diff --git a/test/ruby/test_process.rb b/test/ruby/test_process.rb
index 2f0777cc46..668d054743 100644
--- a/test/ruby/test_process.rb
+++ b/test/ruby/test_process.rb
@@ -449,7 +449,7 @@ class TestProcess < Test::Unit::TestCase
   end
 
   def test_popen_fork
-    return if /freebsd/ =~ RUBY_PLATFORM
+    return if /freebsd/ =~ RUBY_PLATFORM # this test freeze in FreeBSD
     IO.popen("-") {|io|
       if !io
         puts "fooo"