diff --git a/ChangeLog b/ChangeLog
index e33c5ddd2d..cc11049b79 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon May 26 07:59:34 2014  Tanaka Akira  <akr@fsij.org>
+
+	* test/lib/minitest/unit.rb: Show Finished threads line-by-line.
+
 Mon May 26 01:39:02 2014  Zachary Scott  <e@zzak.io>
 
 	* lib/csv.rb: Reject nil as data source for CSV.new, patch by @Peeja.
diff --git a/test/lib/minitest/unit.rb b/test/lib/minitest/unit.rb
index a27926b3c7..444e56e634 100644
--- a/test/lib/minitest/unit.rb
+++ b/test/lib/minitest/unit.rb
@@ -969,8 +969,10 @@ module MiniTest
     def check_thread_leak(inst, live1, live2)
       thread_finished = live1 - live2
       if !thread_finished.empty?
-        list = thread_finished.map {|t| ' ' + t.inspect }.sort.join
-        puts "Finished threads: #{inst.class}\##{inst.__name__}:#{list}"
+        list = thread_finished.map {|t| t.inspect }.sort
+        list.each {|str|
+          puts "Finished thread: #{inst.class}\##{inst.__name__}: #{str}"
+        }
       end
       thread_retained = live2 - live1
       if !thread_retained.empty?