diff --git a/ChangeLog b/ChangeLog
index fbc7a6fea9..0f5c603315 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Feb 18 23:18:41 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
+
+	* test/socket/test_socket.rb: unix socket is required by test case.
+
 Tue Feb 18 20:48:38 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
 
 	* test/socket/test_addrinfo.rb: remove unused variables.
diff --git a/test/socket/test_unix.rb b/test/socket/test_unix.rb
index 8b6b705050..ada614c23f 100644
--- a/test/socket/test_unix.rb
+++ b/test/socket/test_unix.rb
@@ -441,6 +441,7 @@ class TestSocket_UNIXSocket < Test::Unit::TestCase
     Dir.mktmpdir {|d|
       sockpath = "#{d}/sock"
       serv = Socket.unix_server_socket(sockpath)
+      Socket.unix(sockpath)
       s, = serv.accept
       cred = s.getsockopt(:SOCKET, :PEERCRED)
       inspect = cred.inspect
@@ -456,6 +457,7 @@ class TestSocket_UNIXSocket < Test::Unit::TestCase
     Dir.mktmpdir {|d|
       sockpath = "#{d}/sock"
       serv = Socket.unix_server_socket(sockpath)
+      Socket.unix(sockpath)
       s, = serv.accept
       cred = s.getsockopt(0, Socket::LOCAL_PEERCRED)
       inspect = cred.inspect