diff --git a/ChangeLog b/ChangeLog
index 9c0dee4842..128efa0a9f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Fri Apr 22 17:49:34 2016  Hiroshi Shirosaki  <h.shirosaki@gmail.com>
+
+	* lib/rubygems/test_case.rb: Fix test on Windows for inconsistent temp path.
+	  https://github.com/rubygems/rubygems/pull/1554
+	  [Bug #12193][ruby-core:74431]
+
 Fri Apr  1 00:41:17 2016  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* test/rubygems/test_gem_commands_environment_command.rb (test_execute):
diff --git a/lib/rubygems/test_case.rb b/lib/rubygems/test_case.rb
index 328731d4ea..574a1149d0 100644
--- a/lib/rubygems/test_case.rb
+++ b/lib/rubygems/test_case.rb
@@ -247,6 +247,17 @@ class Gem::TestCase < MiniTest::Unit::TestCase
       @tempdir.untaint
     end
 
+    # This makes the tempdir consistent on Windows.
+    # Dir.tmpdir may return short path name, but Dir[Dir.tmpdir] returns long
+    # path name. https://bugs.ruby-lang.org/issues/10819
+    # File.expand_path or File.realpath doesn't convert path name to long path
+    # name. Only Dir[] (= Dir.glob) works.
+    # Short and long path name is specific to Windows filesystem.
+    if win_platform?
+      @tempdir = Dir[@tempdir][0]
+      @tempdir.untaint
+    end
+
     @gemhome  = File.join @tempdir, 'gemhome'
     @userhome = File.join @tempdir, 'userhome'
     ENV["GEM_SPEC_CACHE"] = File.join @tempdir, 'spec_cache'
diff --git a/version.h b/version.h
index 60376cd2d5..8c2dfbb5db 100644
--- a/version.h
+++ b/version.h
@@ -1,10 +1,10 @@
 #define RUBY_VERSION "2.1.10"
-#define RUBY_RELEASE_DATE "2016-04-01"
-#define RUBY_PATCHLEVEL 492
+#define RUBY_RELEASE_DATE "2016-04-22"
+#define RUBY_PATCHLEVEL 493
 
 #define RUBY_RELEASE_YEAR 2016
 #define RUBY_RELEASE_MONTH 4
-#define RUBY_RELEASE_DAY 1
+#define RUBY_RELEASE_DAY 22
 
 #include "ruby/version.h"