diff --git a/test/socket/test_socket.rb b/test/socket/test_socket.rb
index 3fdb2fa7be..a34d0e8b2a 100644
--- a/test/socket/test_socket.rb
+++ b/test/socket/test_socket.rb
@@ -240,9 +240,12 @@ class TestSocket < Test::Unit::TestCase
           unix_server = Socket.unix_server_socket("#{tmpdir}/sock")
           tcp_servers.each {|s|
             addr = s.connect_address
-            assert_nothing_raised("connect to #{addr.inspect}") {
+            begin
               clients << addr.connect
-            }
+            rescue
+              # allow failure if the address is IPv6
+              raise unless addr.ipv6?
+            end
           }
           addr = unix_server.connect_address
           assert_nothing_raised("connect to #{addr.inspect}") {
diff --git a/version.h b/version.h
index 03a90cc5d6..4501d3c52f 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.3.0"
 #define RUBY_RELEASE_DATE "2015-12-25"
-#define RUBY_PATCHLEVEL 0
+#define RUBY_PATCHLEVEL 1
 
 #define RUBY_RELEASE_YEAR 2015
 #define RUBY_RELEASE_MONTH 12