent.com/ruby/ruby/trunk/tool/lib/test/unit/testcase.rb -P ./tool/lib/test/unit
+
 echo "-- Finish download test/readline --"